| 1 | #if defined(__x86_64__) && defined(__linux__) |
|---|---|
| 2 | |
| 3 | #include "sanitizer_common/sanitizer_asm.h" |
| 4 | |
| 5 | .comm _ZN14__interception10real_vforkE,8,8 |
| 6 | .globl ASM_WRAPPER_NAME(vfork) |
| 7 | ASM_TYPE_FUNCTION(ASM_WRAPPER_NAME(vfork)) |
| 8 | ASM_WRAPPER_NAME(vfork): |
| 9 | _CET_ENDBR |
| 10 | // Store return address in the spill area and tear down the stack frame. |
| 11 | push %rcx |
| 12 | call COMMON_INTERCEPTOR_SPILL_AREA |
| 13 | pop %rcx |
| 14 | pop %rdi |
| 15 | mov %rdi, (%rax) |
| 16 | |
| 17 | call *_ZN14__interception10real_vforkE(%rip) |
| 18 | |
| 19 | // Restore return address from the spill area. |
| 20 | push %rcx |
| 21 | push %rax |
| 22 | call COMMON_INTERCEPTOR_SPILL_AREA |
| 23 | mov (%rax), %rdx |
| 24 | mov %rdx, 8(%rsp) |
| 25 | mov (%rsp), %rax |
| 26 | |
| 27 | // Call handle_vfork in the parent process (%rax != 0). |
| 28 | test %rax, %rax |
| 29 | je .L_exit |
| 30 | |
| 31 | lea 16(%rsp), %rdi |
| 32 | call COMMON_INTERCEPTOR_HANDLE_VFORK@PLT |
| 33 | |
| 34 | .L_exit: |
| 35 | pop %rax |
| 36 | ret |
| 37 | ASM_SIZE(ASM_WRAPPER_NAME(vfork)) |
| 38 | |
| 39 | ASM_INTERCEPTOR_TRAMPOLINE(vfork) |
| 40 | ASM_TRAMPOLINE_ALIAS(vfork, vfork) |
| 41 | |
| 42 | #endif |
| 43 |