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| author | Kartik Agaram <vc@akkartik.com> | 2020-05-25 19:26:18 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-05-25 19:26:18 -0700 |
| commit | 3b5b19df66c0de4f916ba00298c6e000fc69de71 (patch) | |
| tree | d9dbf680c2bf2df45de3be3f11b44069c3715166 /069allocate.subx | |
| parent | d796318101775f9150af5d5f3bca61cdf31c41fa (diff) | |
| download | mu-3b5b19df66c0de4f916ba00298c6e000fc69de71.tar.gz | |
6406 - primitive 'copy-handle'
Diffstat (limited to '069allocate.subx')
| -rw-r--r-- | 069allocate.subx | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/069allocate.subx b/069allocate.subx index 0c75ece0..c65a369e 100644 --- a/069allocate.subx +++ b/069allocate.subx @@ -489,6 +489,29 @@ $handle-equal?:end: 5d/pop-to-ebp c3/return +copy-handle: # src: handle, dest: (addr handle) + # . prologue + 55/push-ebp + 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp + # . save registers + 50/push-eax + 51/push-ecx + # ecx = dest + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx + # *dest = src + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 8/disp8 . # copy *(ebp+8) to eax + 89/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy eax to *ecx + 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax + 89/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy eax to *(ecx+4) +$copy-handle:end: + # . restore registers + 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 + # helper: create a nested allocation descriptor (useful for tests) allocate-region: # ad: (addr allocation-descriptor), n: int, out: (addr handle allocation-descriptor) # . prologue |