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| author | Carlos O'Donell <carlos@redhat.com> | 2014-03-05 00:11:01 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2014-03-13 20:38:27 -0400 |
| commit | 2e03fae7b711b87733f8c897cb42ea74d2dc156a (patch) | |
| tree | ca1bc47286ee3ce91a2805c72f554bf9f338fc7e | |
| parent | 43ca83ecc482f34e002d5f0accfb4a7cef471e4a (diff) | |
| download | glibc-2e03fae7b711b87733f8c897cb42ea74d2dc156a.tar.gz glibc-2e03fae7b711b87733f8c897cb42ea74d2dc156a.tar.xz glibc-2e03fae7b711b87733f8c897cb42ea74d2dc156a.zip | |
hppa: Add _STACK_GROWS_* cases to pthread_attr_[sg]etstack.
This is one of a several NPTL patches to build glibc on hppa. The pthread_attr_[sg]etstack functions are defined by POSIX as taking a stackaddr that is the lowest addressable byte of the storage used for the stack. However, the internal iattr variable of the same name in NPTL is actually the final stack address as usable in the stack pointer for the machine. Therefore the NPTL implementation must add and subtract stacksize for _STACK_GROWS_DOWN architectures. HPPA is a _STACK_GROWS_UP architecture and doesn't need to add or subtract anything, the stack address *is* the lowest addressable byte of the storage. Tested on hppa-linux-gnu, with no regressions. Can't impact any other targets because of the conditionals. If nobody objects I'll check this in at the end of the week. I can't see there being any objections to this patch except that it introduces more code to maintain for an old architecture (perhaps we'll get another _S_G_U target in the future?).
| -rw-r--r-- | ChangeLog | 10 | ||||
| -rw-r--r-- | nptl/pthread_attr_getstack.c | 4 | ||||
| -rw-r--r-- | nptl/pthread_attr_setstack.c | 8 |
3 files changed, 21 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index a9cff1d809..28370933e7 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2014-03-13 Carlos O'Donell <carlos@redhat.com> + + * nptl/pthread_attr_setstack.c (__pthread_attr_setstack) + [!_STACK_GROWS_DOWN]: Don't add stacksize to stackaddr. + (__old_pthread_attr_setstack): Likewise. + * nptl/pthread_attr_getstack.c (__pthread_attr_getstack) + [!_STACK_GROWS_DOWN]: Likewise. + 2014-03-13 Mike Frysinger <vapier@gentoo.org> * config.make.in (have-bash2): Delete. @@ -86,7 +94,7 @@ [BZ #16381] * elf/Makefile (tests): Add tst-pie2. - (tests-pie): Add tst-pie2. + (tests-pie): Add tst-pie2. * elf/tst-pie2.c: New file. * elf/dl-load.c (_dl_map_object_from_fd): Assert correct l_type for ET_EXEC. diff --git a/nptl/pthread_attr_getstack.c b/nptl/pthread_attr_getstack.c index 3f4fd8d40a..0e245a090a 100644 --- a/nptl/pthread_attr_getstack.c +++ b/nptl/pthread_attr_getstack.c @@ -32,7 +32,11 @@ __pthread_attr_getstack (attr, stackaddr, stacksize) iattr = (struct pthread_attr *) attr; /* Store the result. */ +#if _STACK_GROWS_DOWN *stackaddr = (char *) iattr->stackaddr - iattr->stacksize; +#else + *stackaddr = (char *) iattr->stackaddr; +#endif *stacksize = iattr->stacksize; return 0; diff --git a/nptl/pthread_attr_setstack.c b/nptl/pthread_attr_setstack.c index 19a5b54981..4785501d5d 100644 --- a/nptl/pthread_attr_setstack.c +++ b/nptl/pthread_attr_setstack.c @@ -48,7 +48,11 @@ __pthread_attr_setstack (attr, stackaddr, stacksize) #endif iattr->stacksize = stacksize; +#if _STACK_GROWS_DOWN iattr->stackaddr = (char *) stackaddr + stacksize; +#else + iattr->stackaddr = (char *) stackaddr; +#endif iattr->flags |= ATTR_FLAG_STACKADDR; return 0; @@ -81,7 +85,11 @@ __old_pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr, # endif iattr->stacksize = stacksize; +#if _STACK_GROWS_DOWN iattr->stackaddr = (char *) stackaddr + stacksize; +#else + iattr->stackaddr = (char *) stackaddr; +#endif iattr->flags |= ATTR_FLAG_STACKADDR; return 0; |