diff options
Diffstat (limited to 'lib/libc/internal/arch/x86_64/setjmp.c')
| -rw-r--r-- | lib/libc/internal/arch/x86_64/setjmp.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/libc/internal/arch/x86_64/setjmp.c b/lib/libc/internal/arch/x86_64/setjmp.c new file mode 100644 index 00000000..ea205e16 --- /dev/null +++ b/lib/libc/internal/arch/x86_64/setjmp.c @@ -0,0 +1,19 @@ +#include "bits/setjmp.h" // for jmp_buf + +#include <setjmp.h> // for setjmp + +__attribute__((naked, returns_twice)) int setjmp(jmp_buf env) +{ + __asm__ __volatile__("mov %rbx,(%rdi)\n" + "mov %rbp,8(%rdi)\n" + "mov %r12,16(%rdi)\n" + "mov %r13,24(%rdi)\n" + "mov %r14,32(%rdi)\n" + "mov %r15,40(%rdi)\n" + "lea 8(%rsp),%rdx\n" + "mov %rdx,48(%rdi)\n" + "mov (%rsp),%rdx\n" + "mov %rdx,56(%rdi)\n" + "xor %eax,%eax\n" + "ret\n"); +} |