141 lines
7.2 KiB
Plaintext
141 lines
7.2 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
|
|
|
|
# print 'arr' in hex with a space after every byte
|
|
emit-hex-array: # out: (addr buffered-file), arr: (addr array byte)
|
|
# . 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
|
|
57/push-edi
|
|
# edi = out
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 7/r32/edi 8/disp8 . # copy *(ebp+8) to edi
|
|
# edx = arr
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 0xc/disp8 . # copy *(ebp+12) to edx
|
|
# var curr/ecx: (addr byte) = arr->data
|
|
8d/copy-address 1/mod/*+disp8 2/rm32/edx . . . 1/r32/ecx 4/disp8 . # copy edx+4 to ecx
|
|
# var max/edx: (addr byte) = &arr->data[arr->size]
|
|
8b/copy 0/mod/indirect 2/rm32/edx . . . 2/r32/edx . . # copy *edx to edx
|
|
01/add 3/mod/direct 2/rm32/edx . . . 1/r32/ecx . . # add ecx to edx
|
|
# var c/eax: byte = 0
|
|
31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax
|
|
$emit-hex-array:loop:
|
|
# if (curr >= width) break
|
|
39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
|
|
73/jump-if-addr>= $emit-hex-array:end/disp8
|
|
# emit-hex(out, c = *curr, width=1)
|
|
# . . push args
|
|
68/push 1/imm32/width
|
|
8a/copy-byte 0/mod/indirect 1/rm32/ecx . . . 0/r32/AL . . # copy byte at *ecx to AL
|
|
50/push-eax
|
|
57/push-edi
|
|
# . . call
|
|
e8/call emit-hex/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# ++curr
|
|
41/increment-ecx
|
|
eb/jump $emit-hex-array:loop/disp8
|
|
$emit-hex-array:end:
|
|
# . restore registers
|
|
5f/pop-to-edi
|
|
5a/pop-to-edx
|
|
59/pop-to-ecx
|
|
58/pop-to-eax
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
test-emit-hex-array:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# setup
|
|
# . clear-stream(_test-output-stream)
|
|
# . . push args
|
|
68/push _test-output-stream/imm32
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# . clear-stream($_test-output-buffered-file->buffer)
|
|
# . . push args
|
|
68/push $_test-output-buffered-file->buffer/imm32
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# var arr/ecx (array byte) = [01, 02, 03]
|
|
68/push 0x00030201/imm32 # bytes 01 02 03
|
|
68/push 3/imm32/size
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# emit-hex-array(_test-output-buffered-file, arr)
|
|
# . . push args
|
|
51/push-ecx
|
|
68/push _test-output-buffered-file/imm32
|
|
# . . call
|
|
e8/call emit-hex-array/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . flush(_test-output-buffered-file)
|
|
# . . push args
|
|
68/push _test-output-buffered-file/imm32
|
|
# . . call
|
|
e8/call flush/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
#? # dump output {{{
|
|
#? # . write(2/stderr, "result: ^")
|
|
#? # . . push args
|
|
#? 68/push "result: ^"/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
#? # . write-stream(2/stderr, _test-output-stream)
|
|
#? # . . push args
|
|
#? 68/push _test-output-stream/imm32
|
|
#? 68/push 2/imm32/stderr
|
|
#? # . . call
|
|
#? e8/call write-stream/disp32
|
|
#? # . . discard args
|
|
#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
#? # . write(2/stderr, "$\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, "01 02 03 ", msg)
|
|
# . . push args
|
|
68/push "F - test-emit-hex-array"/imm32
|
|
68/push "01 02 03 "/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
|
|
|
|
# . . vim:nowrap:textwidth=0
|