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| author | Kartik Agaram <vc@akkartik.com> | 2018-10-14 22:25:57 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-10-14 22:25:57 -0700 |
| commit | 6528a08992b3518c86628260c2318a792abaa6bd (patch) | |
| tree | c3125f2f254059ee978b2759f82dd5b4cd191c32 /subx/050write_stderr.subx | |
| parent | a9a5718d086d9df52b84b96a6ab4ee751dc26a5e (diff) | |
| download | mu-6528a08992b3518c86628260c2318a792abaa6bd.tar.gz | |
4699
Diffstat (limited to 'subx/050write_stderr.subx')
| -rw-r--r-- | subx/050write_stderr.subx | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/subx/050write_stderr.subx b/subx/050write_stderr.subx deleted file mode 100644 index 2225b968..00000000 --- a/subx/050write_stderr.subx +++ /dev/null @@ -1,44 +0,0 @@ -== code - -# instruction effective address operand 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: (manual test if this is the last file loaded) - # syscall(exit, 0) -- we don't bother testing write-stderr just yet - bb/copy-to-EBX 0/imm32 - b8/copy-to-EAX 1/imm32 - cd/syscall 0x80/imm8 - -write-stderr: # s : (address array byte) -> <void> - # prolog - 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 - 53/push-EBX - # syscall(write, 2/stderr, (data) s+4, (size) *s) - # fd = 2 (stderr) - bb/copy-to-EBX 2/imm32 - # x = s+4 - 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX - 81 0/subop/add 3/mod/direct 1/rm32/ECX . . . . . 4/imm32 # add to ECX - # size = *s - 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . 2/r32/EDX 8/disp8 . # copy *(EBP+8) to EDX - 8b/copy 0/mod/indirect 2/rm32/EDX . . . 2/r32/EDX . . # copy *EDX to EDX - # syscall - b8/copy-to-EAX 4/imm32/write - cd/syscall 0x80/imm8 - # restore registers - 5b/pop-to-EBX - 5a/pop-to-EDX - 59/pop-to-ECX - 58/pop-to-EAX - # end - 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 |