diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libthread/Darwin-386.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/libthread/Darwin-386.c b/src/libthread/Darwin-386.c index 3725f264..0bd3c0fd 100644 --- a/src/libthread/Darwin-386.c +++ b/src/libthread/Darwin-386.c @@ -3,10 +3,19 @@ void makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...) { + int n; int *sp; sp = (int*)ucp->uc_stack.ss_sp+ucp->uc_stack.ss_size/4; sp -= argc; + /* + * Stack pointer at call instruction (before return address + * gets pushed) must be 16-byte aligned. + */ + if((uintptr)sp%4) + abort(); + while((uintptr)sp%16) + sp--; memmove(sp, &argc+1, argc*sizeof(int)); *--sp = 0; /* return address */ ucp->uc_mcontext.mc_eip = (long)func; |