diff options
Diffstat (limited to 'nptl/allocatestack.c')
| -rw-r--r-- | nptl/allocatestack.c | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index 606f246094..f35a8369bd 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -150,9 +150,7 @@ __attribute ((always_inline)) guard_position (void *mem, size_t size, size_t guardsize, struct pthread *pd, size_t pagesize_m1) { -#ifdef NEED_SEPARATE_REGISTER_STACK - return mem + (((size - guardsize) / 2) & ~pagesize_m1); -#elif _STACK_GROWS_DOWN +#if _STACK_GROWS_DOWN return mem; #elif _STACK_GROWS_UP return (char *) (((uintptr_t) pd - guardsize) & ~pagesize_m1); @@ -166,7 +164,7 @@ setup_stack_prot (char *mem, size_t size, char *guard, size_t guardsize, const int prot) { char *guardend = guard + guardsize; -#if _STACK_GROWS_DOWN && !defined(NEED_SEPARATE_REGISTER_STACK) +#if _STACK_GROWS_DOWN /* As defined at guard_position, for architectures with downward stack the guard page is always at start of the allocated area. */ if (__mprotect (guardend, size - guardsize, prot) != 0) @@ -189,7 +187,7 @@ advise_stack_range (void *mem, size_t size, uintptr_t pd, size_t guardsize) { uintptr_t sp = (uintptr_t) CURRENT_STACK_FRAME; size_t pagesize_m1 = __getpagesize () - 1; -#if _STACK_GROWS_DOWN && !defined(NEED_SEPARATE_REGISTER_STACK) +#if _STACK_GROWS_DOWN size_t freesize = (sp - (uintptr_t) mem) & ~pagesize_m1; assert (freesize < size); if (freesize > PTHREAD_STACK_MIN) @@ -510,19 +508,7 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, { /* The old guard area is too large. */ -#ifdef NEED_SEPARATE_REGISTER_STACK - char *guard = mem + (((size - guardsize) / 2) & ~pagesize_m1); - char *oldguard = mem + (((size - pd->guardsize) / 2) & ~pagesize_m1); - - if (oldguard < guard - && __mprotect (oldguard, guard - oldguard, prot) != 0) - goto mprot_error; - - if (__mprotect (guard + guardsize, - oldguard + pd->guardsize - guard - guardsize, - prot) != 0) - goto mprot_error; -#elif _STACK_GROWS_DOWN +#if _STACK_GROWS_DOWN if (__mprotect ((char *) mem + guardsize, pd->guardsize - guardsize, prot) != 0) goto mprot_error; @@ -599,7 +585,7 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, static void name_stack_maps (struct pthread *pd, bool set) { -#if _STACK_GROWS_DOWN && !defined(NEED_SEPARATE_REGISTER_STACK) +#if _STACK_GROWS_DOWN void *stack = pd->stackblock + pd->guardsize; #else void *stack = pd->stackblock; |