diff options
Diffstat (limited to 'src/pkg/runtime/linux/386/signal.c')
| -rw-r--r-- | src/pkg/runtime/linux/386/signal.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/pkg/runtime/linux/386/signal.c b/src/pkg/runtime/linux/386/signal.c index 8916e10bd..4045b2efc 100644 --- a/src/pkg/runtime/linux/386/signal.c +++ b/src/pkg/runtime/linux/386/signal.c @@ -182,3 +182,27 @@ os·sigpipe(void) sigaction(SIGPIPE, SIG_DFL, false); runtime·raisesigpipe(); } + +#define AT_NULL 0 +#define AT_SYSINFO 32 +extern uint32 runtime·_vdso; + +#pragma textflag 7 +void runtime·linux_setup_vdso(int32 argc, void *argv_list) +{ + byte **argv = &argv_list; + byte **envp; + uint32 *auxv; + + // skip envp to get to ELF auxiliary vector. + for(envp = &argv[argc+1]; *envp != nil; envp++) + ; + envp++; + + for(auxv=(uint32*)envp; auxv[0] != AT_NULL; auxv += 2) { + if(auxv[0] == AT_SYSINFO) { + runtime·_vdso = auxv[1]; + break; + } + } +} |