| .intel_syntax noprefix |
| .text |
| |
| .globl _ClobberAndCall |
| _ClobberAndCall: |
| .globl ClobberAndCall |
| ClobberAndCall: |
| |
| /* Clobber some significant registers and call the nullary function which is |
| passed in as the first argument. */ |
| |
| /* Pool pointer register. */ |
| push r15 |
| mov r15, 1 |
| |
| /* Thread register. */ |
| push r14 |
| mov r14, 1 |
| |
| /* Code register. */ |
| push r12 |
| mov r12, 1 |
| |
| /* Arguments descriptor register (volatile). */ |
| mov r10, 1 |
| |
| /* Clobber all other volatile registers (except the argument). */ |
| mov rax, 1 |
| mov rcx, 1 |
| mov rdx, 1 |
| mov rsi, 1 |
| mov r8, 1 |
| mov r9, 1 |
| mov r11, 1 |
| |
| /* Stack must be 16-byte aligned before the call. We save three registers above |
| to ensure this. */ |
| call rdi |
| |
| pop r12 |
| pop r14 |
| pop r15 |
| |
| ret |
