diff options
Diffstat (limited to 'coro.c')
| -rw-r--r-- | coro.c | 55 |
1 files changed, 51 insertions, 4 deletions
@@ -53,7 +53,7 @@ # include <stddef.h> #endif -#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX +#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM #include <stdlib.h> @@ -113,6 +113,46 @@ trampoline (int sig) #endif +#if CORO_ASM +void __attribute__((__noinline__, __fastcall__)) +coro_transfer (struct coro_context *prev, struct coro_context *next) +{ + asm volatile ( +#if __amd64 +# define NUM_CLOBBERED 5 + "push %%rbx\n\t" + "push %%r12\n\t" + "push %%r13\n\t" + "push %%r14\n\t" + "push %%r15\n\t" + "mov %%rsp, %0\n\t" + "mov %1, %%rsp\n\t" + "pop %%r15\n\t" + "pop %%r14\n\t" + "pop %%r13\n\t" + "pop %%r12\n\t" + "pop %%rbx\n\t" +#elif __i386 +# define NUM_CLOBBERED 4 + "push %%ebx\n\t" + "push %%esi\n\t" + "push %%edi\n\t" + "push %%ebp\n\t" + "mov %%esp, %0\n\t" + "mov %1, %%esp\n\t" + "pop %%ebp\n\t" + "pop %%edi\n\t" + "pop %%esi\n\t" + "pop %%ebx\n\t" +#else +# error unsupported architecture +#endif + : "=m" (prev->sp) + : "m" (next->sp) + ); +} +#endif + /* initialize a machine state */ void coro_create (coro_context *ctx, coro_func coro, void *arg, @@ -129,7 +169,7 @@ void coro_create (coro_context *ctx, makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); -#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX +#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM # if CORO_SJLJ stack_t ostk, nstk; @@ -230,7 +270,7 @@ void coro_create (coro_context *ctx, ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); #else -#error "linux libc or architecture not supported" +# error "linux libc or architecture not supported" #endif # elif CORO_IRIX @@ -239,12 +279,19 @@ void coro_create (coro_context *ctx, ctx->env[JB_PC] = (__uint64_t)coro_init; ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); +# elif CORO_ASM + + ctx->sp = (volatile void **)(ssize + (char *)sptr); + *--ctx->sp = (void *)coro_init; + *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp + ctx->sp -= NUM_CLOBBERED; + # endif coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); #else -error unsupported architecture +# error unsupported architecture #endif } |