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Added the assembly output from gobjdump.
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@jwasham
jwasham committed Aug 30, 2016
1 parent bd729c5 commit 80f93d8
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32 changes: 32 additions & 0 deletions assembly/asm.txt
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main.o: file format mach-o-i386


Disassembly of section .text:

00000000 <_main>:
0: 55 push %ebp
1: 89 e5 mov %esp,%ebp
3: 56 push %esi
4: 83 ec 24 sub $0x24,%esp
7: e8 00 00 00 00 call c <_main+0xc>
c: 58 pop %eax
d: 8b 4d 0c mov 0xc(%ebp),%ecx
10: 8b 55 08 mov 0x8(%ebp),%edx
13: 8d 80 42 00 00 00 lea 0x42(%eax),%eax
19: be 18 00 00 00 mov $0x18,%esi
1e: c7 45 f8 00 00 00 00 movl $0x0,-0x8(%ebp)
25: 89 55 f4 mov %edx,-0xc(%ebp)
28: 89 4d f0 mov %ecx,-0x10(%ebp)
2b: 89 04 24 mov %eax,(%esp)
2e: c7 44 24 04 18 00 00 movl $0x18,0x4(%esp)
35: 00
36: 89 75 ec mov %esi,-0x14(%ebp)
39: e8 c2 ff ff ff call 0 <_main>
3e: b9 0d f0 00 00 mov $0xf00d,%ecx
43: 89 45 e8 mov %eax,-0x18(%ebp)
46: 89 c8 mov %ecx,%eax
48: 83 c4 24 add $0x24,%esp
4b: 5e pop %esi
4c: 5d pop %ebp
4d: c3 ret
80 changes: 80 additions & 0 deletions assembly/buffer-intel.txt
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buffer: file format mach-o-x86-64


Disassembly of section .text:

0000000100000f50 <_main>:
100000f50: 55 push rbp
100000f51: 48 89 e5 mov rbp,rsp
100000f54: 48 83 ec 40 sub rsp,0x40
100000f58: 48 8b 05 b1 00 00 00 mov rax,QWORD PTR [rip+0xb1] # 100001010 <_main+0xc0>
100000f5f: 48 8b 08 mov rcx,QWORD PTR [rax]
100000f62: 48 89 4d f8 mov QWORD PTR [rbp-0x8],rcx
100000f66: c7 45 cc 00 00 00 00 mov DWORD PTR [rbp-0x34],0x0
100000f6d: c6 45 d0 0a mov BYTE PTR [rbp-0x30],0xa
100000f71: c6 45 d3 0d mov BYTE PTR [rbp-0x2d],0xd
100000f75: c6 45 f7 2a mov BYTE PTR [rbp-0x9],0x2a
100000f79: 48 8b 00 mov rax,QWORD PTR [rax]
100000f7c: 48 3b 45 f8 cmp rax,QWORD PTR [rbp-0x8]
100000f80: 0f 85 0b 00 00 00 jne 100000f91 <_main+0x41>
100000f86: b8 0d 10 0b 00 mov eax,0xb100d
100000f8b: 48 83 c4 40 add rsp,0x40
100000f8f: 5d pop rbp
100000f90: c3 ret
100000f91: e8 00 00 00 00 call 100000f96 <_main+0x46>

Disassembly of section __TEXT.__stubs:

0000000100000f96 <__TEXT.__stubs>:
100000f96: ff 25 7c 00 00 00 jmp QWORD PTR [rip+0x7c] # 100001018 <_main+0xc8>

Disassembly of section __TEXT.__stub_helper:

0000000100000f9c <__TEXT.__stub_helper>:
100000f9c: 4c 8d 1d 65 00 00 00 lea r11,[rip+0x65] # 100001008 <_main+0xb8>
100000fa3: 41 53 push r11
100000fa5: ff 25 55 00 00 00 jmp QWORD PTR [rip+0x55] # 100001000 <_main+0xb0>
100000fab: 90 nop
100000fac: 68 00 00 00 00 push 0x0
100000fb1: e9 e6 ff ff ff jmp 100000f9c <_main+0x4c>

Disassembly of section __TEXT.__unwind_info:

0000000100000fb8 <__TEXT.__unwind_info>:
100000fb8: 01 00 add DWORD PTR [rax],eax
100000fba: 00 00 add BYTE PTR [rax],al
100000fbc: 1c 00 sbb al,0x0
100000fbe: 00 00 add BYTE PTR [rax],al
100000fc0: 00 00 add BYTE PTR [rax],al
100000fc2: 00 00 add BYTE PTR [rax],al
100000fc4: 1c 00 sbb al,0x0
100000fc6: 00 00 add BYTE PTR [rax],al
100000fc8: 00 00 add BYTE PTR [rax],al
100000fca: 00 00 add BYTE PTR [rax],al
100000fcc: 1c 00 sbb al,0x0
100000fce: 00 00 add BYTE PTR [rax],al
100000fd0: 02 00 add al,BYTE PTR [rax]
100000fd2: 00 00 add BYTE PTR [rax],al
100000fd4: 50 push rax
100000fd5: 0f 00 00 sldt WORD PTR [rax]
100000fd8: 34 00 xor al,0x0
100000fda: 00 00 add BYTE PTR [rax],al
100000fdc: 34 00 xor al,0x0
100000fde: 00 00 add BYTE PTR [rax],al
100000fe0: 97 xchg edi,eax
100000fe1: 0f 00 00 sldt WORD PTR [rax]
100000fe4: 00 00 add BYTE PTR [rax],al
100000fe6: 00 00 add BYTE PTR [rax],al
100000fe8: 34 00 xor al,0x0
100000fea: 00 00 add BYTE PTR [rax],al
100000fec: 03 00 add eax,DWORD PTR [rax]
100000fee: 00 00 add BYTE PTR [rax],al
100000ff0: 0c 00 or al,0x0
100000ff2: 01 00 add DWORD PTR [rax],eax
100000ff4: 10 00 adc BYTE PTR [rax],al
100000ff6: 01 00 add DWORD PTR [rax],eax
100000ff8: 00 00 add BYTE PTR [rax],al
100000ffa: 00 00 add BYTE PTR [rax],al
100000ffc: 00 00 add BYTE PTR [rax],al
100000ffe: 00 01 add BYTE PTR [rcx],al
9 changes: 9 additions & 0 deletions assembly/buffer.c
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int main(){
char buf[40];
buf[0] = 0xA;
buf[3] = 0xD;
buf[39] = 42;

return 0xb100d;
}
37 changes: 37 additions & 0 deletions assembly/buffer.s
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.section __TEXT,__text,regular,pure_instructions
.macosx_version_min 10, 11
.globl _main
.align 4, 0x90
_main: ## @main
## BB#0:
pushl %ebp
movl %esp, %ebp
subl $56, %esp
calll L0$pb
L0$pb:
popl %eax
movl L___stack_chk_guard$non_lazy_ptr-L0$pb(%eax), %eax
movl (%eax), %ecx
movl %ecx, -4(%ebp)
movl $0, -48(%ebp)
movb $10, -44(%ebp)
movb $13, -41(%ebp)
movb $42, -5(%ebp)
movl (%eax), %eax
cmpl -4(%ebp), %eax
jne LBB0_2
## BB#1: ## %SP_return
movl $725005, %eax ## imm = 0xB100D
addl $56, %esp
popl %ebp
retl
LBB0_2: ## %CallStackCheckFailBlk
calll ___stack_chk_fail


.section __IMPORT,__pointers,non_lazy_symbol_pointers
L___stack_chk_guard$non_lazy_ptr:
.indirect_symbol ___stack_chk_guard
.long 0

.subsections_via_symbols
80 changes: 80 additions & 0 deletions assembly/buffer.txt
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buffer: file format mach-o-x86-64


Disassembly of section .text:

0000000100000f50 <_main>:
100000f50: 55 push %rbp
100000f51: 48 89 e5 mov %rsp,%rbp
100000f54: 48 83 ec 40 sub $0x40,%rsp
100000f58: 48 8b 05 b1 00 00 00 mov 0xb1(%rip),%rax # 100001010 <_main+0xc0>
100000f5f: 48 8b 08 mov (%rax),%rcx
100000f62: 48 89 4d f8 mov %rcx,-0x8(%rbp)
100000f66: c7 45 cc 00 00 00 00 movl $0x0,-0x34(%rbp)
100000f6d: c6 45 d0 0a movb $0xa,-0x30(%rbp)
100000f71: c6 45 d3 0d movb $0xd,-0x2d(%rbp)
100000f75: c6 45 f7 2a movb $0x2a,-0x9(%rbp)
100000f79: 48 8b 00 mov (%rax),%rax
100000f7c: 48 3b 45 f8 cmp -0x8(%rbp),%rax
100000f80: 0f 85 0b 00 00 00 jne 100000f91 <_main+0x41>
100000f86: b8 0d 10 0b 00 mov $0xb100d,%eax
100000f8b: 48 83 c4 40 add $0x40,%rsp
100000f8f: 5d pop %rbp
100000f90: c3 retq
100000f91: e8 00 00 00 00 callq 100000f96 <_main+0x46>

Disassembly of section __TEXT.__stubs:

0000000100000f96 <__TEXT.__stubs>:
100000f96: ff 25 7c 00 00 00 jmpq *0x7c(%rip) # 100001018 <_main+0xc8>

Disassembly of section __TEXT.__stub_helper:

0000000100000f9c <__TEXT.__stub_helper>:
100000f9c: 4c 8d 1d 65 00 00 00 lea 0x65(%rip),%r11 # 100001008 <_main+0xb8>
100000fa3: 41 53 push %r11
100000fa5: ff 25 55 00 00 00 jmpq *0x55(%rip) # 100001000 <_main+0xb0>
100000fab: 90 nop
100000fac: 68 00 00 00 00 pushq $0x0
100000fb1: e9 e6 ff ff ff jmpq 100000f9c <_main+0x4c>

Disassembly of section __TEXT.__unwind_info:

0000000100000fb8 <__TEXT.__unwind_info>:
100000fb8: 01 00 add %eax,(%rax)
100000fba: 00 00 add %al,(%rax)
100000fbc: 1c 00 sbb $0x0,%al
100000fbe: 00 00 add %al,(%rax)
100000fc0: 00 00 add %al,(%rax)
100000fc2: 00 00 add %al,(%rax)
100000fc4: 1c 00 sbb $0x0,%al
100000fc6: 00 00 add %al,(%rax)
100000fc8: 00 00 add %al,(%rax)
100000fca: 00 00 add %al,(%rax)
100000fcc: 1c 00 sbb $0x0,%al
100000fce: 00 00 add %al,(%rax)
100000fd0: 02 00 add (%rax),%al
100000fd2: 00 00 add %al,(%rax)
100000fd4: 50 push %rax
100000fd5: 0f 00 00 sldt (%rax)
100000fd8: 34 00 xor $0x0,%al
100000fda: 00 00 add %al,(%rax)
100000fdc: 34 00 xor $0x0,%al
100000fde: 00 00 add %al,(%rax)
100000fe0: 97 xchg %eax,%edi
100000fe1: 0f 00 00 sldt (%rax)
100000fe4: 00 00 add %al,(%rax)
100000fe6: 00 00 add %al,(%rax)
100000fe8: 34 00 xor $0x0,%al
100000fea: 00 00 add %al,(%rax)
100000fec: 03 00 add (%rax),%eax
100000fee: 00 00 add %al,(%rax)
100000ff0: 0c 00 or $0x0,%al
100000ff2: 01 00 add %eax,(%rax)
100000ff4: 10 00 adc %al,(%rax)
100000ff6: 01 00 add %eax,(%rax)
100000ff8: 00 00 add %al,(%rax)
100000ffa: 00 00 add %al,(%rax)
100000ffc: 00 00 add %al,(%rax)
100000ffe: 00 01 add %al,(%rcx)
2 changes: 1 addition & 1 deletion assembly/main.c
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Expand Up @@ -6,7 +6,7 @@

int main(int argc, char *argv[]) {

printf("I like the number %d.\n", 12345);
printf("I like the number %d.\n", 4 * 6);

return 0xf00d;
}
4 changes: 2 additions & 2 deletions assembly/main.s
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Expand Up @@ -14,12 +14,12 @@ L0$pb:
movl 12(%ebp), %ecx
movl 8(%ebp), %edx
leal L_.str-L0$pb(%eax), %eax
movl $12345, %esi ## imm = 0x3039
movl $24, %esi
movl $0, -8(%ebp)
movl %edx, -12(%ebp)
movl %ecx, -16(%ebp)
movl %eax, (%esp)
movl $12345, 4(%esp) ## imm = 0x3039
movl $24, 4(%esp)
movl %esi, -20(%ebp) ## 4-byte Spill
calll _printf
movl $61453, %ecx ## imm = 0xF00D
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