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| 0000000000400630 <foo(int)>: | |
| 400630: 89 f8 mov %edi,%eax | |
| 400632: 41 89 c0 mov %eax,%r8d | |
| 400635: 0f b6 f0 movzbl %al,%esi | |
| 400638: 0f b6 d4 movzbl %ah,%edx | |
| 40063b: c1 e8 10 shr $0x10,%eax | |
| 40063e: 41 c1 e8 18 shr $0x18,%r8d | |
| 400642: 0f b6 c8 movzbl %al,%ecx | |
| 400645: bf 90 07 40 00 mov $0x400790,%edi | |
| 40064a: 31 c0 xor %eax,%eax | |
| 40064c: e9 9f fe ff ff jmpq 4004f0 <printf@plt> | |
| 400651: 66 66 66 66 66 66 2e data16 data16 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
| 400658: 0f 1f 84 00 00 00 00 | |
| 40065f: 00 | |
| 0000000000400660 <bar(int)>: | |
| 400660: 89 f8 mov %edi,%eax | |
| 400662: 41 89 c0 mov %eax,%r8d | |
| 400665: 0f b6 f0 movzbl %al,%esi | |
| 400668: 0f b6 d4 movzbl %ah,%edx | |
| 40066b: c1 e8 10 shr $0x10,%eax | |
| 40066e: 41 c1 e8 18 shr $0x18,%r8d | |
| 400672: 0f b6 c8 movzbl %al,%ecx | |
| 400675: bf 90 07 40 00 mov $0x400790,%edi | |
| 40067a: 31 c0 xor %eax,%eax | |
| 40067c: e9 6f fe ff ff jmpq 4004f0 <printf@plt> | |
| 400681: 66 66 66 66 66 66 2e data16 data16 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
| 400688: 0f 1f 84 00 00 00 00 | |
| 40068f: 00 |
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| ` � 0` 4 p@ � 0@ * D S g `@ ! > t@ o � � �@ � � 0` � 8` � 0@ ! � �@ @ e % 4` � 8` 1 4` 8 �@ d �@ crtstuff.c __JCR_LIST__ deregister_tm_clones __do_global_dtors_aux completed.6936 __do_global_dtors_aux_fini_array_entry frame_dummy __frame_dummy_init_array_entry /tmp/a.cpp __FRAME_END__ __JCR_END__ __GNU_EH_FRAME_HDR _GLOBAL_OFFSET_TABLE_ __init_array_end __init_array_start _DYNAMIC printf@@GLIBC_2.2.5 __libc_csu_fini __gmon_start__ _Jv_RegisterClasses _Z3bari __libc_start_main@@GLIBC_2.2.5 _ITM_deregisterTMCloneTable _IO_stdin_used _ITM_registerTMCloneTable __data_start __TMC_END__ _Z3fooi __dso_handle strtol@@GLIBC_2.2.5 __libc_csu_init __bss_start _edata main .symtab .strtab .shstrtab .interp .note.ABI-tag .note.gnu.build-id .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rela.dyn .rela.plt .init .plt.got .text .fini .rodata .eh_frame_hdr .eh_frame .init_array .fini_array .jcr .dynamic .got.plt .data .bss .comment 8@ 8 # T@ T 1 t@ t $ D ���o �@ � N �@ � � V x@ x � ^ ���o 0@ 0 k ���o @@ @ z `@ ` � B x@ x H � �@ � � �@ � @ � @ � 0@ 0 B � t@ t � �@ � ) � �@ � D � �@ � , � � | |
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| � �` � � ` 0 � 0` 0 � 4` 4 0 4 Y ] � � / = #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <inttypes.h> | |
| union Bla { | |
| int a; | |
| char b; | |
| inline uint8_t &operator[](size_t i) { return reinterpret_cast<uint8_t *>(this)[i]; } | |
| inline uint8_t operator[](size_t i) const { return reinterpret_cast<const uint8_t *>(this)[i]; } | |
| }; | |
| union Bli { | |
| int a; | |
| char b; | |
| uint8_t bytes[0]; | |
| }; | |
| void foo(int p) | |
| { | |
| Bla bla{}; | |
| bla.a = p; | |
| printf("%#.2x %#.2x %#.2x %#.2x\n", bla[0], bla[1], bla[2], bla[3]); | |
| } | |
| void bar(int p) | |
| { | |
| Bli bli{}; | |
| bli.a = p; | |
| printf("%#.2x %#.2x %#.2x %#.2x\n", bli.bytes[0], bli.bytes[1], bli.bytes[2], bli.bytes[3]); | |
| } | |
| int main(int argc, const char *argv[]) | |
| { | |
| int p = atoi(argv[1]); | |
| foo(p); | |
| bar(p); | |
| return 0; | |
| } |
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