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survey_baremetal: support /imm8

This commit is contained in:
Kartik K. Agaram 2021-03-14 19:25:39 -07:00
parent 499aad0bc7
commit 1dc1a65ea0
2 changed files with 14 additions and 2 deletions
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@ -1070,7 +1070,7 @@ $emit-output:check-metadata:
# . esi = eax
89/copy 3/mod/direct 6/rm32/esi . . . 0/r32/eax . . # copy eax to esi
$emit-output:check-imm8:
# if (has-metadata?(word-slice, "imm8")) abort
# if (!has-metadata?(word-slice, "imm8")) goto next check
# . eax = has-metadata?(edx, "imm8")
# . . push args
68/push "imm8"/imm32
@ -1081,7 +1081,19 @@ $emit-output:check-imm8:
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . if (eax != false) abort
3d/compare-eax-and 0/imm32/false
0f 85/jump-if-!= $emit-output:imm8-abort/disp32
74/jump-if-= $emit-output:check-imm32/disp8
$emit-output:emit-imm8:
# emit-hex(out, *address, 1)
# . . push args
68/push 1/imm32
ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
# . . call
e8/call emit-hex/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# continue
e9/jump $emit-output:word-loop/disp32
$emit-output:check-imm32:
# if (!has-metadata?(word-slice, "imm32")) goto next check
# . eax = has-metadata?(edx, "imm32")