1 #ifndef REGRESS_PIVOT_H
2 #define REGRESS_PIVOT_H
3
pivot(void * newstack)4 static void pivot(void *newstack) {
5 #if defined(__aarch64__)
6 asm("mov sp, %0; ldr lr, [sp]; ret;" ::"r"(newstack));
7 #elif defined(__amd64__)
8 asm("mov %0, %%rsp; retq;" ::"r"(newstack));
9 #elif defined(__i386__)
10 asm("mov %0, %%esp; retl;" ::"r"(newstack));
11 #elif defined(__mips64__)
12 asm("move $sp, %0; ld $ra, 0($sp); jr $ra;" ::"r"(newstack));
13 #elif defined(__powerpc64__)
14 asm("mr %%r1, %0; ld %%r3, 0(%%r1); mtlr %%r3; blr;" ::"r"(newstack));
15 #elif defined(__powerpc__)
16 asm("mr %%r1, %0; lwz %%r3, 0(%%r1); mtlr %%r3; blr;" ::"r"(newstack));
17 #elif defined(__riscv)
18 asm("mv sp, %0; ld ra, 0(sp); jr ra" ::"r"(newstack));
19 #endif
20 }
21
22 #endif
23