diff options
Diffstat (limited to 'linux/104new-segment.subx')
| -rw-r--r-- | linux/104new-segment.subx | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/linux/104new-segment.subx b/linux/104new-segment.subx index 723e1afb..5a79ff19 100644 --- a/linux/104new-segment.subx +++ b/linux/104new-segment.subx @@ -16,26 +16,26 @@ # . 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: # manual test - # var ad/ecx: allocation-descriptor - 68/push 0/imm32/limit - 68/push 0/imm32/curr - 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx - # new-segment(0x1000, ad) - # . . push args - 51/push-ecx - 68/push 0x1000/imm32 - # . . call - e8/call new-segment/disp32 - # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp - # var eax: (addr _) = ad->curr - 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax - # write to *eax to check that we have access to the newly-allocated segment - c7 0/subop/copy 0/mod/direct 0/rm32/eax . . . . . 0x34/imm32 # copy to *eax - # syscall_exit(eax) - 89/copy 3/mod/direct 3/rm32/ebx . . . 0/r32/eax . . # copy eax to ebx - e8/call syscall_exit/disp32 +#? Entry: # manual test +#? # var ad/ecx: allocation-descriptor +#? 68/push 0/imm32/limit +#? 68/push 0/imm32/curr +#? 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx +#? # new-segment(0x1000, ad) +#? # . . push args +#? 51/push-ecx +#? 68/push 0x1000/imm32 +#? # . . call +#? e8/call new-segment/disp32 +#? # . . discard args +#? 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp +#? # var eax: (addr _) = ad->curr +#? 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax +#? # write to *eax to check that we have access to the newly-allocated segment +#? c7 0/subop/copy 0/mod/direct 0/rm32/eax . . . . . 0x34/imm32 # copy to *eax +#? # syscall_exit(eax) +#? 89/copy 3/mod/direct 3/rm32/ebx . . . 0/r32/eax . . # copy eax to ebx +#? e8/call syscall_exit/disp32 new-segment: # len: int, ad: (addr allocation-descriptor) # . prologue |