226 lines
12 KiB
Plaintext
226 lines
12 KiB
Plaintext
|
== 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
|
||
|
|
||
|
# main:
|
||
|
#? e8/call test-stream-data-equal/disp32
|
||
|
e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
|
||
|
# 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
|
||
|
|
||
|
# compare all the data in a stream (ignoring the read pointer)
|
||
|
stream-data-equal?: # f : (address stream), s : (address string) -> EAX : boolean
|
||
|
# . prolog
|
||
|
55/push-EBP
|
||
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
||
|
# . save registers
|
||
|
51/push-ECX
|
||
|
52/push-EDX
|
||
|
56/push-ESI
|
||
|
57/push-EDI
|
||
|
# ESI = f
|
||
|
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 8/disp8 . # copy *(EBP+8) to ESI
|
||
|
# max/EDX = f->data + f->write
|
||
|
8b/copy 0/mod/indirect 6/rm32/ESI . . . 0/r32/EAX . . # copy *ESI to EAX
|
||
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/ESI 0/index/EAX . 2/r32/EDX 0xc/disp8 . # copy ESI+EAX+12 to EDX
|
||
|
# currf/ESI = f->data
|
||
|
81 0/subop/add 3/mod/direct 6/rm32/ESI . . . . . 0xc/imm32 # add to ESI
|
||
|
# EDI = s
|
||
|
8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 7/r32/EDI 0xc/disp8 . # copy *(EBP+12) to EDI
|
||
|
# if (f->write != s->length) return false;
|
||
|
39/compare 0/mod/indirect 7/rm32/EDI . . . 0/r32/EAX . . # compare *EDI and EAX
|
||
|
75/jump-if-not-equal $stream-data-equal?:false/disp8
|
||
|
# currs/EDI = s->data
|
||
|
81 0/subop/add 3/mod/direct 7/rm32/EDI . . . . . 4/imm32 # add to EDI
|
||
|
# EAX = ECX = 0
|
||
|
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
|
||
|
31/xor 3/mod/direct 1/rm32/ECX . . . 1/r32/ECX . . # clear ECX
|
||
|
$stream-data-equal?:loop:
|
||
|
# if (curr >= max) return true
|
||
|
39/compare 3/mod/direct 6/rm32/ESI . . . 2/r32/EDX . . # compare ESI with EDX
|
||
|
7d/jump-if-greater-or-equal $stream-data-equal?:true/disp8
|
||
|
# AL = *s
|
||
|
8a/copy-byte 0/mod/indirect 6/rm32/ESI . . . 0/r32/AL . . # copy byte at *ESI to AL
|
||
|
# CL = *curr
|
||
|
8a/copy-byte 0/mod/indirect 7/rm32/EDI . . . 1/r32/CL . . # copy byte at *EDI to CL
|
||
|
# if (EAX != ECX) return false
|
||
|
39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX and ECX
|
||
|
75/jump-if-not-equal $stream-data-equal?:false/disp8
|
||
|
# ++f
|
||
|
46/increment-ESI
|
||
|
# ++curr
|
||
|
47/increment-EDI
|
||
|
eb/jump $stream-data-equal?:loop/disp8
|
||
|
$stream-data-equal?:false:
|
||
|
b8/copy-to-EAX 0/imm32
|
||
|
eb/jump $stream-data-equal?:end/disp8
|
||
|
$stream-data-equal?:true:
|
||
|
b8/copy-to-EAX 1/imm32
|
||
|
$stream-data-equal?:end:
|
||
|
# . restore registers
|
||
|
5f/pop-to-EDI
|
||
|
5e/pop-to-ESI
|
||
|
5a/pop-to-EDX
|
||
|
59/pop-to-ECX
|
||
|
# . epilog
|
||
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
||
|
5d/pop-to-EBP
|
||
|
c3/return
|
||
|
|
||
|
test-stream-data-equal:
|
||
|
# . prolog
|
||
|
55/push-EBP
|
||
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
||
|
# clear-stream(_test-stream)
|
||
|
# . . push args
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call clear-stream/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
||
|
# write(_test-stream, "Abc")
|
||
|
# . . push args
|
||
|
68/push "Abc"/imm32
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call write/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
||
|
# EAX = stream-data-equal?(_test-stream, "Abc")
|
||
|
# . . push args
|
||
|
68/push "Abc"/imm32
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call stream-data-equal?/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
||
|
# check-ints-equal(EAX, 1, msg)
|
||
|
# . . push args
|
||
|
68/push "F - test-stream-data-equal"/imm32
|
||
|
68/push 1/imm32
|
||
|
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
|
||
|
# . epilog
|
||
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
||
|
5d/pop-to-EBP
|
||
|
c3/return
|
||
|
|
||
|
test-stream-data-equal-2:
|
||
|
# . prolog
|
||
|
55/push-EBP
|
||
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
||
|
# clear-stream(_test-stream)
|
||
|
# . . push args
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call clear-stream/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
||
|
# write(_test-stream, "Abc")
|
||
|
# . . push args
|
||
|
68/push "Abc"/imm32
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call write/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
||
|
# EAX = stream-data-equal?(_test-stream, "Abd")
|
||
|
# . . push args
|
||
|
68/push "Abd"/imm32
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call stream-data-equal?/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
||
|
# check-ints-equal(EAX, 0, msg)
|
||
|
# . . push args
|
||
|
68/push "F - test-stream-data-equal-2"/imm32
|
||
|
68/push 0/imm32
|
||
|
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
|
||
|
# . epilog
|
||
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
||
|
5d/pop-to-EBP
|
||
|
c3/return
|
||
|
|
||
|
test-stream-data-equal-length-check:
|
||
|
# . prolog
|
||
|
55/push-EBP
|
||
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
||
|
# clear-stream(_test-stream)
|
||
|
# . . push args
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call clear-stream/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
|
||
|
# write(_test-stream, "Abc")
|
||
|
# . . push args
|
||
|
68/push "Abc"/imm32
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call write/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
||
|
# EAX = stream-data-equal?(_test-stream, "Abcd")
|
||
|
# . . push args
|
||
|
68/push "Abcd"/imm32
|
||
|
68/push _test-stream/imm32
|
||
|
# . . call
|
||
|
e8/call stream-data-equal?/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
||
|
# check-ints-equal(EAX, 0, msg)
|
||
|
# . . push args
|
||
|
68/push "F - test-stream-data-equal-length-check"/imm32
|
||
|
68/push 0/imm32
|
||
|
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
|
||
|
# . epilog
|
||
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
||
|
5d/pop-to-EBP
|
||
|
c3/return
|
||
|
|
||
|
# helper for tests
|
||
|
check-stream-equal: # f : (address stream), s : (address string), msg : (address string)
|
||
|
# . prolog
|
||
|
55/push-EBP
|
||
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
||
|
# . save registers
|
||
|
50/push-EAX
|
||
|
# EAX = stream-data-equal?(f, s)
|
||
|
# . . push args
|
||
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0xc/disp8 . # push *(EBP+12)
|
||
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 8/disp8 . # push *(EBP+8)
|
||
|
# . . call
|
||
|
e8/call stream-data-equal?/disp32
|
||
|
# . . discard args
|
||
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
|
||
|
# check-ints-equal(EAX, 1, msg)
|
||
|
# . . push args
|
||
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/EBP . . . . 0x10/disp8 . # push *(EBP+16)
|
||
|
68/push 1/imm32
|
||
|
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
|
||
|
# . restore registers
|
||
|
58/pop-to-EAX
|
||
|
# . epilog
|
||
|
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
|
||
|
5d/pop-to-EBP
|
||
|
c3/return
|