624 lines
32 KiB
Plaintext
624 lines
32 KiB
Plaintext
# Helpers for parsing SubX words, with their rules for hex, labels and metadata.
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== code
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# instruction effective address register displacement immediate
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# . op subop mod rm32 base index scale r32
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# . 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
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has-metadata?: # word: (addr slice), s: (addr string) -> result/eax: boolean
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# pseudocode:
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# var twig: &slice = next-token-from-slice(word->start, word->end, '/') # skip name
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# curr = twig->end
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# while true
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# twig = next-token-from-slice(curr, word->end, '/')
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# if (twig.empty()) break
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# if (slice-equal?(twig, s)) return true
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# curr = twig->end
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# return false
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# . save registers
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51/push-ecx
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52/push-edx
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56/push-esi
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57/push-edi
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# esi = word
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8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
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# var edx: (addr byte) = word->end
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8b/copy 1/mod/*+disp8 6/rm32/esi . . . 2/r32/edx 4/disp8 . # copy *(esi+4) to edx
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# var twig/edi: slice
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68/push 0/imm32/end
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68/push 0/imm32/start
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89/copy 3/mod/direct 7/rm32/edi . . . 4/r32/esp . . # copy esp to edi
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# next-token-from-slice(word->start, word->end, '/', twig)
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# . . push args
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57/push-edi
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68/push 0x2f/imm32/slash
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52/push-edx
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ff 6/subop/push 0/mod/indirect 6/rm32/esi . . . . . . # push *esi
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# . . call
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e8/call next-token-from-slice/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp
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$has-metadata?:loop:
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# next-token-from-slice(curr, word->end, '/', twig)
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# . . push args
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57/push-edi
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68/push 0x2f/imm32/slash
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52/push-edx
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ff 6/subop/push 1/mod/*+disp8 7/rm32/edi . . . . 4/disp8 . # push *(edi+4)
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# . . call
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e8/call next-token-from-slice/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp
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# if (slice-empty?(twig)) return false
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# . eax = slice-empty?(twig)
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# . . push args
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57/push-edi
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# . . call
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e8/call slice-empty?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# . if (eax != false) return false
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3d/compare-eax-and 0/imm32/false
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75/jump-if-!= $has-metadata?:false/disp8
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# if (slice-equal?(twig, s)) return true
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# . eax = slice-equal?(twig, s)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
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57/push-edi
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . if (eax != false) return true
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3d/compare-eax-and 0/imm32/false
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# eax already contains true
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75/jump-if-!= $has-metadata?:end/disp8
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eb/jump $has-metadata?:loop/disp8
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$has-metadata?:false:
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b8/copy-to-eax 0/imm32/false
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$has-metadata?:end:
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# . reclaim locals
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . restore registers
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5f/pop-to-edi
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5e/pop-to-esi
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5a/pop-to-edx
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59/pop-to-ecx
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-has-metadata-true:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# (eax..ecx) = "ab/imm32"
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b8/copy-to-eax "ab/imm32"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
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05/add-to-eax 4/imm32
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# var in/esi: slice = {eax, ecx}
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51/push-ecx
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50/push-eax
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89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
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# eax = has-metadata?(esi, "imm32")
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# . . push args
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68/push "imm32"/imm32
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56/push-esi
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# . . call
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e8/call has-metadata?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(eax, 1, msg)
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# . . push args
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68/push "F - test-has-metadata-true"/imm32
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68/push 1/imm32/true
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-has-metadata-false:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# (eax..ecx) = "ab/c"
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b8/copy-to-eax "ab/c"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
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05/add-to-eax 4/imm32
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# var in/esi: slice = {eax, ecx}
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51/push-ecx
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50/push-eax
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89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
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# eax = has-metadata?(esi, "d")
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# . . push args
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68/push "d"/imm32
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56/push-esi
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# . . call
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e8/call has-metadata?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(eax, 0, msg)
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# . . push args
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68/push "F - test-has-metadata-false"/imm32
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68/push 0/imm32/false
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-has-metadata-ignore-name:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# (eax..ecx) = "a/b"
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b8/copy-to-eax "a/b"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
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05/add-to-eax 4/imm32
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# var in/esi: slice = {eax, ecx}
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51/push-ecx
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50/push-eax
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89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
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# eax = has-metadata?(esi, "a")
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# . . push args
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68/push "a"/imm32
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56/push-esi
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# . . call
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e8/call has-metadata?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(eax, 0, msg)
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# . . push args
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68/push "F - test-has-metadata-ignore-name"/imm32
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68/push 0/imm32/false
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-has-metadata-multiple-true:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# (eax..ecx) = "a/b/c"
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b8/copy-to-eax "a/b/c"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
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05/add-to-eax 4/imm32
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# var in/esi: slice = {eax, ecx}
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51/push-ecx
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50/push-eax
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89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
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# eax = has-metadata?(esi, "c")
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# . . push args
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68/push "c"/imm32
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56/push-esi
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# . . call
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e8/call has-metadata?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(eax, 1, msg)
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# . . push args
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68/push "F - test-has-metadata-multiple-true"/imm32
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68/push 1/imm32/true
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-has-metadata-multiple-false:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# (eax..ecx) = "a/b/c"
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b8/copy-to-eax "a/b/c"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
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05/add-to-eax 4/imm32
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# var in/esi: slice = {eax, ecx}
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51/push-ecx
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50/push-eax
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89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi
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# eax = has-metadata?(esi, "d")
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# . . push args
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68/push "d"/imm32
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56/push-esi
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# . . call
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e8/call has-metadata?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# check-ints-equal(eax, 0, msg)
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# . . push args
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68/push "F - test-has-metadata-multiple-false"/imm32
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68/push 0/imm32/false
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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# conditions for 'valid' names that are not at risk of looking like hex numbers
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# keep in sync with the rules in labels.cc
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#: - if it starts with a digit, it's treated as a number. If it can't be
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#: parsed as hex it will raise an error.
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#: - if it starts with '-' it's treated as a number.
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#: - if it starts with '0x' it's treated as a number. (redundant)
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#: - if it's two characters long, it can't be a name. Either it's a hex
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#: byte, or it raises an error.
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valid-name?: # in: (addr slice) -> result/eax: boolean
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# . save registers
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51/push-ecx
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56/push-esi
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# esi = in
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8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
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# var start/ecx: (addr byte) = in->start
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8b/copy 0/mod/indirect 6/rm32/esi . . . 1/r32/ecx . . # copy *esi to ecx
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$valid-name?:check0:
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# if (start >= in->end) return false
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3b/compare 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 4/disp8 . # compare ecx with *(esi+4)
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73/jump-if-addr>= $valid-name?:false/disp8
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$valid-name?:check1:
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# var len/eax: int = in->end - start
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8b/copy 1/mod/*+disp8 6/rm32/esi . . . 0/r32/eax 4/disp8 . # copy *(esi+4) to eax
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29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
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# if (eax == 2) return false
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3d/compare-eax-and 2/imm32
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74/jump-if-= $valid-name?:false/disp8
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$valid-name?:check2:
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# var c/eax: (addr byte) = *start
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31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax
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8a/copy-byte 0/mod/indirect 1/rm32/ecx . . . 0/r32/AL . . # copy byte at *ecx to AL
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# if (c == "-") return false
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3d/compare-eax-and 2d/imm32/-
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74/jump-if-= $valid-name?:false/disp8
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$valid-name?:check3a:
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# if (c < "0") return true
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3d/compare-eax-with 30/imm32/0
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7c/jump-if-< $valid-name?:true/disp8
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$valid-name?:check3b:
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# if (c > "9") return true
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3d/compare-eax-with 39/imm32/9
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7f/jump-if-> $valid-name?:true/disp8
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$valid-name?:false:
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# return false
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b8/copy-to-eax 0/imm32/false
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eb/jump $valid-name?:end/disp8
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$valid-name?:true:
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# return true
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b8/copy-to-eax 1/imm32/true
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$valid-name?:end:
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# . restore registers
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5e/pop-to-esi
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59/pop-to-ecx
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-valid-name-digit-prefix:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# (eax..ecx) = "34"
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b8/copy-to-eax "34"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
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05/add-to-eax 4/imm32
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# var slice/ecx: slice = {eax, ecx}
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51/push-ecx
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50/push-eax
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# eax = valid-name?(slice)
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# . . push args
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51/push-ecx
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# . . call
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e8/call valid-name?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# check-ints-equal(eax, 0, msg)
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# . . push args
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68/push "F - test-valid-name-digit-prefix"/imm32
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68/push 0/imm32/false
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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test-valid-name-negative-prefix:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# (eax..ecx) = "-0x34"
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b8/copy-to-eax "-0x34"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
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05/add-to-eax 4/imm32
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# var slice/ecx: slice = {eax, ecx}
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51/push-ecx
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50/push-eax
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# eax = valid-name?(slice)
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# . . push args
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51/push-ecx
|
|
# . . call
|
|
e8/call valid-name?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# check-ints-equal(eax, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-valid-name-negative-prefix"/imm32
|
|
68/push 0/imm32/false
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-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-valid-name-0x-prefix:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# (eax..ecx) = "0x34"
|
|
b8/copy-to-eax "0x34"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/ecx: slice = {eax, ecx}
|
|
51/push-ecx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# eax = valid-name?(slice)
|
|
# . . push args
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call valid-name?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# check-ints-equal(eax, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-valid-name-0x-prefix"/imm32
|
|
68/push 0/imm32/false
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-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-valid-name-starts-with-pre-digit:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# (eax..ecx) = "/03"
|
|
b8/copy-to-eax "/03"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/ecx: slice = {eax, ecx}
|
|
51/push-ecx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# eax = valid-name?(slice)
|
|
# . . push args
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call valid-name?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# check-ints-equal(eax, 1, msg)
|
|
# . . push args
|
|
68/push "F - test-valid-name-starts-with-pre-digit"/imm32
|
|
68/push 1/imm32/true
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-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-valid-name-starts-with-post-digit:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# (eax..ecx) = "q34"
|
|
b8/copy-to-eax "q34"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/ecx: slice = {eax, ecx}
|
|
51/push-ecx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# eax = valid-name?(slice)
|
|
# . . push args
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call valid-name?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# check-ints-equal(eax, 1, msg)
|
|
# . . push args
|
|
68/push "F - test-valid-name-starts-with-post-digit"/imm32
|
|
68/push 1/imm32/true
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-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-valid-name-starts-with-digit:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# (eax..ecx) = "0x34"
|
|
b8/copy-to-eax "0x34"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/ecx: slice = {eax, ecx}
|
|
51/push-ecx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# eax = valid-name?(slice)
|
|
# . . push args
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call valid-name?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# check-ints-equal(eax, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-valid-name-starts-with-digit"/imm32
|
|
68/push 0/imm32/false
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-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
|
|
|
|
label?: # word: (addr slice) -> result/eax: boolean
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# . save registers
|
|
51/push-ecx
|
|
# ecx = word
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 8/disp8 . # copy *(ebp+8) to ecx
|
|
# var end/ecx: (addr byte) = word->end
|
|
8b/copy 1/mod/*+disp8 1/rm32/ecx . . . 1/r32/ecx 4/disp8 . # copy *(ecx+4) to ecx
|
|
# return *(end - 1) == ':'
|
|
# . eax = *(end-1)
|
|
31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax
|
|
8a/copy-byte 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/AL -1/disp8 . # copy byte at *(ecx-1) to AL
|
|
# . return (eax == ':')
|
|
3d/compare-eax-and 0x3a/imm32/colon
|
|
b8/copy-to-eax 1/imm32/true
|
|
74/jump-if-= $label?:end/disp8
|
|
b8/copy-to-eax 0/imm32/false
|
|
$label?:end:
|
|
# . restore registers
|
|
59/pop-to-ecx
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
test-label?:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
$test-label?:true:
|
|
# (eax..ecx) = "AAA:"
|
|
b8/copy-to-eax "AAA:"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/ecx: slice = {eax, ecx}
|
|
51/push-ecx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# label?(slice/ecx)
|
|
# . . push args
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call label?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# check-ints-equal(eax, 1, msg)
|
|
# . . push args
|
|
68/push "F - test-label?:true"/imm32
|
|
68/push 1/imm32
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-label?:false:
|
|
# (eax..ecx) = "AAA"
|
|
b8/copy-to-eax "AAA"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy *eax to ecx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx . 1/r32/ecx 4/disp8 . # copy eax+ecx+4 to ecx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/ecx: slice = {eax, ecx}
|
|
51/push-ecx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# label?(slice/ecx)
|
|
# . . push args
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call label?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# check-ints-equal(eax, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-label?:false"/imm32
|
|
68/push 0/imm32
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-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
|