survey_baremetal: padding between segments

Optional.
This commit is contained in:
Kartik K. Agaram 2021-03-14 19:33:11 -07:00
parent 1dc1a65ea0
commit 6525ccc8ec
2 changed files with 552 additions and 10 deletions

Binary file not shown.

View File

@ -6,8 +6,12 @@
# $ bootstrap/bootstrap translate [01]*.subx apps/subx-params.subx apps/survey_baremetal.subx -o apps/survey_baremetal
#
# The expected input is a stream of bytes and some interspersed labels.
# Comments and '==' segment headers are allowed, but ignored. The emitted code
# will all lie in a single header, and start at address 0x9400.
# Comments and '==' segment headers are allowed, but names are ignored. The
# emitted code will all lie in a single contiguous address range starting at
# address 0x9400. Addresses in segment headers are optional. If provided, this
# program will insert padding in the output until the desired address is
# reached.
#
# $ cat x
# == code
# l1:
@ -15,9 +19,9 @@
# cc dd l2/disp32
# l2:
# ee foo/imm32
# == data
# == data 0x9410
# foo:
# 00
# 34
#
# The output is the stream of bytes without segment headers or label definitions,
# and with label references replaced with numeric values/displacements.
@ -28,7 +32,9 @@
# cc dd nn nn nn nn # some computed displacement
# ee nn nn nn nn # address right after this instruction
# # 0x940e
# 00 # data segment interleaved with code
# 00 00 # padding
# # 0x9410
# 34 # data segment interleaved with code
== code
# instruction effective address register displacement immediate
@ -72,6 +78,7 @@ Entry: # run tests if necessary, convert stdin if not
3d/compare-eax-and 0/imm32/false
74/jump-if-= $subx-survey-main:interactive/disp8
# run-tests()
#? e8/call test-emit-output-with-padding/disp32
e8/call run-tests/disp32
# syscall(exit, *Num-test-failures)
8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/ebx Num-test-failures/disp32 # copy *Num-test-failures to ebx
@ -320,6 +327,138 @@ test-subx-survey-computes-addresses:
5d/pop-to-ebp
c3/return
test-subx-survey-computes-addresses-with-padding:
# input:
# == code
# ab x/imm32
# == data 0x9410
# x:
# 01
#
# trace contains (in any order):
# label x is at address 0x9410
#
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# setup
# . clear-stream(_test-input-stream)
# . . push args
68/push _test-input-stream/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . clear-stream($_test-input-buffered-file->buffer)
# . . push args
68/push $_test-input-buffered-file->buffer/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . clear-stream(_test-output-stream)
# . . push args
68/push _test-output-stream/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . clear-stream($_test-output-buffered-file->buffer)
# . . push args
68/push $_test-output-buffered-file->buffer/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# initialize input
# . write(_test-input-stream, "== code\n")
# . . push args
68/push "== code\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write(_test-input-stream, "ab x/imm32\n")
# . . push args
68/push "ab x/imm32\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write(_test-input-stream, "== data\n")
# . . push args
68/push "== data 0x9410\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write(_test-input-stream, "x:\n")
# . . push args
68/push "x:\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write(_test-input-stream, "01\n")
# . . push args
68/push "01\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# subx-survey(_test-input-buffered-file, _test-output-buffered-file)
# . . push args
68/push _test-output-buffered-file/imm32
68/push _test-input-buffered-file/imm32
# . . call
e8/call subx-survey/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# check trace
#? # dump *Trace-stream {{{
#? # . write(2/stderr, "^")
#? # . . push args
#? 68/push "^"/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
#? # . write-stream(2/stderr, *Trace-stream)
#? # . . push args
#? ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Trace-stream/disp32 # push *Trace-stream
#? 68/push 2/imm32/stderr
#? # . . call
#? e8/call write-stream/disp32
#? # . . discard args
#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
#? # . write(2/stderr, "$\n")
#? # . . push args
#? 68/push "$\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
#? # }}}
# . check-trace-contains("label 'x' is at address 0x00009410.", msg)
# . . push args
68/push "F - test-subx-survey-computes-addresses-with-padding/0"/imm32
68/push "label 'x' is at address 0x00009410."/imm32
# . . call
e8/call check-trace-contains/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
compute-offsets: # in: (addr stream byte), labels: (addr stream {(handle array byte), address})
# pseudocode:
# var current-address = 0x9400
@ -334,8 +473,17 @@ compute-offsets: # in: (addr stream byte), labels: (addr stream {(handle array
# break
# else if slice-starts-with?(word-slice, "#") # comment
# break # end of line
# else if slice-equal?(word-slice, "==") # no need for segment header
# break
# else if slice-equal?(word-slice, "==") # segment header
# word-slice = next-word(line)
# if slice-empty?(word-slice)
# abort
# word-slice = next-word(line) # segment address
# if slice-empty?(word-slice)
# goto line-loop # segment address is optional
# new-address = parse-hex-int-from-slice(word-slice)
# if new-address < current-address
# abort
# current-address = new-address
# else if label?(word-slice)
# strip trailing ':' from word-slice
# trace("label '" word-slice "' is at address " current-address ".")
@ -453,7 +601,7 @@ $compute-offsets:case-comment:
3d/compare-eax-and 0/imm32/false
0f 85/jump-if-!= $compute-offsets:line-loop/disp32
$compute-offsets:case-segment-header:
# if slice-equal?(word-slice, "==") break
# if !slice-equal?(word-slice, "==") goto next case
# . eax = slice-equal?(word-slice, "==")
# . . push args
68/push "=="/imm32
@ -464,7 +612,59 @@ $compute-offsets:case-segment-header:
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . if (eax != false) break
3d/compare-eax-and 0/imm32/false
0f 84/jump-if-= $compute-offsets:case-label/disp32
# next-word(line, word-slice)
# . . push args
52/push-edx
51/push-ecx
# . . call
e8/call next-word/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# if slice-empty?(word-slice) abort
# . eax = slice-empty?(word-slice)
# . . push args
52/push-edx
# . . call
e8/call slice-empty?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . if (eax != false) abort
3d/compare-eax-and 0/imm32/false
0f 85/jump-if-!= $compute-offsets:abort/disp32
# next-word(line, word-slice)
# . . push args
52/push-edx
51/push-ecx
# . . call
e8/call next-word/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# if slice-empty?(word-slice) break
# . eax = slice-empty?(word-slice)
# . . push args
52/push-edx
# . . call
e8/call slice-empty?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . if (eax != false) break
3d/compare-eax-and 0/imm32/false
0f 85/jump-if-!= $compute-offsets:line-loop/disp32
# var new-address/eax: int = parse-hex-int-from-slice(word-slice)
# . . push args
52/push-edx
# . . call
e8/call parse-hex-int-from-slice/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# if (new-address < current-address) abort
39/compare 3/mod/direct 0/rm32/eax . . . 6/r32/esi . . # compare eax with esi
0f 82/jump-if-addr< $compute-offsets:error-bad-segment-address/disp32
# current-address = new-address
89/copy 3/mod/direct 6/rm32/esi . . . 0/r32/eax . . # copy eax to esi
# break
e9/jump $compute-offsets:line-loop/disp32
$compute-offsets:case-label:
# if (!label?(word-slice)) goto next case
# . eax = label?(word-slice)
@ -571,6 +771,34 @@ $compute-offsets:end:
5d/pop-to-ebp
c3/return
$compute-offsets:abort:
# . _write(2/stderr, error)
# . . push args
68/push "'==' must be followed by segment name and optionally an address\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
e8/call syscall_exit/disp32
# never gets here
$compute-offsets:error-bad-segment-address:
# . _write(2/stderr, error)
# . . push args
68/push "'==' specifies an address that implies negative padding\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
e8/call syscall_exit/disp32
# never gets here
test-compute-offsets:
# input:
# == code
@ -737,8 +965,16 @@ emit-output: # in: (addr stream byte), out: (addr buffered-file), labels: (addr
# if label?(word-slice) # no need for label declarations anymore
# goto line-loop # don't insert empty lines
# if slice-equal?(word-slice, "==") # no need for segment header lines
# write-buffered(out, "# " address-of-next-instruction "\n")
# goto line-loop # don't insert empty lines
# word-slice = next-word(line) # skip segment name
# word-slice = next-word(line)
# if !slice-empty?(word-slice)
# new-address = parse-hex-int-from-slice(word-slice)
# write-buffered(out, "# " address-of-next-instruction "\n")
# while address-of-next-instruction < new-address
# write-buffered("00")
# ++address-of-next-instruction
# write-buffered(out, "# " address-of-next-instruction "\n")
# goto line-loop # don't insert empty lines
# if length(word-slice) == 2
# write-slice-buffered(out, word-slice)
# write-buffered(out, " ")
@ -958,6 +1194,107 @@ $emit-output:check-for-segment-header:
# . if (eax == false) goto next check
3d/compare-eax-and 0/imm32/false
0f 84/jump-if-= $emit-output:2-character/disp32
# skip segment name
# . next-word(line, word-slice)
# . . push args
52/push-edx
51/push-ecx
# . . call
e8/call next-word/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# compute segment address if it exists
# . next-word(line, word-slice)
# . . push args
52/push-edx
51/push-ecx
# . . call
e8/call next-word/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . if slice-empty?(word-slice) goto padding-done
# . . push args
52/push-edx
# . . call
e8/call slice-empty?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . .
3d/compare-eax-and 0/imm32/false
0f 85/jump-if-!= $emit-output:padding-done/disp32
# . var new-address/eax: int = parse-hex-int-from-slice(word-slice)
# . . push args
52/push-edx
# . . call
e8/call parse-hex-int-from-slice/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# write-buffered(out, "# " address-of-next-instruction "\n")
# . write-buffered(out, "# ")
# . . push args
68/push "# "/imm32
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
# . . call
e8/call write-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write-int32-hex-buffered(out, address-of-next-instruction)
# . . push args
53/push-ebx
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
# . . call
e8/call write-int32-hex-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write-buffered(out, "\n")
# . . push args
68/push Newline/imm32
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
# . . call
e8/call write-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
$emit-output:padding-loop:
# if (address-of-next-instruction >= new-address) goto padding-loop-done
39/compare 3/mod/direct 3/rm32/ebx . . . 0/r32/eax . . # compare ebx with eax
73/jump-if-addr>= $emit-output:padding-loop-done/disp8
# if (address-of-next-instruction % 8 == 0) write-buffered("\n")
53/push-ebx
81 4/subop/and 3/mod/direct 3/rm32/ebx . . . . . 7/imm32 # bitwise and of ebx
81 7/subop/compare 3/mod/direct 3/rm32/ebx . . . . . 0/imm32 # compare ebx
5b/pop-to-ebx
75/jump-if-!= $emit-output:padding-core/disp8
# . write-buffered(out, "\n")
# . . push args
68/push Newline/imm32
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
# . . call
e8/call write-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
$emit-output:padding-core:
# write-buffered("00")
# . . push args
68/push "00 "/imm32
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
# . . call
e8/call write-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# ++address-of-next-instruction
43/increment-ebx
# loop
eb/jump $emit-output:padding-loop/disp8
$emit-output:padding-loop-done:
# . write-buffered(out, "\n")
# . . push args
68/push Newline/imm32
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
# . . call
e8/call write-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
$emit-output:padding-done:
# write-buffered(out, "# " address-of-next-instruction "\n")
# . write-buffered(out, "# ")
# . . push args
@ -1525,6 +1862,211 @@ test-emit-output-non-far-control-flow:
5d/pop-to-ebp
c3/return
test-emit-output-with-padding:
# labels turn into absolute addresses if opcodes are not far jumps or calls
#
# input:
# in:
# == code
# ab cd ef gh
# == data 0x9410
# 34
#
# output:
# ab cd ef gh
# # 0x9404
# 00 00 00 00
# 00 00 00 00 00 00 00 00
# # 0x9410
# 34
#
# . prologue
55/push-ebp
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
# setup
# . clear-stream(_test-input-stream)
# . . push args
68/push _test-input-stream/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . clear-stream(_test-output-stream)
# . . push args
68/push _test-output-stream/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . clear-stream($_test-output-buffered-file->buffer)
# . . push args
68/push $_test-output-buffered-file->buffer/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . var labels/edx: (stream byte 8*24)
81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0xc0/imm32 # subtract from esp
68/push 0xc0/imm32/size
68/push 0/imm32/read
68/push 0/imm32/write
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
# . var h/ebx: (handle array byte)
68/push 0/imm32
68/push 0/imm32
89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx
# initialize input
# . write(_test-input-stream, "== code\n")
# . . push args
68/push "== code\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write(_test-input-stream, "ab cd ef gh\n")
# . . push args
68/push "ab cd ef gh\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write(_test-input-stream, "== data 0x9410\n")
# . . push args
68/push "== data 0x9410\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . write(_test-input-stream, "34\n")
# . . push args
68/push "34\n"/imm32
68/push _test-input-stream/imm32
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# component under test
# . emit-output(_test-input-stream, _test-output-buffered-file, labels)
# . . push args
52/push-edx
68/push _test-output-buffered-file/imm32
68/push _test-input-stream/imm32
# . . call
e8/call emit-output/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# checks
# . flush(_test-output-buffered-file)
# . . push args
68/push _test-output-buffered-file/imm32
# . . call
e8/call flush/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
#? # dump output {{{
#? # . write(2/stderr, "result: ^")
#? # . . push args
#? 68/push "result: ^"/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
#? # . write-stream(2/stderr, _test-output-stream)
#? # . . push args
#? 68/push _test-output-stream/imm32
#? 68/push 2/imm32/stderr
#? # . . call
#? e8/call write-stream/disp32
#? # . . discard args
#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
#? # . write(2/stderr, "$\n")
#? # . . push args
#? 68/push "$\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
#? # . rewind-stream(_test-output-stream)
#? # . . push args
#? 68/push _test-output-stream/imm32
#? # . . call
#? e8/call rewind-stream/disp32
#? # . . discard args
#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
#? # }}}
# . check-next-stream-line-equal(_test-output-stream, "# 0x00009400", msg)
# . . push args
68/push "F - test-emit-output-with-padding/0"/imm32
68/push "# 0x00009400"/imm32
68/push _test-output-stream/imm32
# . . call
e8/call check-next-stream-line-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . check-next-stream-line-equal(_test-output-stream, "ab cd ef gh ", msg)
# . . push args
68/push "F - test-emit-output-with-padding/1"/imm32
68/push "ab cd ef gh "/imm32
68/push _test-output-stream/imm32
# . . call
e8/call check-next-stream-line-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . check-next-stream-line-equal(_test-output-stream, "# 0x00009404", msg)
# . . push args
68/push "F - test-emit-output-with-padding/0"/imm32
68/push "# 0x00009404"/imm32
68/push _test-output-stream/imm32
# . . call
e8/call check-next-stream-line-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . check-next-stream-line-equal(_test-output-stream, "00 00 00 00 ", msg)
# . . push args
68/push "F - test-emit-output-with-padding/2"/imm32
68/push "00 00 00 00 "/imm32
68/push _test-output-stream/imm32
# . . call
e8/call check-next-stream-line-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . check-next-stream-line-equal(_test-output-stream, "00 00 00 00 ", msg)
# . . push args
68/push "F - test-emit-output-with-padding/3"/imm32
68/push "00 00 00 00 00 00 00 00 "/imm32
68/push _test-output-stream/imm32
# . . call
e8/call check-next-stream-line-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . check-next-stream-line-equal(_test-output-stream, "# 0x00009410", msg)
# . . push args
68/push "F - test-emit-output-with-padding/0"/imm32
68/push "# 0x00009410"/imm32
68/push _test-output-stream/imm32
# . . call
e8/call check-next-stream-line-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . check-next-stream-line-equal(_test-output-stream, "34 ", msg)
# . . push args
68/push "F - test-emit-output-with-padding/4"/imm32
68/push "34 "/imm32
68/push _test-output-stream/imm32
# . . call
e8/call check-next-stream-line-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . epilogue
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
5d/pop-to-ebp
c3/return
test-emit-output-code-label:
# labels turn into PC-relative addresses if opcodes are far jumps or calls
#