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Saren-Arterius/a.c

Created October 14, 2018 16:51
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a.c
#include <stdio.h>
int main(int argc, char const *argv[]) {
int cnt = 2;
for (int i = 1; i < 1000000000; i++) {
cnt += i % 2 == 0 ? -i : i;
}
printf("%d\n", cnt);
return 0;
}
Raw
a_clang.asm
a_clang： 檔案格式 elf64-x86-64
Disassembly of section .init:
0000000000001000 <_init>:
1000: f3 0f 1e fa endbr64
1004: 48 83 ec 08 sub $0x8,%rsp
1008: 48 8b 05 d9 2f 00 00 mov 0x2fd9(%rip),%rax # 3fe8 <__gmon_start__>
100f: 48 85 c0 test %rax,%rax
1012: 74 02 je 1016 <_init+0x16>
1014: ff d0 callq *%rax
1016: 48 83 c4 08 add $0x8,%rsp
101a: c3 retq
Disassembly of section .plt:
0000000000001020 <.plt>:
1020: ff 35 e2 2f 00 00 pushq 0x2fe2(%rip) # 4008 <_GLOBAL_OFFSET_TABLE_+0x8>
1026: ff 25 e4 2f 00 00 jmpq *0x2fe4(%rip) # 4010 <_GLOBAL_OFFSET_TABLE_+0x10>
102c: 0f 1f 40 00 nopl 0x0(%rax)
0000000000001030 <printf@plt>:
1030: ff 25 e2 2f 00 00 jmpq *0x2fe2(%rip) # 4018 <printf@GLIBC_2.2.5>
1036: 68 00 00 00 00 pushq $0x0
103b: e9 e0 ff ff ff jmpq 1020 <.plt>
Disassembly of section .text:
0000000000001040 <_start>:
1040: f3 0f 1e fa endbr64
1044: 31 ed xor %ebp,%ebp
1046: 49 89 d1 mov %rdx,%r9
1049: 5e pop %rsi
104a: 48 89 e2 mov %rsp,%rdx
104d: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp
1051: 50 push %rax
1052: 54 push %rsp
1053: 4c 8d 05 b6 02 00 00 lea 0x2b6(%rip),%r8 # 1310 <__libc_csu_fini>
105a: 48 8d 0d 3f 02 00 00 lea 0x23f(%rip),%rcx # 12a0 <__libc_csu_init>
1061: 48 8d 3d d8 00 00 00 lea 0xd8(%rip),%rdi # 1140 <main>
1068: ff 15 72 2f 00 00 callq *0x2f72(%rip) # 3fe0 <__libc_start_main@GLIBC_2.2.5>
106e: f4 hlt
106f: 90 nop
0000000000001070 <deregister_tm_clones>:
1070: 48 8d 3d b9 2f 00 00 lea 0x2fb9(%rip),%rdi # 4030 <__TMC_END__>
1077: 48 8d 05 b2 2f 00 00 lea 0x2fb2(%rip),%rax # 4030 <__TMC_END__>
107e: 48 39 f8 cmp %rdi,%rax
1081: 74 15 je 1098 <deregister_tm_clones+0x28>
1083: 48 8b 05 4e 2f 00 00 mov 0x2f4e(%rip),%rax # 3fd8 <_ITM_deregisterTMCloneTable>
108a: 48 85 c0 test %rax,%rax
108d: 74 09 je 1098 <deregister_tm_clones+0x28>
108f: ff e0 jmpq *%rax
1091: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
1098: c3 retq
1099: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
00000000000010a0 <register_tm_clones>:
10a0: 48 8d 3d 89 2f 00 00 lea 0x2f89(%rip),%rdi # 4030 <__TMC_END__>
10a7: 48 8d 35 82 2f 00 00 lea 0x2f82(%rip),%rsi # 4030 <__TMC_END__>
10ae: 48 29 fe sub %rdi,%rsi
10b1: 48 c1 fe 03 sar $0x3,%rsi
10b5: 48 89 f0 mov %rsi,%rax
10b8: 48 c1 e8 3f shr $0x3f,%rax
10bc: 48 01 c6 add %rax,%rsi
10bf: 48 d1 fe sar %rsi
10c2: 74 14 je 10d8 <register_tm_clones+0x38>
10c4: 48 8b 05 25 2f 00 00 mov 0x2f25(%rip),%rax # 3ff0 <_ITM_registerTMCloneTable>
10cb: 48 85 c0 test %rax,%rax
10ce: 74 08 je 10d8 <register_tm_clones+0x38>
10d0: ff e0 jmpq *%rax
10d2: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
10d8: c3 retq
10d9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
00000000000010e0 <__do_global_dtors_aux>:
10e0: f3 0f 1e fa endbr64
10e4: 80 3d 45 2f 00 00 00 cmpb $0x0,0x2f45(%rip) # 4030 <__TMC_END__>
10eb: 75 33 jne 1120 <__do_global_dtors_aux+0x40>
10ed: 55 push %rbp
10ee: 48 83 3d 02 2f 00 00 cmpq $0x0,0x2f02(%rip) # 3ff8 <__cxa_finalize@GLIBC_2.2.5>
10f5: 00
10f6: 48 89 e5 mov %rsp,%rbp
10f9: 74 0d je 1108 <__do_global_dtors_aux+0x28>
10fb: 48 8b 3d 26 2f 00 00 mov 0x2f26(%rip),%rdi # 4028 <__dso_handle>
1102: ff 15 f0 2e 00 00 callq *0x2ef0(%rip) # 3ff8 <__cxa_finalize@GLIBC_2.2.5>
1108: e8 63 ff ff ff callq 1070 <deregister_tm_clones>
110d: c6 05 1c 2f 00 00 01 movb $0x1,0x2f1c(%rip) # 4030 <__TMC_END__>
1114: 5d pop %rbp
1115: c3 retq
1116: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
111d: 00 00 00
1120: c3 retq
1121: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
1128: 00 00 00 00
112c: 0f 1f 40 00 nopl 0x0(%rax)
0000000000001130 <frame_dummy>:
1130: f3 0f 1e fa endbr64
1134: e9 67 ff ff ff jmpq 10a0 <register_tm_clones>
1139: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
0000000000001140 <main>:
1140: b8 02 00 00 00 mov $0x2,%eax
1145: 66 0f 6e f0 movd %eax,%xmm6
1149: 66 45 0f ef ff pxor %xmm15,%xmm15
114e: 66 44 0f 6f 15 b9 0e movdqa 0xeb9(%rip),%xmm10 # 2010 <_IO_stdin_used+0x10>
1155: 00 00
1157: b8 f0 c9 9a 3b mov $0x3b9ac9f0,%eax
115c: 66 44 0f 6f 0d cb 0e movdqa 0xecb(%rip),%xmm9 # 2030 <_IO_stdin_used+0x30>
1163: 00 00
1165: 66 44 0f 6f 05 d2 0e movdqa 0xed2(%rip),%xmm8 # 2040 <_IO_stdin_used+0x40>
116c: 00 00
116e: 66 44 0f 6f 1d f9 0e movdqa 0xef9(%rip),%xmm11 # 2070 <_IO_stdin_used+0x70>
1175: 00 00
1177: 66 44 0f 6f 35 00 0f movdqa 0xf00(%rip),%xmm14 # 2080 <_IO_stdin_used+0x80>
117e: 00 00
1180: 66 44 0f 6f 2d 07 0f movdqa 0xf07(%rip),%xmm13 # 2090 <_IO_stdin_used+0x90>
1187: 00 00
1189: 66 0f ef ff pxor %xmm7,%xmm7
118d: eb 73 jmp 1202 <main+0xc2>
118f: 90 nop
1190: 66 41 0f 6f d2 movdqa %xmm10,%xmm2
1195: 66 0f fe 15 b3 0e 00 paddd 0xeb3(%rip),%xmm2 # 2050 <_IO_stdin_used+0x50>
119c: 00
119d: 66 41 0f 6f ea movdqa %xmm10,%xmm5
11a2: 66 0f fe 2d b6 0e 00 paddd 0xeb6(%rip),%xmm5 # 2060 <_IO_stdin_used+0x60>
11a9: 00
11aa: 66 0f 6f f2 movdqa %xmm2,%xmm6
11ae: 66 41 0f db f1 pand %xmm9,%xmm6
11b3: 66 0f 6f fd movdqa %xmm5,%xmm7
11b7: 66 41 0f db f9 pand %xmm9,%xmm7
11bc: 66 41 0f 76 f7 pcmpeqd %xmm15,%xmm6
11c1: 66 41 0f 76 ff pcmpeqd %xmm15,%xmm7
11c6: 66 41 0f 6f db movdqa %xmm11,%xmm3
11cb: 66 41 0f fa da psubd %xmm10,%xmm3
11d0: 66 41 0f 6f c6 movdqa %xmm14,%xmm0
11d5: 66 41 0f fa c2 psubd %xmm10,%xmm0
11da: 66 0f db de pand %xmm6,%xmm3
11de: 66 0f df f2 pandn %xmm2,%xmm6
11e2: 66 0f eb f3 por %xmm3,%xmm6
11e6: 66 0f db c7 pand %xmm7,%xmm0
11ea: 66 0f df fd pandn %xmm5,%xmm7
11ee: 66 0f eb f8 por %xmm0,%xmm7
11f2: 66 0f fe f1 paddd %xmm1,%xmm6
11f6: 66 0f fe fc paddd %xmm4,%xmm7
11fa: 66 45 0f fe d5 paddd %xmm13,%xmm10
11ff: 83 c0 f0 add $0xfffffff0,%eax
1202: 66 41 0f 6f d2 movdqa %xmm10,%xmm2
1207: 66 0f fe 15 11 0e 00 paddd 0xe11(%rip),%xmm2 # 2020 <_IO_stdin_used+0x20>
120e: 00
120f: 66 41 0f 6f ea movdqa %xmm10,%xmm5
1214: 66 41 0f db e9 pand %xmm9,%xmm5
1219: 66 0f 6f e2 movdqa %xmm2,%xmm4
121d: 66 41 0f db e1 pand %xmm9,%xmm4
1222: 66 41 0f 76 ef pcmpeqd %xmm15,%xmm5
1227: 66 41 0f 76 e7 pcmpeqd %xmm15,%xmm4
122c: 66 45 0f 6f e0 movdqa %xmm8,%xmm12
1231: 66 45 0f fa e2 psubd %xmm10,%xmm12
1236: 66 41 0f 6f ca movdqa %xmm10,%xmm1
123b: 66 0f ef cd pxor %xmm5,%xmm1
123f: 66 0f fa cd psubd %xmm5,%xmm1
1243: 66 0f fe ce paddd %xmm6,%xmm1
1247: 66 44 0f db e4 pand %xmm4,%xmm12
124c: 66 0f df e2 pandn %xmm2,%xmm4
1250: 66 41 0f eb e4 por %xmm12,%xmm4
1255: 66 0f fe e7 paddd %xmm7,%xmm4
1259: 85 c0 test %eax,%eax
125b: 0f 85 2f ff ff ff jne 1190 <main+0x50>
1261: 50 push %rax
1262: 66 0f fe e1 paddd %xmm1,%xmm4
1266: 66 0f 70 c4 4e pshufd $0x4e,%xmm4,%xmm0
126b: 66 0f fe c4 paddd %xmm4,%xmm0
126f: 66 0f 70 c8 e5 pshufd $0xe5,%xmm0,%xmm1
1274: 66 0f fe c8 paddd %xmm0,%xmm1
1278: 66 0f 7e ce movd %xmm1,%esi
127c: 81 c6 fc c9 9a 3b add $0x3b9ac9fc,%esi
1282: 48 8d 3d 17 0e 00 00 lea 0xe17(%rip),%rdi # 20a0 <_IO_stdin_used+0xa0>
1289: 31 c0 xor %eax,%eax
128b: e8 a0 fd ff ff callq 1030 <printf@plt>
1290: 31 c0 xor %eax,%eax
1292: 59 pop %rcx
1293: c3 retq
1294: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
129b: 00 00 00
129e: 66 90 xchg %ax,%ax
00000000000012a0 <__libc_csu_init>:
12a0: f3 0f 1e fa endbr64
12a4: 41 57 push %r15
12a6: 49 89 d7 mov %rdx,%r15
12a9: 41 56 push %r14
12ab: 49 89 f6 mov %rsi,%r14
12ae: 41 55 push %r13
12b0: 41 89 fd mov %edi,%r13d
12b3: 41 54 push %r12
12b5: 4c 8d 25 1c 2b 00 00 lea 0x2b1c(%rip),%r12 # 3dd8 <__frame_dummy_init_array_entry>
12bc: 55 push %rbp
12bd: 48 8d 2d 1c 2b 00 00 lea 0x2b1c(%rip),%rbp # 3de0 <__init_array_end>
12c4: 53 push %rbx
12c5: 4c 29 e5 sub %r12,%rbp
12c8: 48 83 ec 08 sub $0x8,%rsp
12cc: 67 e8 2e fd ff ff addr32 callq 1000 <_init>
12d2: 48 c1 fd 03 sar $0x3,%rbp
12d6: 74 1e je 12f6 <__libc_csu_init+0x56>
12d8: 31 db xor %ebx,%ebx
12da: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
12e0: 4c 89 fa mov %r15,%rdx
12e3: 4c 89 f6 mov %r14,%rsi
12e6: 44 89 ef mov %r13d,%edi
12e9: 41 ff 14 dc callq *(%r12,%rbx,8)
12ed: 48 83 c3 01 add $0x1,%rbx
12f1: 48 39 dd cmp %rbx,%rbp
12f4: 75 ea jne 12e0 <__libc_csu_init+0x40>
12f6: 48 83 c4 08 add $0x8,%rsp
12fa: 5b pop %rbx
12fb: 5d pop %rbp
12fc: 41 5c pop %r12
12fe: 41 5d pop %r13
1300: 41 5e pop %r14
1302: 41 5f pop %r15
1304: c3 retq
1305: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
130c: 00 00 00 00
0000000000001310 <__libc_csu_fini>:
1310: f3 0f 1e fa endbr64
1314: c3 retq
Disassembly of section .fini:
0000000000001318 <_fini>:
1318: f3 0f 1e fa endbr64
131c: 48 83 ec 08 sub $0x8,%rsp
1320: 48 83 c4 08 add $0x8,%rsp
1324: c3 retq
Raw
a_gcc.asm
a_gcc： 檔案格式 elf64-x86-64
Disassembly of section .init:
0000000000001000 <_init>:
1000: f3 0f 1e fa endbr64
1004: 48 83 ec 08 sub $0x8,%rsp
1008: 48 8b 05 d9 2f 00 00 mov 0x2fd9(%rip),%rax # 3fe8 <__gmon_start__>
100f: 48 85 c0 test %rax,%rax
1012: 74 02 je 1016 <_init+0x16>
1014: ff d0 callq *%rax
1016: 48 83 c4 08 add $0x8,%rsp
101a: c3 retq
Disassembly of section .plt:
0000000000001020 <.plt>:
1020: ff 35 e2 2f 00 00 pushq 0x2fe2(%rip) # 4008 <_GLOBAL_OFFSET_TABLE_+0x8>
1026: ff 25 e4 2f 00 00 jmpq *0x2fe4(%rip) # 4010 <_GLOBAL_OFFSET_TABLE_+0x10>
102c: 0f 1f 40 00 nopl 0x0(%rax)
0000000000001030 <printf@plt>:
1030: ff 25 e2 2f 00 00 jmpq *0x2fe2(%rip) # 4018 <printf@GLIBC_2.2.5>
1036: 68 00 00 00 00 pushq $0x0
103b: e9 e0 ff ff ff jmpq 1020 <.plt>
Disassembly of section .text:
0000000000001040 <main>:
1040: 48 83 ec 08 sub $0x8,%rsp
1044: 66 0f ef db pxor %xmm3,%xmm3
1048: 31 c0 xor %eax,%eax
104a: 66 0f 6f 15 be 0f 00 movdqa 0xfbe(%rip),%xmm2 # 2010 <_IO_stdin_used+0x10>
1051: 00
1052: 66 0f 6f 0d c6 0f 00 movdqa 0xfc6(%rip),%xmm1 # 2020 <_IO_stdin_used+0x20>
1059: 00
105a: 66 0f 6f 25 ce 0f 00 movdqa 0xfce(%rip),%xmm4 # 2030 <_IO_stdin_used+0x30>
1061: 00
1062: 66 0f 6f f3 movdqa %xmm3,%xmm6
1066: 66 0f 6f 3d d2 0f 00 movdqa 0xfd2(%rip),%xmm7 # 2040 <_IO_stdin_used+0x40>
106d: 00
106e: 66 90 xchg %ax,%ax
1070: 66 0f 6f c1 movdqa %xmm1,%xmm0
1074: 66 0f 6f ea movdqa %xmm2,%xmm5
1078: 66 0f fe d4 paddd %xmm4,%xmm2
107c: 83 c0 01 add $0x1,%eax
107f: 66 0f db c7 pand %xmm7,%xmm0
1083: 66 0f 76 c6 pcmpeqd %xmm6,%xmm0
1087: 66 0f df e8 pandn %xmm0,%xmm5
108b: 66 0f df c1 pandn %xmm1,%xmm0
108f: 66 0f fe cc paddd %xmm4,%xmm1
1093: 66 0f eb c5 por %xmm5,%xmm0
1097: 66 0f fe d8 paddd %xmm0,%xmm3
109b: 3d 7f b2 e6 0e cmp $0xee6b27f,%eax
10a0: 75 ce jne 1070 <main+0x30>
10a2: 66 0f 6f c3 movdqa %xmm3,%xmm0
10a6: 48 8d 3d 57 0f 00 00 lea 0xf57(%rip),%rdi # 2004 <_IO_stdin_used+0x4>
10ad: 31 c0 xor %eax,%eax
10af: 66 0f 73 d8 08 psrldq $0x8,%xmm0
10b4: 66 0f fe d8 paddd %xmm0,%xmm3
10b8: 66 0f 6f c3 movdqa %xmm3,%xmm0
10bc: 66 0f 73 d8 04 psrldq $0x4,%xmm0
10c1: 66 0f fe d8 paddd %xmm0,%xmm3
10c5: 66 0f 7e de movd %xmm3,%esi
10c9: 83 c6 04 add $0x4,%esi
10cc: e8 5f ff ff ff callq 1030 <printf@plt>
10d1: 31 c0 xor %eax,%eax
10d3: 48 83 c4 08 add $0x8,%rsp
10d7: c3 retq
10d8: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
10df: 00
00000000000010e0 <_start>:
10e0: f3 0f 1e fa endbr64
10e4: 31 ed xor %ebp,%ebp
10e6: 49 89 d1 mov %rdx,%r9
10e9: 5e pop %rsi
10ea: 48 89 e2 mov %rsp,%rdx
10ed: 48 83 e4 f0 and $0xfffffffffffffff0,%rsp
10f1: 50 push %rax
10f2: 54 push %rsp
10f3: 4c 8d 05 56 01 00 00 lea 0x156(%rip),%r8 # 1250 <__libc_csu_fini>
10fa: 48 8d 0d df 00 00 00 lea 0xdf(%rip),%rcx # 11e0 <__libc_csu_init>
1101: 48 8d 3d 38 ff ff ff lea -0xc8(%rip),%rdi # 1040 <main>
1108: ff 15 d2 2e 00 00 callq *0x2ed2(%rip) # 3fe0 <__libc_start_main@GLIBC_2.2.5>
110e: f4 hlt
110f: 90 nop
0000000000001110 <deregister_tm_clones>:
1110: 48 8d 3d 19 2f 00 00 lea 0x2f19(%rip),%rdi # 4030 <__TMC_END__>
1117: 48 8d 05 12 2f 00 00 lea 0x2f12(%rip),%rax # 4030 <__TMC_END__>
111e: 48 39 f8 cmp %rdi,%rax
1121: 74 15 je 1138 <deregister_tm_clones+0x28>
1123: 48 8b 05 ae 2e 00 00 mov 0x2eae(%rip),%rax # 3fd8 <_ITM_deregisterTMCloneTable>
112a: 48 85 c0 test %rax,%rax
112d: 74 09 je 1138 <deregister_tm_clones+0x28>
112f: ff e0 jmpq *%rax
1131: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
1138: c3 retq
1139: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
0000000000001140 <register_tm_clones>:
1140: 48 8d 3d e9 2e 00 00 lea 0x2ee9(%rip),%rdi # 4030 <__TMC_END__>
1147: 48 8d 35 e2 2e 00 00 lea 0x2ee2(%rip),%rsi # 4030 <__TMC_END__>
114e: 48 29 fe sub %rdi,%rsi
1151: 48 c1 fe 03 sar $0x3,%rsi
1155: 48 89 f0 mov %rsi,%rax
1158: 48 c1 e8 3f shr $0x3f,%rax
115c: 48 01 c6 add %rax,%rsi
115f: 48 d1 fe sar %rsi
1162: 74 14 je 1178 <register_tm_clones+0x38>
1164: 48 8b 05 85 2e 00 00 mov 0x2e85(%rip),%rax # 3ff0 <_ITM_registerTMCloneTable>
116b: 48 85 c0 test %rax,%rax
116e: 74 08 je 1178 <register_tm_clones+0x38>
1170: ff e0 jmpq *%rax
1172: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
1178: c3 retq
1179: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
0000000000001180 <__do_global_dtors_aux>:
1180: f3 0f 1e fa endbr64
1184: 80 3d a5 2e 00 00 00 cmpb $0x0,0x2ea5(%rip) # 4030 <__TMC_END__>
118b: 75 33 jne 11c0 <__do_global_dtors_aux+0x40>
118d: 55 push %rbp
118e: 48 83 3d 62 2e 00 00 cmpq $0x0,0x2e62(%rip) # 3ff8 <__cxa_finalize@GLIBC_2.2.5>
1195: 00
1196: 48 89 e5 mov %rsp,%rbp
1199: 74 0d je 11a8 <__do_global_dtors_aux+0x28>
119b: 48 8b 3d 86 2e 00 00 mov 0x2e86(%rip),%rdi # 4028 <__dso_handle>
11a2: ff 15 50 2e 00 00 callq *0x2e50(%rip) # 3ff8 <__cxa_finalize@GLIBC_2.2.5>
11a8: e8 63 ff ff ff callq 1110 <deregister_tm_clones>
11ad: c6 05 7c 2e 00 00 01 movb $0x1,0x2e7c(%rip) # 4030 <__TMC_END__>
11b4: 5d pop %rbp
11b5: c3 retq
11b6: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
11bd: 00 00 00
11c0: c3 retq
11c1: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
11c8: 00 00 00 00
11cc: 0f 1f 40 00 nopl 0x0(%rax)
00000000000011d0 <frame_dummy>:
11d0: f3 0f 1e fa endbr64
11d4: e9 67 ff ff ff jmpq 1140 <register_tm_clones>
11d9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
00000000000011e0 <__libc_csu_init>:
11e0: f3 0f 1e fa endbr64
11e4: 41 57 push %r15
11e6: 49 89 d7 mov %rdx,%r15
11e9: 41 56 push %r14
11eb: 49 89 f6 mov %rsi,%r14
11ee: 41 55 push %r13
11f0: 41 89 fd mov %edi,%r13d
11f3: 41 54 push %r12
11f5: 4c 8d 25 ec 2b 00 00 lea 0x2bec(%rip),%r12 # 3de8 <__frame_dummy_init_array_entry>
11fc: 55 push %rbp
11fd: 48 8d 2d ec 2b 00 00 lea 0x2bec(%rip),%rbp # 3df0 <__init_array_end>
1204: 53 push %rbx
1205: 4c 29 e5 sub %r12,%rbp
1208: 48 83 ec 08 sub $0x8,%rsp
120c: 67 e8 ee fd ff ff addr32 callq 1000 <_init>
1212: 48 c1 fd 03 sar $0x3,%rbp
1216: 74 1e je 1236 <__libc_csu_init+0x56>
1218: 31 db xor %ebx,%ebx
121a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
1220: 4c 89 fa mov %r15,%rdx
1223: 4c 89 f6 mov %r14,%rsi
1226: 44 89 ef mov %r13d,%edi
1229: 41 ff 14 dc callq *(%r12,%rbx,8)
122d: 48 83 c3 01 add $0x1,%rbx
1231: 48 39 dd cmp %rbx,%rbp
1234: 75 ea jne 1220 <__libc_csu_init+0x40>
1236: 48 83 c4 08 add $0x8,%rsp
123a: 5b pop %rbx
123b: 5d pop %rbp
123c: 41 5c pop %r12
123e: 41 5d pop %r13
1240: 41 5e pop %r14
1242: 41 5f pop %r15
1244: c3 retq
1245: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
124c: 00 00 00 00
0000000000001250 <__libc_csu_fini>:
1250: f3 0f 1e fa endbr64
1254: c3 retq
Disassembly of section .fini:
0000000000001258 <_fini>:
1258: f3 0f 1e fa endbr64
125c: 48 83 ec 08 sub $0x8,%rsp
1260: 48 83 c4 08 add $0x8,%rsp
1264: c3 retq
Raw
results.txt
[saren@Saren-Workstation ~ ]% gcc -O3 b.c
[saren@Saren-Workstation ~ ]% time ./a.out
500000002
./a.out 0.24s user 0.00s system 116% cpu 0.203 total
[saren@Saren-Workstation ~ ]% clang -O3 b.c
[saren@Saren-Workstation ~ ]% time ./a.out
500000002
./a.out 0.20s user 0.00s system 109% cpu 0.184 total
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