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table primitives working 

$ ./translate_subx init.linux 0*.subx  &&  ./a.elf test
This commit is contained in:
Kartik Agaram 2020-04-03 00:19:31 -07:00
parent 546a92985f
commit ca358b17a3
9 changed files with 903 additions and 1245 deletions
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537
069allocate.subx
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@ -16,8 +16,8 @@
# very same 'allocate' helper. They just need a new allocation descriptor for
# their book-keeping.
#
# Allocations are returned in a handle, which consists of an allocid and a payload.
# The allocid helps detect use-after-free errors.
# Allocations are returned in a handle, which consists of an alloc-id and a payload.
# The alloc-id helps detect use-after-free errors.
== data
@ -32,6 +32,9 @@ Heap: # allocation-descriptor
Heap-size: # int
0x400000/imm32/4MB
Next-alloc-id: # int
1/imm32
== code
# instruction effective address register displacement immediate
# . op subop mod rm32 base index scale r32
@ -74,9 +77,10 @@ allocate: # ad: (addr allocation-descriptor), n: int, out: (addr handle)
e8/call allocate-raw/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# eax = out->payload
# eax = out->payload + 4
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax
8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax
05/add-to-eax 4/imm32
# zero-out(eax, n)
# . . push args
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
@ -104,26 +108,38 @@ allocate-raw: # ad: (addr allocation-descriptor), n: int, out: (addr handle)
51/push-ecx
52/push-edx
53/push-ebx
56/push-esi
57/push-edi
# ecx = ad
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 8/disp8 . # copy *(ebp+8) to ecx
# edx = out
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 0x10/disp8 . # copy *(ebp+16) to edx
# ebx = n
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 3/r32/ebx 0xc/disp8 . # copy *(ebp+12) to ebx
# out->allocid = 0
c7 0/subop/copy 0/mod/direct 2/rm32/edx . . . . . 0/imm32 # copy to *edx
# out->alloc-id = Next-alloc-id
8b/copy 0/mod/indirect 5/rm32/.disp32 . . 0/r32/eax Next-alloc-id/disp32 # copy *Next-alloc-id to eax
89/copy 0/mod/indirect 2/rm32/edx . . . 0/r32/eax . . # copy eax to *edx
# out->payload = ad->curr
8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
89/copy 1/mod/*+disp8 2/rm32/edx . . . 0/r32/eax 4/disp8 . # copy eax to *(edx+4)
# *out->payload = Next-alloc-id
8b/copy 1/mod/*+disp8 2/rm32/edx . . . 7/r32/edi 4/disp8 . # copy *(edx+4) to edi
8b/copy 0/mod/indirect 5/rm32/.disp32 . . 6/r32/esi Next-alloc-id/disp32 # copy *Next-alloc-id to esi
89/copy 0/mod/indirect 7/rm32/edi . . . 6/r32/esi . . # copy esi to *edi
# increment *Next-alloc-id
ff 0/subop/increment 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # increment *Next-alloc-id
# check if there's enough space
# TODO: move this check up before any state updates when we support error recovery
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 3/index/ebx . 0/r32/eax 4/disp8 . # copy eax+ebx+4 to eax
3b/compare 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # compare eax with *(ecx+4)
73/jump-if->=-signed $allocate-raw:abort/disp8
$allocate-raw:commit:
# update ad->curr
# ad->curr += n+4
89/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy eax to *ecx
$allocate-raw:end:
# . restore registers
5f/pop-to-edi
5e/pop-to-esi
5b/pop-to-ebx
5a/pop-to-edx
59/pop-to-ecx
@ -152,14 +168,26 @@ test-allocate-raw-success:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# var ad/ecx: allocation-descriptor = {11, 32}
68/push 0x20/imm32/limit
68/push 0xb/imm32/curr
# var ad/ecx: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# ad = new-segment(512)
# . . push args
51/push-ecx
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# var expected-payload/ebx = ad->curr
8b/copy 0/mod/indirect 1/rm32/ecx . . . 3/r32/ebx . . # copy *ecx to ebx
# var h/edx: handle = {0, 0}
68/push 0/imm32
68/push 0/imm32
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
# *Next-alloc-id = 0x34
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 0x34/imm32 # copy to *Next-alloc-id
# allocate-raw(ad, 3, h)
# . . push args
52/push-edx
@ -169,66 +197,228 @@ test-allocate-raw-success:
e8/call allocate-raw/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# eax = h->payload
8b/copy 1/mod/*+disp8 2/rm32/edx . . . 0/r32/eax 4/disp8 . # copy *(edx+4) to eax
# check-ints-equal(eax, 11, msg)
# check-ints-equal(h->alloc-id, 0x34, msg)
# . . push args
68/push "F - test-allocate-raw-success: returns current pointer of allocation descriptor"/imm32
68/push 0xb/imm32
68/push "F - test-allocate-raw-success: sets alloc-id in handle"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->payload, expected-payload, msg)
# . . push args
68/push "F - test-allocate-raw-success: sets payload in handle"/imm32
53/push-ebx
ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->payload->alloc-id, 0x34, msg)
# . . push args
68/push "F - test-allocate-raw-success: sets alloc-id in payload"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(*Next-alloc-id, 0x35, msg)
# . . push args
68/push "F - test-allocate-raw-success: increments Next-alloc-id"/imm32
68/push 0x35/imm32
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # push *Next-alloc-id
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(ad->curr - expected-payload, 3 + 4 for alloc-id, msg)
# . . push args
68/push "F - test-allocate-raw-success: updates allocation descriptor"/imm32
68/push 7/imm32
8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
29/subtract 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # subtract ebx from eax
50/push-eax
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(ad->curr, 18, msg)
# . . push args
68/push "F - test-allocate-raw-success: updates allocation descriptor"/imm32
68/push 0x12/imm32
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# clean up
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
_pending-test-allocate-raw-failure:
lookup: # h: (handle T) -> eax: (addr T)
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# var ad/ecx: allocation-descriptor = {11, 15}
68/push 0xf/imm32/limit
68/push 0xb/imm32/curr
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# var eax: (handle byte) = allocate-raw(ad, 6)
# . . push args
68/push 6/imm32
# . save registers
51/push-ecx
# ecx = handle->alloc_id
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 8/disp8 . # copy *(ebp+8) to ecx
# eax = handle->address (payload)
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax
# if (ecx != *eax) abort
39/compare 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # compare *eax and ecx
75/jump-if-!= $lookup:abort/disp8
# add 4 to eax
05/add-to-eax 4/imm32
$lookup:end:
# . restore registers
59/pop-to-ecx
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
$lookup:abort:
# . _write(2/stderr, msg)
# . . push args
68/push "lookup failed\n"/imm32
68/push 2/imm32/stderr
# . . call
e8/call _write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . syscall(exit, 1)
bb/copy-to-ebx 1/imm32/exit-status
b8/copy-to-eax 1/imm32/exit
cd/syscall 0x80/imm8
test-lookup-success:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# . save registers
# var ad/ebx: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx
# ad = new-segment(512)
# . . push args
53/push-ebx
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# var handle/ecx: handle
68/push 0/imm32/address
68/push 0/imm32/alloc-id
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# var old-top/edx = ad->curr
8b/copy 0/mod/indirect 3/rm32/ebx . . . 2/r32/edx . . # copy *ebx to edx
# allocate-raw(ad, 2, handle)
# . . push args
51/push-ecx
68/push 2/imm32/size
53/push-ebx
# . . call
e8/call allocate-raw/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# check-ints-equal(eax, 0, msg)
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# eax = lookup(handle)
# . . push args
68/push "F - test-allocate-raw-failure: returns null"/imm32
68/push 0/imm32
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 4/disp8 . # push *(ecx+4)
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
# . . call
e8/call lookup/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# eax contains old top of heap, except skipping the alloc-id in the payload
# . check-ints-equal(eax, old-top+4, msg)
# . . push args
68/push "F - test-lookup-success"/imm32
81 0/subop/add 3/mod/direct 2/rm32/edx . . . . . 4/imm32 # add to edx
52/push-edx
50/push-eax
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# no change to ad->curr
# . check-ints-equal(ad->curr, 11)
# clean up
# . *Next-alloc-id = 1
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . restore registers
5a/pop-to-edx
59/pop-to-ecx
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
_pending-test-lookup-failure:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# var heap/esi: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
# heap = new-segment(512)
# . . push args
68/push "F - test-allocate-raw-failure: updates allocation descriptor"/imm32
68/push 0xb/imm32
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
56/push-esi
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# var h1/ecx: handle
68/push 0/imm32/address
68/push 0/imm32/alloc-id
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# var old_top/ebx = heap->curr
8b/copy 0/mod/indirect 6/rm32/esi . . . 3/r32/ebx . . # copy *esi to ebx
# first allocation, to h1
# . allocate(heap, 2, h1)
# . . push args
51/push-ecx
68/push 2/imm32/size
56/push-esi
# . . call
e8/call allocate/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# reset heap->curr to mimic reclamation
89/copy 0/mod/indirect 6/rm32/esi . . . 3/r32/ebx . . # copy ebx to *esi
# second allocation that returns the same address as the first
# var h2/edx: handle
68/push 0/imm32/address
68/push 0/imm32/alloc-id
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
# . allocate(heap, 2, h2)
# . . push args
52/push-edx
68/push 2/imm32/size
56/push-esi
# . . call
e8/call allocate/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h1->address, h2->address, msg)
# . . push args
68/push "F - test-lookup-failure"/imm32
ff 6/subop/push 1/mod/*+disp8 2/rm32/ecx . . . . 4/disp8 . # push *(edx+4)
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 4/disp8 . # push *(ecx+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# lookup(h1) should crash
# . . push args
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 4/disp8 . # push *(ecx+4)
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
# . . call
e8/call lookup/disp32
# should never get past this point
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# clean up
# . *Next-alloc-id = 1
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
@ -254,6 +444,8 @@ allocate-region: # ad: (addr allocation-descriptor), n: int, out: (addr handle
# eax = out->payload
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax
8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax
# skip payload->allocid
05/add-to-eax 4/imm32
# if (eax == 0) abort
3d/compare-eax-and 0/imm32
74/jump-if-= $allocate-region:abort/disp8
@ -321,6 +513,9 @@ allocate-array: # ad: (addr allocation-descriptor), n: int, out: (addr handle)
# *out->payload = n
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax
8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax
# . skip payload->allocid
05/add-to-eax 4/imm32
# .
89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax
$allocate-array:end:
# . restore registers
@ -332,6 +527,268 @@ $allocate-array:end:
5d/pop-to-ebp
c3/return
test-allocate-array:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# var ad/ecx: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# ad = new-segment(512)
# . . push args
51/push-ecx
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# var expected-payload/ebx = ad->curr
8b/copy 0/mod/indirect 1/rm32/ecx . . . 3/r32/ebx . . # copy *ecx to ebx
# var h/edx: handle = {0, 0}
68/push 0/imm32
68/push 0/imm32
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
# *Next-alloc-id = 0x34
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 0x34/imm32 # copy to *Next-alloc-id
# allocate-array(ad, 3, h)
# . . push args
52/push-edx
68/push 3/imm32
51/push-ecx
# . . call
e8/call allocate-array/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->alloc-id, 0x34, msg)
# . . push args
68/push "F - test-allocate-array: sets alloc-id in handle"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->payload, expected-payload, msg)
# . . push args
68/push "F - test-allocate-array: sets payload in handle"/imm32
53/push-ebx
ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->payload->alloc-id, 0x34, msg)
# . . push args
68/push "F - test-allocate-array: sets alloc-id in payload"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->payload->size, 3, msg)
# . . push args
68/push "F - test-allocate-array: sets array size in payload"/imm32
68/push 3/imm32
ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(*Next-alloc-id, 0x35, msg)
# . . push args
68/push "F - test-allocate-array: increments Next-alloc-id"/imm32
68/push 0x35/imm32
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # push *Next-alloc-id
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(ad->curr - expected-payload, 3 + 4 for alloc-id + 4 for array size, msg)
# . . push args
68/push "F - test-allocate-array: updates allocation descriptor"/imm32
68/push 0xb/imm32
8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
29/subtract 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # subtract ebx from eax
50/push-eax
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# clean up
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
copy-array: # ad: (addr allocation-descriptor), src: (addr array), out: (addr handle)
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# . save registers
50/push-eax
51/push-ecx
52/push-edx
56/push-esi
# esi = src
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 0xc/disp8 . # copy *(ebp+12) to esi
# var size/ecx: int = src->size+4
8b/copy 0/mod/indirect 6/rm32/esi . . . 1/r32/ecx . . # copy *esi to ecx
81 0/subop/add 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # add to ecx
# allocate(ad, size, out)
# . . push args
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16)
51/push-ecx
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8)
# . . call
e8/call allocate/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# var payload/eax: (addr byte) = out->payload
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax
8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax
# . skip payload->allocid
05/add-to-eax 4/imm32
# var max/ecx: (addr byte) = payload + size
01/add 3/mod/direct 1/rm32/ecx . . . 0/r32/eax . . # add eax to ecx
# _append-4(payload, max, src, &src->data[src->size])
# . . push &src->data[src->size]
8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 2/index/edx . 2/r32/edx 4/disp8 . # copy esi+edx+4 to edx
52/push-edx
# . . push src
56/push-esi
# . . push max
51/push-ecx
# . . push payload
50/push-eax
# . . call
e8/call _append-4/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp
$copy-array:end:
# . restore registers
5e/pop-to-esi
5a/pop-to-edx
59/pop-to-ecx
58/pop-to-eax
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
test-copy-array:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# var src/esi: (addr array int) = [3, 4, 5]
68/push 5/imm32
68/push 4/imm32
68/push 3/imm32
68/push 0xc/imm32/size
89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
# var ad/ecx: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# ad = new-segment(512)
# . . push args
51/push-ecx
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# var expected-payload/ebx = ad->curr
8b/copy 0/mod/indirect 1/rm32/ecx . . . 3/r32/ebx . . # copy *ecx to ebx
# var h/edx: handle = {0, 0}
68/push 0/imm32
68/push 0/imm32
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
# *Next-alloc-id = 0x34
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 0x34/imm32 # copy to *Next-alloc-id
# copy-array(ad, src, h)
# . . push args
52/push-edx
56/push-esi
51/push-ecx
# . . call
e8/call copy-array/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->alloc-id, 0x34, msg)
# . . push args
68/push "F - test-copy-array: sets alloc-id in handle"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->payload, expected-payload, msg)
# . . push args
68/push "F - test-copy-array: sets payload in handle"/imm32
53/push-ebx
ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h->payload->alloc-id, 0x34, msg)
# . . push args
68/push "F - test-copy-array: sets alloc-id in payload"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# var payload/eax: (addr int) = lookup(h)
# . . push args
ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4)
ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx
# . . call
e8/call lookup/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# check-ints-equal(payload->size, 0xc, msg)
# . . push args
68/push "F - test-copy-array: sets array size in payload"/imm32
68/push 0xc/imm32
ff 6/subop/push 0/mod/indirect 0/rm32/eax . . . . . . # push *eax
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(*Next-alloc-id, 0x35, msg)
# . . push args
68/push "F - test-copy-array: increments Next-alloc-id"/imm32
68/push 0x35/imm32
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # push *Next-alloc-id
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(ad->curr - expected-payload, 12 + 4 for alloc-id + 4 for length, msg)
# . . push args
68/push "F - test-copy-array: updates allocation descriptor"/imm32
68/push 0x14/imm32
8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax
29/subtract 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # subtract ebx from eax
50/push-eax
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# clean up
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
# Fill a region of memory with zeroes.
zero-out: # start: (addr byte), len: int
# pseudocode:

8
070new-stream.subx
View File

@ -5,14 +5,14 @@
# . op subop mod rm32 base index scale r32
# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes
new-stream: # ad: (addr allocation-descriptor), length: int, elemsize: int, out: (handle stream _)
new-stream: # ad: (addr allocation-descriptor), length: int, elemsize: int, out: (addr handle stream _)
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# . save registers
50/push-eax
52/push-edx
# var n/eax: int = elemsize * length + 12 (for read, write and size)
# var size/edx: int = elemsize*length (clobbering eax)
# . eax = elemsize
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax
# . eax *= length
@ -23,7 +23,7 @@ new-stream: # ad: (addr allocation-descriptor), length: int, elemsize: int, out
75/jump-if-!= $new-stream:abort/disp8
# . edx = elemsize*length
89/copy 3/mod/direct 2/rm32/edx . . . 0/r32/eax . . # copy eax to edx
# . eax += 12
# var n/eax: int = size + 12 (for read, write and size)
05/add-to-eax 0xc/imm32
# allocate(ad, n, out)
# . . push args
@ -39,7 +39,7 @@ new-stream: # ad: (addr allocation-descriptor), length: int, elemsize: int, out
8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax
# skip payload->allocid
05/add-to-eax 4/imm32
# eax->size = elemsize*length
# eax->size = size
89/copy 1/mod/*+disp8 0/rm32/eax . . . 2/r32/edx 8/disp8 . # copy edx to *(eax+8)
# clear-stream(eax)
# . . push args

660
081table.subx
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BIN
apps/handle
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428
apps/handle.subx
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@ -1,428 +0,0 @@
# A sketch of Mu-style handles or kinda-safe pointers, that add a modicum of
# checking to dynamically allocated memory.
#
# This approach avoids using 'allocate' directly in favor of two primitives:
# - 'new', which allocates some space (the 'payload'), stores the address
# along with an opaque 'alloc id' in a 'handle', and prepends the same
# alloc id to the payload.
# - 'lookup', which checks that the alloc id at the start of a handle matches
# the alloc id at the start of the payload before returning the address.
#
# Layout of a handle:
# offset 0: alloc id
# offset 4: address
#
# To run:
# $ ./bootstrap translate init.linux 0*.subx apps/handle.subx -o apps/handle
# $ ./bootstrap run apps/handle
# Expected result is a successful lookup followed by a hard abort:
# lookup succeeded
# lookup failed
# (This file is a prototype. The 'tests' in it aren't real; failures are
# expected.)
== code
# instruction effective address register displacement immediate
# . op subop mod rm32 base index scale r32
# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes
Entry:
# initialize heap
# . Heap = new-segment(Heap-size)
# . . push args
68/push Heap/imm32
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Heap-size/disp32 # push *Heap-size
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
$handle-main:end:
# syscall(exit, Num-test-failures)
8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/ebx Num-test-failures/disp32 # copy *Num-test-failures to ebx
b8/copy-to-eax 1/imm32/exit
cd/syscall 0x80/imm8
new: # ad: (addr allocation-descriptor), n: int, out: (handle _)
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# . save registers
50/push-eax
51/push-ecx
52/push-edx
# ecx = n+4
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0xc/disp8 . # copy *(ebp+12) to ecx
81 0/subop/add 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # add to ecx
# var eax: (handle _) = allocate(ad, ecx)
# . . push args
51/push-ecx
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8)
# . . call
e8/call allocate/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# edx = out
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 0x10/disp8 . # copy *(ebp+16) to edx
# out->address = eax
89/copy 1/mod/*+disp8 2/rm32/edx . . . 0/r32/eax 4/disp8 . # copy eax to *(edx+4)
# if (eax == 0) out->alloc_id = 0, return
3d/compare-eax-and 0/imm32
75/jump-if-!= $new:continue/disp8
c7 0/subop/copy 0/mod/indirect 2/rm32/edx . . . . . 0/imm32 # copy to *edx
eb/jump $new:end/disp8
$new:continue:
# otherwise:
# ecx = *Next-alloc-id
8b/copy 0/mod/indirect 5/rm32/.disp32 . . 1/r32/ecx Next-alloc-id/disp32 # copy *Next-alloc-id to ecx
# *eax = *Next-alloc-id/ecx
89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax
# out->alloc_id = *Next-alloc-id
89/copy 0/mod/indirect 2/rm32/edx . . . 1/r32/ecx . . # copy ecx to *edx
# increment *Next-alloc-id
ff 0/subop/increment 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # increment *Next-alloc-id
$new:end:
# . restore registers
5a/pop-to-edx
59/pop-to-ecx
58/pop-to-eax
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
test-new:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# var heap/edx: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
# heap = new-segment(512)
# . . push args
52/push-edx
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# *Next-alloc-id = 0x34
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 0x34/imm32 # copy to *Next-alloc-id
# var handle/ecx: handle
68/push 0/imm32/address
68/push 0/imm32/alloc-id
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# new(heap, 2, handle/ecx)
# . . push args
51/push-ecx
68/push 2/imm32/size
52/push-edx
# . . call
e8/call new/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(handle->alloc_id, 0x34, msg)
# . . push args
68/push "F - test-new: alloc id of handle"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(*handle->address, 0x34, msg)
# . . push args
68/push "F - test-new: alloc id of payload"/imm32
68/push 0x34/imm32
8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 2/r32/edx 4/disp8 . # copy *(ecx+4) to edx
ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(*Next-alloc-id, 0x35)
# . . push args
68/push "F - test-new: next alloc id"/imm32
68/push 0x35/imm32
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # copy to *Next-alloc-id
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# clean up
# . *Next-alloc-id = 1
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
_pending-test-new-failure:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# . *Next-alloc-id = 0x34
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 0x34/imm32 # copy to *Next-alloc-id
# define an allocation-descriptor with no space left
# . var ad/eax: allocation-descriptor = {0x10, 0x10}
68/push 0x10/imm32/limit
68/push 0x10/imm32/curr
89/copy 3/mod/direct 0/rm32/eax . . . 4/r32/esp . . # copy esp to eax
# . var handle/ecx = {random, random}
68/push 1234/imm32/address
68/push 5678/imm32/alloc-id
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# try to allocate
# . new(ad, 2, handle/ecx)
# . . push args
51/push-ecx
68/push 2/imm32/size
50/push-eax
# . . call
e8/call new/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# handle should be cleared
# . check-ints-equal(handle->alloc_id, 0, msg)
# . . push args
68/push "F - test-new-failure: alloc id of handle"/imm32
68/push 0/imm32
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . check-ints-equal(handle->address, 0, msg)
# . . push args
68/push "F - test-new-failure: address of handle"/imm32
68/push 0/imm32
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 4/disp8 . # push *(ecx+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# Next-alloc-id should be unmodified
# . check-ints-equal(*Next-alloc-id, 0x34)
# . . push args
68/push "F - test-new-failure: next alloc id"/imm32
68/push 0x34/imm32
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # copy to *Next-alloc-id
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# clean up
# . *Next-alloc-id = 1
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
lookup: # h: (handle T) -> eax: (addr T)
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# - as a proof of concept for future inlining, uses no general-purpose registers besides the output (eax)
# eax = handle
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 8/disp8 . # copy *(ebp+8) to eax
# - inline {
# push handle->alloc_id
ff 6/subop/push 0/mod/indirect 0/rm32/eax . . . . . . # push *eax
# eax = handle->address (payload)
8b/copy 1/mod/*+disp8 0/rm32/eax . . . . 4/disp8 . # copy *(eax+4) to eax
# push handle->address
50/push-eax
# eax = payload->alloc_id
8b/copy 0/mod/indirect 0/rm32/eax . . . . . . # copy *eax to eax
# if (eax != handle->alloc_id) abort
39/compare 1/mod/*+disp8 4/rm32/sib 4/base/esp 4/index/none . 0/r32/eax 4/disp8 . # compare *(esp+4) and eax
75/jump-if-!= $lookup:abort/disp8
# eax = pop handle->address
58/pop-to-eax
# discard handle->alloc_id
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# add 4
05/add-to-eax 4/imm32
# - }
# - alternative consuming a second register {
#? # ecx = handle->alloc_id
#? 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
#? # eax = handle->address (payload)
#? 8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax
#? # if (ecx != *eax) abort
#? 39/compare 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # compare *eax and ecx
#? 75/jump-if-!= $lookup:abort/disp8
#? # add 4 to eax
#? 05/add-to-eax 4/imm32
# - }
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
$lookup:abort:
# . _write(2/stderr, msg)
# . . push args
68/push "lookup failed\n"/imm32
68/push 2/imm32/stderr
# . . call
e8/call _write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . syscall(exit, 1)
bb/copy-to-ebx 1/imm32/exit-status
b8/copy-to-eax 1/imm32/exit
cd/syscall 0x80/imm8
test-lookup-success:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# . save registers
# var heap/ebx: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx
# heap = new-segment(512)
# . . push args
53/push-ebx
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# var handle/ecx: handle
68/push 0/imm32/address
68/push 0/imm32/alloc-id
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# var old_top/edx = heap->curr
8b/copy 0/mod/indirect 3/rm32/ebx . . . 2/r32/edx . . # copy *ebx to edx
# new(heap, 2, handle)
# . . push args
51/push-ecx
68/push 2/imm32/size
53/push-ebx
# . . call
e8/call new/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# eax = lookup(handle)
# . . push args
51/push-ecx
# . . call
e8/call lookup/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# eax contains old top of heap, except skipping the alloc id in the payload
# . check-ints-equal(eax, old_top+4, msg)
# . . push args
68/push "F - test-lookup-success"/imm32
81 0/subop/add 3/mod/direct 2/rm32/edx . . . . . 4/imm32 # add to edx
52/push-edx
50/push-eax
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# clean up
# . *Next-alloc-id = 1
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# write(2/stderr, "lookup succeeded\n")
# . . push args
68/push "lookup succeeded\n"/imm32
68/push 2/imm32/stderr
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . restore registers
5a/pop-to-edx
59/pop-to-ecx
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
test-lookup-failure:
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# var heap/esi: allocation-descriptor
68/push 0/imm32/limit
68/push 0/imm32/curr
89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
# heap = new-segment(512)
# . . push args
56/push-esi
68/push 0x200/imm32
# . . call
e8/call new-segment/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# var h1/ecx: handle
68/push 0/imm32/address
68/push 0/imm32/alloc-id
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
# var old_top/ebx = heap->curr
8b/copy 0/mod/indirect 6/rm32/esi . . . 3/r32/ebx . . # copy *esi to ebx
# first allocation, to h1
# . new(heap, 2, h1)
# . . push args
51/push-ecx
68/push 2/imm32/size
56/push-esi
# . . call
e8/call new/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# reset heap->curr to mimic reclamation
89/copy 0/mod/indirect 6/rm32/esi . . . 3/r32/ebx . . # copy ebx to *esi
# second allocation that returns the same address as the first
# var h2/edx: handle
68/push 0/imm32/address
68/push 0/imm32/alloc-id
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
# . new(heap, 2, h2)
# . . push args
52/push-edx
68/push 2/imm32/size
56/push-esi
# . . call
e8/call new/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# check-ints-equal(h1->address, h2->address, msg)
# . . push args
68/push "F - test-lookup-failure"/imm32
ff 6/subop/push 1/mod/*+disp8 2/rm32/ecx . . . . 4/disp8 . # push *(edx+4)
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 4/disp8 . # push *(ecx+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# lookup(h1) should crash
# . . push args
51/push-ecx
# . . call
e8/call lookup/disp32
# should never get past this point
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# clean up
# . *Next-alloc-id = 1
c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
== data
# Monotonically increasing counter for calls to 'new'
Next-alloc-id: # int
1/imm32
# . . vim:nowrap:textwidth=0

1
apps/mu.subx
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@ -7778,6 +7778,7 @@ $emit-subx-stmt:end:
5d/pop-to-ebp
c3/return
# TODO: actually return the length in array elements, rather than the size in bytes
translate-mu-length-stmt: # out: (address buffered-file), stmt: (handle stmt)
# . prologue
55/push-ebp

495
html/apps/handle.subx.html
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@ -1,495 +0,0 @@
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<head>
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<title>Mu - apps/handle.subx</title>
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<a href='https://github.com/akkartik/mu/blob/master/apps/handle.subx'>https://github.com/akkartik/mu/blob/master/apps/handle.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># A sketch of Mu-style handles or kinda-safe pointers, that add a modicum of</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># checking to dynamically allocated memory.</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment">#</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># This approach avoids using 'allocate' directly in favor of two primitives:</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># - 'new', which allocates some space (the 'payload'), stores the address</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># along with an opaque 'alloc id' in a 'handle', and prepends the same</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># alloc id to the payload.</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># - 'lookup', which checks that the alloc id at the start of a handle matches</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># the alloc id at the start of the payload before returning the address.</span>
<span id="L10" class="LineNr"> 10 </span><span class="subxComment">#</span>
<span id="L11" class="LineNr"> 11 </span><span class="subxComment"># Layout of a handle:</span>
<span id="L12" class="LineNr"> 12 </span><span class="subxComment"># offset 0: alloc id</span>
<span id="L13" class="LineNr"> 13 </span><span class="subxComment"># offset 4: address</span>
<span id="L14" class="LineNr"> 14 </span><span class="subxComment">#</span>
<span id="L15" class="LineNr"> 15 </span><span class="subxComment"># To run:</span>
<span id="L16" class="LineNr"> 16 </span><span class="subxComment"># $ ./bootstrap translate init.linux 0*.subx apps/handle.subx -o apps/handle</span>
<span id="L17" class="LineNr"> 17 </span><span class="subxComment"># $ ./bootstrap run apps/handle</span>
<span id="L18" class="LineNr"> 18 </span><span class="subxComment"># Expected result is a successful lookup followed by a hard abort:</span>
<span id="L19" class="LineNr"> 19 </span><span class="subxComment"># lookup succeeded</span>
<span id="L20" class="LineNr"> 20 </span><span class="subxComment"># lookup failed</span>
<span id="L21" class="LineNr"> 21 </span><span class="subxComment"># (This file is a prototype. The 'tests' in it aren't real; failures are</span>
<span id="L22" class="LineNr"> 22 </span><span class="subxComment"># expected.)</span>
<span id="L23" class="LineNr"> 23 </span>
<span id="L24" class="LineNr"> 24 </span>== code
<span id="L25" class="LineNr"> 25 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L26" class="LineNr"> 26 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L27" class="LineNr"> 27 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L28" class="LineNr"> 28 </span>
<span id="L29" class="LineNr"> 29 </span><span class="SpecialChar">Entry</span>:
<span id="L30" class="LineNr"> 30 </span> <span class="subxComment"># initialize heap</span>
<span id="L31" class="LineNr"> 31 </span> <span class="subxS1Comment"># . Heap = new-segment(Heap-size)</span>
<span id="L32" class="LineNr"> 32 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L33" class="LineNr"> 33 </span> 68/push <span class="SpecialChar"><a href='../069allocate.subx.html#L22'>Heap</a></span>/imm32
<span id="L34" class="LineNr"> 34 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='../069allocate.subx.html#L29'>Heap-size</a></span>/disp32 <span class="subxComment"># push *Heap-size</span>
<span id="L35" class="LineNr"> 35 </span> <span class="subxS2Comment"># . . call</span>
<span id="L36" class="LineNr"> 36 </span> e8/call <a href='../053new-segment.subx.html#L41'>new-segment</a>/disp32
<span id="L37" class="LineNr"> 37 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L38" class="LineNr"> 38 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L39" class="LineNr"> 39 </span>
<span id="L40" class="LineNr"> 40 </span> e8/call run-tests/disp32 <span class="subxComment"># 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.</span>
<span id="L41" class="LineNr"> 41 </span><span class="Constant">$handle-main:end</span>:
<span id="L42" class="LineNr"> 42 </span> <span class="subxComment"># syscall(exit, Num-test-failures)</span>
<span id="L43" class="LineNr"> 43 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="SpecialChar"><a href='../051test.subx.html#L90'>Num-test-failures</a></span>/disp32 <span class="subxComment"># copy *Num-test-failures to ebx</span>
<span id="L44" class="LineNr"> 44 </span> b8/copy-to-eax 1/imm32/exit
<span id="L45" class="LineNr"> 45 </span> cd/syscall 0x80/imm8
<span id="L46" class="LineNr"> 46 </span>
<span id="L47" class="LineNr"> 47 </span><span class="subxFunction">new</span>: <span class="subxComment"># ad: (addr allocation-descriptor), n: int, out: (handle _)</span>
<span id="L48" class="LineNr"> 48 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L49" class="LineNr"> 49 </span> 55/push-ebp
<span id="L50" class="LineNr"> 50 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L51" class="LineNr"> 51 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L52" class="LineNr"> 52 </span> 50/push-eax
<span id="L53" class="LineNr"> 53 </span> 51/push-ecx
<span id="L54" class="LineNr"> 54 </span> 52/push-edx
<span id="L55" class="LineNr"> 55 </span> <span class="subxComment"># ecx = n+4</span>
<span id="L56" class="LineNr"> 56 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to ecx</span>
<span id="L57" class="LineNr"> 57 </span> 81 0/subop/add 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to ecx</span>
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment"># var eax: (handle _) = allocate(ad, ecx)</span>
<span id="L59" class="LineNr"> 59 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L60" class="LineNr"> 60 </span> 51/push-ecx
<span id="L61" class="LineNr"> 61 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L62" class="LineNr"> 62 </span> <span class="subxS2Comment"># . . call</span>
<span id="L63" class="LineNr"> 63 </span> e8/call <a href='../069allocate.subx.html#L59'>allocate</a>/disp32
<span id="L64" class="LineNr"> 64 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L65" class="LineNr"> 65 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L66" class="LineNr"> 66 </span> <span class="subxComment"># edx = out</span>
<span id="L67" class="LineNr"> 67 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to edx</span>
<span id="L68" class="LineNr"> 68 </span> <span class="subxComment"># out-&gt;address = eax</span>
<span id="L69" class="LineNr"> 69 </span> 89/copy 1/mod/*+disp8 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax to *(edx+4)</span>
<span id="L70" class="LineNr"> 70 </span> <span class="subxComment"># if (eax == 0) out-&gt;alloc_id = 0, return</span>
<span id="L71" class="LineNr"> 71 </span> 3d/compare-eax-and 0/imm32
<span id="L72" class="LineNr"> 72 </span> 75/jump-if-!= $new:continue/disp8
<span id="L73" class="LineNr"> 73 </span> c7 0/subop/copy 0/mod/indirect 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm32 <span class="subxComment"># copy to *edx</span>
<span id="L74" class="LineNr"> 74 </span> eb/jump $new:end/disp8
<span id="L75" class="LineNr"> 75 </span><span class="Constant">$new:continue</span>:
<span id="L76" class="LineNr"> 76 </span> <span class="subxComment"># otherwise:</span>
<span id="L77" class="LineNr"> 77 </span> <span class="subxComment"># ecx = *Next-alloc-id</span>
<span id="L78" class="LineNr"> 78 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># copy *Next-alloc-id to ecx</span>
<span id="L79" class="LineNr"> 79 </span> <span class="subxComment"># *eax = *Next-alloc-id/ecx</span>
<span id="L80" class="LineNr"> 80 </span> 89/copy 0/mod/indirect 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ecx to *eax</span>
<span id="L81" class="LineNr"> 81 </span> <span class="subxComment"># out-&gt;alloc_id = *Next-alloc-id</span>
<span id="L82" class="LineNr"> 82 </span> 89/copy 0/mod/indirect 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ecx to *edx</span>
<span id="L83" class="LineNr"> 83 </span> <span class="subxComment"># increment *Next-alloc-id</span>
<span id="L84" class="LineNr"> 84 </span> ff 0/subop/increment 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># increment *Next-alloc-id</span>
<span id="L85" class="LineNr"> 85 </span><span class="Constant">$new:end</span>:
<span id="L86" class="LineNr"> 86 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L87" class="LineNr"> 87 </span> 5a/pop-to-edx
<span id="L88" class="LineNr"> 88 </span> 59/pop-to-ecx
<span id="L89" class="LineNr"> 89 </span> 58/pop-to-eax
<span id="L90" class="LineNr"> 90 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L91" class="LineNr"> 91 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L92" class="LineNr"> 92 </span> 5d/pop-to-ebp
<span id="L93" class="LineNr"> 93 </span> c3/return
<span id="L94" class="LineNr"> 94 </span>
<span id="L95" class="LineNr"> 95 </span><span class="subxTest">test-new</span>:
<span id="L96" class="LineNr"> 96 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L97" class="LineNr"> 97 </span> 55/push-ebp
<span id="L98" class="LineNr"> 98 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L99" class="LineNr"> 99 </span> <span class="subxComment"># var heap/edx: allocation-descriptor</span>
<span id="L100" class="LineNr">100 </span> 68/push 0/imm32/limit
<span id="L101" class="LineNr">101 </span> 68/push 0/imm32/curr
<span id="L102" class="LineNr">102 </span> 89/copy 3/mod/direct 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to edx</span>
<span id="L103" class="LineNr">103 </span> <span class="subxComment"># heap = new-segment(512)</span>
<span id="L104" class="LineNr">104 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L105" class="LineNr">105 </span> 52/push-edx
<span id="L106" class="LineNr">106 </span> 68/push 0x200/imm32
<span id="L107" class="LineNr">107 </span> <span class="subxS2Comment"># . . call</span>
<span id="L108" class="LineNr">108 </span> e8/call <a href='../053new-segment.subx.html#L41'>new-segment</a>/disp32
<span id="L109" class="LineNr">109 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L110" class="LineNr">110 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L111" class="LineNr">111 </span> <span class="subxComment"># *Next-alloc-id = 0x34</span>
<span id="L112" class="LineNr">112 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 0x34/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L113" class="LineNr">113 </span> <span class="subxComment"># var handle/ecx: handle</span>
<span id="L114" class="LineNr">114 </span> 68/push 0/imm32/address
<span id="L115" class="LineNr">115 </span> 68/push 0/imm32/alloc-id
<span id="L116" class="LineNr">116 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ecx</span>
<span id="L117" class="LineNr">117 </span> <span class="subxComment"># new(heap, 2, handle/ecx)</span>
<span id="L118" class="LineNr">118 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L119" class="LineNr">119 </span> 51/push-ecx
<span id="L120" class="LineNr">120 </span> 68/push 2/imm32/size
<span id="L121" class="LineNr">121 </span> 52/push-edx
<span id="L122" class="LineNr">122 </span> <span class="subxS2Comment"># . . call</span>
<span id="L123" class="LineNr">123 </span> e8/call <a href='handle.subx.html#L47'>new</a>/disp32
<span id="L124" class="LineNr">124 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L125" class="LineNr">125 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L126" class="LineNr">126 </span> <span class="subxComment"># check-ints-equal(handle-&gt;alloc_id, 0x34, msg)</span>
<span id="L127" class="LineNr">127 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L128" class="LineNr">128 </span> 68/push <span class="Constant">&quot;F - <a href='handle.subx.html#L95'>test-new</a>: alloc id of handle&quot;</span>/imm32
<span id="L129" class="LineNr">129 </span> 68/push 0x34/imm32
<span id="L130" class="LineNr">130 </span> ff 6/subop/push 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># push *ecx</span>
<span id="L131" class="LineNr">131 </span> <span class="subxS2Comment"># . . call</span>
<span id="L132" class="LineNr">132 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L133" class="LineNr">133 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L134" class="LineNr">134 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L135" class="LineNr">135 </span> <span class="subxComment"># check-ints-equal(*handle-&gt;address, 0x34, msg)</span>
<span id="L136" class="LineNr">136 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L137" class="LineNr">137 </span> 68/push <span class="Constant">&quot;F - <a href='handle.subx.html#L95'>test-new</a>: alloc id of payload&quot;</span>/imm32
<span id="L138" class="LineNr">138 </span> 68/push 0x34/imm32
<span id="L139" class="LineNr">139 </span> 8b/copy 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ecx+4) to edx</span>
<span id="L140" class="LineNr">140 </span> ff 6/subop/push 0/mod/indirect 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># push *edx</span>
<span id="L141" class="LineNr">141 </span> <span class="subxS2Comment"># . . call</span>
<span id="L142" class="LineNr">142 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L143" class="LineNr">143 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L144" class="LineNr">144 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L145" class="LineNr">145 </span> <span class="subxComment"># check-ints-equal(*Next-alloc-id, 0x35)</span>
<span id="L146" class="LineNr">146 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L147" class="LineNr">147 </span> 68/push <span class="Constant">&quot;F - <a href='handle.subx.html#L95'>test-new</a>: next alloc id&quot;</span>/imm32
<span id="L148" class="LineNr">148 </span> 68/push 0x35/imm32
<span id="L149" class="LineNr">149 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L150" class="LineNr">150 </span> <span class="subxS2Comment"># . . call</span>
<span id="L151" class="LineNr">151 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L152" class="LineNr">152 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L153" class="LineNr">153 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L154" class="LineNr">154 </span> <span class="subxComment"># clean up</span>
<span id="L155" class="LineNr">155 </span> <span class="subxS1Comment"># . *Next-alloc-id = 1</span>
<span id="L156" class="LineNr">156 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 1/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L157" class="LineNr">157 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L158" class="LineNr">158 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L159" class="LineNr">159 </span> 5d/pop-to-ebp
<span id="L160" class="LineNr">160 </span> c3/return
<span id="L161" class="LineNr">161 </span>
<span id="L162" class="LineNr">162 </span><span class="subxMinorFunction">_pending-test-new-failure</span>:
<span id="L163" class="LineNr">163 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L164" class="LineNr">164 </span> 55/push-ebp
<span id="L165" class="LineNr">165 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L166" class="LineNr">166 </span> <span class="subxS1Comment"># . *Next-alloc-id = 0x34</span>
<span id="L167" class="LineNr">167 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 0x34/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L168" class="LineNr">168 </span> <span class="subxComment"># define an allocation-descriptor with no space left</span>
<span id="L169" class="LineNr">169 </span> <span class="subxS1Comment"># . var ad/eax: allocation-descriptor = {0x10, 0x10}</span>
<span id="L170" class="LineNr">170 </span> 68/push 0x10/imm32/limit
<span id="L171" class="LineNr">171 </span> 68/push 0x10/imm32/curr
<span id="L172" class="LineNr">172 </span> 89/copy 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to eax</span>
<span id="L173" class="LineNr">173 </span> <span class="subxS1Comment"># . var handle/ecx = {random, random}</span>
<span id="L174" class="LineNr">174 </span> 68/push 1234/imm32/address
<span id="L175" class="LineNr">175 </span> 68/push 5678/imm32/alloc-id
<span id="L176" class="LineNr">176 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ecx</span>
<span id="L177" class="LineNr">177 </span> <span class="subxComment"># try to allocate</span>
<span id="L178" class="LineNr">178 </span> <span class="subxS1Comment"># . new(ad, 2, handle/ecx)</span>
<span id="L179" class="LineNr">179 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L180" class="LineNr">180 </span> 51/push-ecx
<span id="L181" class="LineNr">181 </span> 68/push 2/imm32/size
<span id="L182" class="LineNr">182 </span> 50/push-eax
<span id="L183" class="LineNr">183 </span> <span class="subxS2Comment"># . . call</span>
<span id="L184" class="LineNr">184 </span> e8/call <a href='handle.subx.html#L47'>new</a>/disp32
<span id="L185" class="LineNr">185 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L186" class="LineNr">186 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L187" class="LineNr">187 </span> <span class="subxComment"># handle should be cleared</span>
<span id="L188" class="LineNr">188 </span> <span class="subxS1Comment"># . check-ints-equal(handle-&gt;alloc_id, 0, msg)</span>
<span id="L189" class="LineNr">189 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L190" class="LineNr">190 </span> 68/push <span class="Constant">&quot;F - test-new-failure: alloc id of handle&quot;</span>/imm32
<span id="L191" class="LineNr">191 </span> 68/push 0/imm32
<span id="L192" class="LineNr">192 </span> ff 6/subop/push 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># push *ecx</span>
<span id="L193" class="LineNr">193 </span> <span class="subxS2Comment"># . . call</span>
<span id="L194" class="LineNr">194 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L195" class="LineNr">195 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L196" class="LineNr">196 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L197" class="LineNr">197 </span> <span class="subxS1Comment"># . check-ints-equal(handle-&gt;address, 0, msg)</span>
<span id="L198" class="LineNr">198 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L199" class="LineNr">199 </span> 68/push <span class="Constant">&quot;F - test-new-failure: address of handle&quot;</span>/imm32
<span id="L200" class="LineNr">200 </span> 68/push 0/imm32
<span id="L201" class="LineNr">201 </span> ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ecx+4)</span>
<span id="L202" class="LineNr">202 </span> <span class="subxS2Comment"># . . call</span>
<span id="L203" class="LineNr">203 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L204" class="LineNr">204 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L205" class="LineNr">205 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L206" class="LineNr">206 </span> <span class="subxComment"># Next-alloc-id should be unmodified</span>
<span id="L207" class="LineNr">207 </span> <span class="subxS1Comment"># . check-ints-equal(*Next-alloc-id, 0x34)</span>
<span id="L208" class="LineNr">208 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L209" class="LineNr">209 </span> 68/push <span class="Constant">&quot;F - test-new-failure: next alloc id&quot;</span>/imm32
<span id="L210" class="LineNr">210 </span> 68/push 0x34/imm32
<span id="L211" class="LineNr">211 </span> ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L212" class="LineNr">212 </span> <span class="subxS2Comment"># . . call</span>
<span id="L213" class="LineNr">213 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L214" class="LineNr">214 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L215" class="LineNr">215 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L216" class="LineNr">216 </span> <span class="subxComment"># clean up</span>
<span id="L217" class="LineNr">217 </span> <span class="subxS1Comment"># . *Next-alloc-id = 1</span>
<span id="L218" class="LineNr">218 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 1/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L219" class="LineNr">219 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L220" class="LineNr">220 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L221" class="LineNr">221 </span> 5d/pop-to-ebp
<span id="L222" class="LineNr">222 </span> c3/return
<span id="L223" class="LineNr">223 </span>
<span id="L224" class="LineNr">224 </span><span class="subxFunction">lookup</span>: <span class="subxComment"># h: (handle T) -&gt; eax: (addr T)</span>
<span id="L225" class="LineNr">225 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L226" class="LineNr">226 </span> 55/push-ebp
<span id="L227" class="LineNr">227 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L228" class="LineNr">228 </span> <span class="subxH1Comment"># - as a proof of concept for future inlining, uses no general-purpose registers besides the output (eax)</span>
<span id="L229" class="LineNr">229 </span> <span class="subxComment"># eax = handle</span>
<span id="L230" class="LineNr">230 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to eax</span>
<span id="L231" class="LineNr">231 </span> <span class="subxH1Comment"># - inline {</span>
<span id="L232" class="LineNr">232 </span> <span class="subxComment"># push handle-&gt;alloc_id</span>
<span id="L233" class="LineNr">233 </span> ff 6/subop/push 0/mod/indirect 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># push *eax</span>
<span id="L234" class="LineNr">234 </span> <span class="subxComment"># eax = handle-&gt;address (payload)</span>
<span id="L235" class="LineNr">235 </span> 8b/copy 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(eax+4) to eax</span>
<span id="L236" class="LineNr">236 </span> <span class="subxComment"># push handle-&gt;address</span>
<span id="L237" class="LineNr">237 </span> 50/push-eax
<span id="L238" class="LineNr">238 </span> <span class="subxComment"># eax = payload-&gt;alloc_id</span>
<span id="L239" class="LineNr">239 </span> 8b/copy 0/mod/indirect 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *eax to eax</span>
<span id="L240" class="LineNr">240 </span> <span class="subxComment"># if (eax != handle-&gt;alloc_id) abort</span>
<span id="L241" class="LineNr">241 </span> 39/compare 1/mod/*+disp8 4/rm32/sib 4/base/esp 4/index/none <span class="Normal"> . </span> 0/r32/eax 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># compare *(esp+4) and eax</span>
<span id="L242" class="LineNr">242 </span> 75/jump-if-!= $lookup:abort/disp8
<span id="L243" class="LineNr">243 </span> <span class="subxComment"># eax = pop handle-&gt;address</span>
<span id="L244" class="LineNr">244 </span> 58/pop-to-eax
<span id="L245" class="LineNr">245 </span> <span class="subxComment"># discard handle-&gt;alloc_id</span>
<span id="L246" class="LineNr">246 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L247" class="LineNr">247 </span> <span class="subxComment"># add 4</span>
<span id="L248" class="LineNr">248 </span> 05/add-to-eax 4/imm32
<span id="L249" class="LineNr">249 </span> <span class="subxH1Comment"># - }</span>
<span id="L250" class="LineNr">250 </span> <span class="subxH1Comment"># - alternative consuming a second register {</span>
<span id="L251" class="LineNr">251 </span><span class="CommentedCode">#? # ecx = handle-&gt;alloc_id</span>
<span id="L252" class="LineNr">252 </span><span class="CommentedCode">#? 8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx</span>
<span id="L253" class="LineNr">253 </span><span class="CommentedCode">#? # eax = handle-&gt;address (payload)</span>
<span id="L254" class="LineNr">254 </span><span class="CommentedCode">#? 8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax</span>
<span id="L255" class="LineNr">255 </span><span class="CommentedCode">#? # if (ecx != *eax) abort</span>
<span id="L256" class="LineNr">256 </span><span class="CommentedCode">#? 39/compare 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # compare *eax and ecx</span>
<span id="L257" class="LineNr">257 </span><span class="CommentedCode">#? 75/jump-if-!= $lookup:abort/disp8</span>
<span id="L258" class="LineNr">258 </span><span class="CommentedCode">#? # add 4 to eax</span>
<span id="L259" class="LineNr">259 </span><span class="CommentedCode">#? 05/add-to-eax 4/imm32</span>
<span id="L260" class="LineNr">260 </span> <span class="subxH1Comment"># - }</span>
<span id="L261" class="LineNr">261 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L262" class="LineNr">262 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L263" class="LineNr">263 </span> 5d/pop-to-ebp
<span id="L264" class="LineNr">264 </span> c3/return
<span id="L265" class="LineNr">265 </span>
<span id="L266" class="LineNr">266 </span><span class="Constant">$lookup:abort</span>:
<span id="L267" class="LineNr">267 </span> <span class="subxS1Comment"># . _write(2/stderr, msg)</span>
<span id="L268" class="LineNr">268 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L269" class="LineNr">269 </span> 68/push <span class="Constant">&quot;lookup failed\n&quot;</span>/imm32
<span id="L270" class="LineNr">270 </span> 68/push 2/imm32/stderr
<span id="L271" class="LineNr">271 </span> <span class="subxS2Comment"># . . call</span>
<span id="L272" class="LineNr">272 </span> e8/call <a href='../050_write.subx.html#L14'>_write</a>/disp32
<span id="L273" class="LineNr">273 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L274" class="LineNr">274 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L275" class="LineNr">275 </span> <span class="subxS1Comment"># . syscall(exit, 1)</span>
<span id="L276" class="LineNr">276 </span> bb/copy-to-ebx 1/imm32/exit-status
<span id="L277" class="LineNr">277 </span> b8/copy-to-eax 1/imm32/exit
<span id="L278" class="LineNr">278 </span> cd/syscall 0x80/imm8
<span id="L279" class="LineNr">279 </span>
<span id="L280" class="LineNr">280 </span><span class="subxTest">test-lookup-success</span>:
<span id="L281" class="LineNr">281 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L282" class="LineNr">282 </span> 55/push-ebp
<span id="L283" class="LineNr">283 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L284" class="LineNr">284 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L285" class="LineNr">285 </span> <span class="subxComment"># var heap/ebx: allocation-descriptor</span>
<span id="L286" class="LineNr">286 </span> 68/push 0/imm32/limit
<span id="L287" class="LineNr">287 </span> 68/push 0/imm32/curr
<span id="L288" class="LineNr">288 </span> 89/copy 3/mod/direct 3/rm32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebx</span>
<span id="L289" class="LineNr">289 </span> <span class="subxComment"># heap = new-segment(512)</span>
<span id="L290" class="LineNr">290 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L291" class="LineNr">291 </span> 53/push-ebx
<span id="L292" class="LineNr">292 </span> 68/push 0x200/imm32
<span id="L293" class="LineNr">293 </span> <span class="subxS2Comment"># . . call</span>
<span id="L294" class="LineNr">294 </span> e8/call <a href='../053new-segment.subx.html#L41'>new-segment</a>/disp32
<span id="L295" class="LineNr">295 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L296" class="LineNr">296 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L297" class="LineNr">297 </span> <span class="subxComment"># var handle/ecx: handle</span>
<span id="L298" class="LineNr">298 </span> 68/push 0/imm32/address
<span id="L299" class="LineNr">299 </span> 68/push 0/imm32/alloc-id
<span id="L300" class="LineNr">300 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ecx</span>
<span id="L301" class="LineNr">301 </span> <span class="subxComment"># var old_top/edx = heap-&gt;curr</span>
<span id="L302" class="LineNr">302 </span> 8b/copy 0/mod/indirect 3/rm32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ebx to edx</span>
<span id="L303" class="LineNr">303 </span> <span class="subxComment"># new(heap, 2, handle)</span>
<span id="L304" class="LineNr">304 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L305" class="LineNr">305 </span> 51/push-ecx
<span id="L306" class="LineNr">306 </span> 68/push 2/imm32/size
<span id="L307" class="LineNr">307 </span> 53/push-ebx
<span id="L308" class="LineNr">308 </span> <span class="subxS2Comment"># . . call</span>
<span id="L309" class="LineNr">309 </span> e8/call <a href='handle.subx.html#L47'>new</a>/disp32
<span id="L310" class="LineNr">310 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L311" class="LineNr">311 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L312" class="LineNr">312 </span> <span class="subxComment"># eax = lookup(handle)</span>
<span id="L313" class="LineNr">313 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L314" class="LineNr">314 </span> 51/push-ecx
<span id="L315" class="LineNr">315 </span> <span class="subxS2Comment"># . . call</span>
<span id="L316" class="LineNr">316 </span> e8/call <a href='handle.subx.html#L224'>lookup</a>/disp32
<span id="L317" class="LineNr">317 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L318" class="LineNr">318 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L319" class="LineNr">319 </span> <span class="subxComment"># eax contains old top of heap, except skipping the alloc id in the payload</span>
<span id="L320" class="LineNr">320 </span> <span class="subxS1Comment"># . check-ints-equal(eax, old_top+4, msg)</span>
<span id="L321" class="LineNr">321 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L322" class="LineNr">322 </span> 68/push <span class="Constant">&quot;F - test-lookup-success&quot;</span>/imm32
<span id="L323" class="LineNr">323 </span> 81 0/subop/add 3/mod/direct 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to edx</span>
<span id="L324" class="LineNr">324 </span> 52/push-edx
<span id="L325" class="LineNr">325 </span> 50/push-eax
<span id="L326" class="LineNr">326 </span> <span class="subxS2Comment"># . . call</span>
<span id="L327" class="LineNr">327 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L328" class="LineNr">328 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L329" class="LineNr">329 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L330" class="LineNr">330 </span> <span class="subxComment"># clean up</span>
<span id="L331" class="LineNr">331 </span> <span class="subxS1Comment"># . *Next-alloc-id = 1</span>
<span id="L332" class="LineNr">332 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 1/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L333" class="LineNr">333 </span> <span class="subxComment"># write(2/stderr, &quot;lookup succeeded\n&quot;)</span>
<span id="L334" class="LineNr">334 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L335" class="LineNr">335 </span> 68/push <span class="Constant">&quot;lookup succeeded\n&quot;</span>/imm32
<span id="L336" class="LineNr">336 </span> 68/push 2/imm32/stderr
<span id="L337" class="LineNr">337 </span> <span class="subxS2Comment"># . . call</span>
<span id="L338" class="LineNr">338 </span> e8/call <a href='../057write.subx.html#L24'>write</a>/disp32
<span id="L339" class="LineNr">339 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L340" class="LineNr">340 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L341" class="LineNr">341 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L342" class="LineNr">342 </span> 5a/pop-to-edx
<span id="L343" class="LineNr">343 </span> 59/pop-to-ecx
<span id="L344" class="LineNr">344 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L345" class="LineNr">345 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L346" class="LineNr">346 </span> 5d/pop-to-ebp
<span id="L347" class="LineNr">347 </span> c3/return
<span id="L348" class="LineNr">348 </span>
<span id="L349" class="LineNr">349 </span><span class="subxTest">test-lookup-failure</span>:
<span id="L350" class="LineNr">350 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L351" class="LineNr">351 </span> 55/push-ebp
<span id="L352" class="LineNr">352 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L353" class="LineNr">353 </span> <span class="subxComment"># var heap/esi: allocation-descriptor</span>
<span id="L354" class="LineNr">354 </span> 68/push 0/imm32/limit
<span id="L355" class="LineNr">355 </span> 68/push 0/imm32/curr
<span id="L356" class="LineNr">356 </span> 89/copy 3/mod/direct 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to esi</span>
<span id="L357" class="LineNr">357 </span> <span class="subxComment"># heap = new-segment(512)</span>
<span id="L358" class="LineNr">358 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L359" class="LineNr">359 </span> 56/push-esi
<span id="L360" class="LineNr">360 </span> 68/push 0x200/imm32
<span id="L361" class="LineNr">361 </span> <span class="subxS2Comment"># . . call</span>
<span id="L362" class="LineNr">362 </span> e8/call <a href='../053new-segment.subx.html#L41'>new-segment</a>/disp32
<span id="L363" class="LineNr">363 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L364" class="LineNr">364 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span>
<span id="L365" class="LineNr">365 </span> <span class="subxComment"># var h1/ecx: handle</span>
<span id="L366" class="LineNr">366 </span> 68/push 0/imm32/address
<span id="L367" class="LineNr">367 </span> 68/push 0/imm32/alloc-id
<span id="L368" class="LineNr">368 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ecx</span>
<span id="L369" class="LineNr">369 </span> <span class="subxComment"># var old_top/ebx = heap-&gt;curr</span>
<span id="L370" class="LineNr">370 </span> 8b/copy 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *esi to ebx</span>
<span id="L371" class="LineNr">371 </span> <span class="subxComment"># first allocation, to h1</span>
<span id="L372" class="LineNr">372 </span> <span class="subxS1Comment"># . new(heap, 2, h1)</span>
<span id="L373" class="LineNr">373 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L374" class="LineNr">374 </span> 51/push-ecx
<span id="L375" class="LineNr">375 </span> 68/push 2/imm32/size
<span id="L376" class="LineNr">376 </span> 56/push-esi
<span id="L377" class="LineNr">377 </span> <span class="subxS2Comment"># . . call</span>
<span id="L378" class="LineNr">378 </span> e8/call <a href='handle.subx.html#L47'>new</a>/disp32
<span id="L379" class="LineNr">379 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L380" class="LineNr">380 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L381" class="LineNr">381 </span> <span class="subxComment"># reset heap-&gt;curr to mimic reclamation</span>
<span id="L382" class="LineNr">382 </span> 89/copy 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebx to *esi</span>
<span id="L383" class="LineNr">383 </span> <span class="subxComment"># second allocation that returns the same address as the first</span>
<span id="L384" class="LineNr">384 </span> <span class="subxComment"># var h2/edx: handle</span>
<span id="L385" class="LineNr">385 </span> 68/push 0/imm32/address
<span id="L386" class="LineNr">386 </span> 68/push 0/imm32/alloc-id
<span id="L387" class="LineNr">387 </span> 89/copy 3/mod/direct 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to edx</span>
<span id="L388" class="LineNr">388 </span> <span class="subxS1Comment"># . new(heap, 2, h2)</span>
<span id="L389" class="LineNr">389 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L390" class="LineNr">390 </span> 52/push-edx
<span id="L391" class="LineNr">391 </span> 68/push 2/imm32/size
<span id="L392" class="LineNr">392 </span> 56/push-esi
<span id="L393" class="LineNr">393 </span> <span class="subxS2Comment"># . . call</span>
<span id="L394" class="LineNr">394 </span> e8/call <a href='handle.subx.html#L47'>new</a>/disp32
<span id="L395" class="LineNr">395 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L396" class="LineNr">396 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L397" class="LineNr">397 </span> <span class="subxComment"># check-ints-equal(h1-&gt;address, h2-&gt;address, msg)</span>
<span id="L398" class="LineNr">398 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L399" class="LineNr">399 </span> 68/push <span class="Constant">&quot;F - test-lookup-failure&quot;</span>/imm32
<span id="L400" class="LineNr">400 </span> ff 6/subop/push 1/mod/*+disp8 2/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(edx+4)</span>
<span id="L401" class="LineNr">401 </span> ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ecx+4)</span>
<span id="L402" class="LineNr">402 </span> <span class="subxS2Comment"># . . call</span>
<span id="L403" class="LineNr">403 </span> e8/call <a href='../051test.subx.html#L24'>check-ints-equal</a>/disp32
<span id="L404" class="LineNr">404 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L405" class="LineNr">405 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L406" class="LineNr">406 </span> <span class="subxComment"># lookup(h1) should crash</span>
<span id="L407" class="LineNr">407 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L408" class="LineNr">408 </span> 51/push-ecx
<span id="L409" class="LineNr">409 </span> <span class="subxS2Comment"># . . call</span>
<span id="L410" class="LineNr">410 </span> e8/call <a href='handle.subx.html#L224'>lookup</a>/disp32
<span id="L411" class="LineNr">411 </span> <span class="subxComment"># should never get past this point</span>
<span id="L412" class="LineNr">412 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L413" class="LineNr">413 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span>
<span id="L414" class="LineNr">414 </span> <span class="subxComment"># clean up</span>
<span id="L415" class="LineNr">415 </span> <span class="subxS1Comment"># . *Next-alloc-id = 1</span>
<span id="L416" class="LineNr">416 </span> c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="SpecialChar"><a href='handle.subx.html#L425'>Next-alloc-id</a></span>/disp32 1/imm32 <span class="subxComment"># copy to *Next-alloc-id</span>
<span id="L417" class="LineNr">417 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L418" class="LineNr">418 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L419" class="LineNr">419 </span> 5d/pop-to-ebp
<span id="L420" class="LineNr">420 </span> c3/return
<span id="L421" class="LineNr">421 </span>
<span id="L422" class="LineNr">422 </span>== data
<span id="L423" class="LineNr">423 </span>
<span id="L424" class="LineNr">424 </span><span class="subxComment"># Monotonically increasing counter for calls to 'new'</span>
<span id="L425" class="LineNr">425 </span><span class="SpecialChar">Next-alloc-id</span>: <span class="subxComment"># int</span>
<span id="L426" class="LineNr">426 </span> 1/imm32
<span id="L427" class="LineNr">427 </span>
<span id="L428" class="LineNr">428 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->

3
stats.txt
View File

@ -3,7 +3,6 @@
apps/factorial.subx 120 44
apps/crenshaw2-1.subx 561 180
apps/crenshaw2-1b.subx 757 186
apps/handle.subx 428 44
apps/hex.subx 1442 149
apps/survey.subx 4733 905
apps/pack.subx 5881 840
@ -20,7 +19,6 @@ apps/mu.subx (incomplete) 11592 4165
apps/factorial.subx 8436 1700
apps/crenshaw2-1.subx 8644 1925
apps/crenshaw2-1b.subx 8736 1931
apps/handle.subx 8601 1638
apps/hex.subx 9065 1908
apps/survey.subx 10217 3248
apps/pack.subx 10589 2727
@ -37,7 +35,6 @@ apps/mu.subx (incomplete) 16250 6524
apps/crenshaw2-1 41 4.3
apps/crenshaw2-1b 42 5.2
apps/factorial 42 5.2
apps/handle 42 4.2
apps/hex 45 5.0
apps/survey 51 9.6
apps/pack 54 7.6

16
test_apps
View File

@ -221,20 +221,6 @@ test $NATIVE && {
echo
}
echo handle
./bootstrap translate init.$OS 0[0-8]*.subx apps/handle.subx -o apps/handle
test "$1" = 'record' || git diff --exit-code apps/handle
test $EMULATED && {
./bootstrap run apps/handle > handle.out 2>&1 || true
grep -q 'lookup succeeded' handle.out || { echo "missing success test"; exit 1; }
grep -q 'lookup failed' handle.out || { echo "missing failure test"; exit 1; }
}
test $NATIVE && {
apps/handle > handle.out 2>&1 || true
grep -q 'lookup succeeded' handle.out || { echo "missing success test"; exit 1; }
grep -q 'lookup failed' handle.out || { echo "missing failure test"; exit 1; }
}
# Phases of the self-hosted SubX translator.
for phase in hex survey pack assort dquotes tests
@ -324,7 +310,7 @@ done
# Larger apps that use the standard library.
for app in factorial crenshaw2-1 crenshaw2-1b handle
for app in factorial crenshaw2-1 crenshaw2-1b
do
echo $app
./translate_subx init.$OS 0[0-8]*.subx apps/$app.subx