diff options
| -rw-r--r-- | tools/include/nolibc/arch-x86_64.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/include/nolibc/arch-x86_64.h b/tools/include/nolibc/arch-x86_64.h index 8d482505c347..683702a16a61 100644 --- a/tools/include/nolibc/arch-x86_64.h +++ b/tools/include/nolibc/arch-x86_64.h @@ -178,6 +178,8 @@ struct sys_stat_struct { _ret; \ }) +char **environ __attribute__((weak)); + /* startup code */ /* * x86-64 System V ABI mandates: @@ -191,6 +193,7 @@ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void) "pop %rdi\n" // argc (first arg, %rdi) "mov %rsp, %rsi\n" // argv[] (second arg, %rsi) "lea 8(%rsi,%rdi,8),%rdx\n" // then a NULL then envp (third arg, %rdx) + "mov %rdx, environ\n" // save environ "xor %ebp, %ebp\n" // zero the stack frame "and $-16, %rsp\n" // x86 ABI : esp must be 16-byte aligned before call "call main\n" // main() returns the status code, we'll exit with it. |