diff options
Diffstat (limited to 'linux/ex13.subx')
| -rw-r--r-- | linux/ex13.subx | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/linux/ex13.subx b/linux/ex13.subx new file mode 100644 index 00000000..b7e802fd --- /dev/null +++ b/linux/ex13.subx @@ -0,0 +1,25 @@ +# Compare 3 and 3. +# +# To run: +# $ ./bootstrap translate init.linux apps/ex13.subx -o apps/ex13 +# $ ./bootstrap run apps/ex13 +# Expected result: +# $ echo $? +# 1 + +== code +# instruction effective address register displacement immediate +# . op subop mod rm32 base index scale r32 +# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes + +Entry: + b8/copy-to-eax 3/imm32 + 3d/compare-eax-and 3/imm32 + 0f 94/set-if-= 3/mod/direct 3/rm32/ebx . . . . . . # set ebx to ZF + 81 4/subop/and 3/mod/direct 3/rm32/ebx . . . . . 0xff/imm32 # AND with eax + +$exit: + # exit(ebx) + e8/call syscall_exit/disp32 + +# . . vim:nowrap:textwidth=0 |