diff options
Diffstat (limited to 'lib/mlibc/options/internal/x86_64/setjmp.S')
| -rw-r--r-- | lib/mlibc/options/internal/x86_64/setjmp.S | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/mlibc/options/internal/x86_64/setjmp.S b/lib/mlibc/options/internal/x86_64/setjmp.S new file mode 100644 index 0000000..aa8a134 --- /dev/null +++ b/lib/mlibc/options/internal/x86_64/setjmp.S @@ -0,0 +1,54 @@ + +.type __setjmp, "function" +__setjmp: + mov %rbx, 0x00(%rdi) + mov %rbp, 0x08(%rdi) + mov %r12, 0x10(%rdi) + mov %r13, 0x18(%rdi) + mov %r14, 0x20(%rdi) + mov %r15, 0x28(%rdi) + + lea 8(%rsp), %rax # rsp before return rip is pushed + mov %rax, 0x30(%rdi) + mov (%rsp), %rax # return rip + mov %rax, 0x38(%rdi) + + test %rdx, %rdx + jnz 1f + xor %rax, %rax + ret + +1: + jmp __sigsetjmp + +.global setjmp +.type setjmp, "function" +setjmp: + xor %rdx, %rdx + jmp __setjmp + +.global sigsetjmp +.type sigsetjmp, "function" +sigsetjmp: + mov $1, %rdx + jmp __setjmp + +.global longjmp +.type longjmp, "function" +longjmp: + mov 0x00(%rdi), %rbx + mov 0x08(%rdi), %rbp + mov 0x10(%rdi), %r12 + mov 0x18(%rdi), %r13 + mov 0x20(%rdi), %r14 + mov 0x28(%rdi), %r15 + + mov %rsi, %rax + test %rax, %rax + jnz 1f + inc %rax +1: + mov 0x30(%rdi), %rsp + jmp *0x38(%rdi) +.section .note.GNU-stack,"",%progbits + |