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* sysdeps/i386/Makefile: Make sure gcc uses a frame pointer for
	all the files which use CURRENT_STACK_FRAME.
This commit is contained in:
Ulrich Drepper 2001-04-12 23:03:41 +00:00
parent b721a2c03c
commit b775be640a
3 changed files with 44 additions and 10 deletions
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3
linuxthreads/ChangeLog
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@ -1,5 +1,8 @@
2001-04-12 Ulrich Drepper <drepper@redhat.com>
* sysdeps/i386/Makefile: Make sure gcc uses a frame pointer for
all the files which use CURRENT_STACK_FRAME.
* sysdeps/i386/pt-machine.h (CURRENT_STACK_FRAME): Define using
__builtin_frame_address.
* sysdeps/i386/i686/pt-machine.h: Likewise.

13
linuxthreads/sysdeps/i386/Makefile
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@ -2,4 +2,17 @@ ifeq ($(subdir),linuxthreads)
# On i686 we must avoid generating the trampoline functions generated
# to get the GOT pointer.
CFLAGS-pt-initfini.s += -march=i386 -mcpu=i386
# Most files must not be compiled without frame pointer since we need
# the frame base address which is stored in %ebp unless the frame pointer
# is optimized out.
CFLAGS-cancel.c += -fno-omit-frame-pointer
CFLAGS-condvar.c += -fno-omit-frame-pointer
CFLAGS-join.c += -fno-omit-frame-pointer
CFLAGS-manager.c += -fno-omit-frame-pointer
CFLAGS-oldsemaphore.c += -fno-omit-frame-pointer
CFLAGS-pthreads.c += -fno-omit-frame-pointer
CFLAGS-ptlongjmp.c += -fno-omit-frame-pointer
CFLAGS-semaphore.c += -fno-omit-frame-pointer
CFLAGS-signals.c += -fno-omit-frame-pointer
endif

38
sysdeps/sparc/sparc64/dl-machine.h
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@ -49,19 +49,37 @@ elf_machine_dynamic (void)
static inline Elf64_Addr
elf_machine_load_address (void)
{
register Elf64_Addr elf_pic_register __asm__("%l7");
Elf64_Addr pc, la;
register Elf64_Addr *elf_pic_register __asm__("%l7");
/* Utilize the fact that a local .got entry will be partially
initialized at startup awaiting its RELATIVE fixup. */
/* We used to utilize the fact that a local .got entry will
be partially initialized at startup awaiting its RELATIVE
fixup:
__asm("sethi %%hi(.Load_address), %1\n"
".Load_address:\n\t"
"rd %%pc, %0\n\t"
"or %1, %%lo(.Load_address), %1\n\t"
: "=r"(pc), "=r"(la));
Elf64_Addr pc, la;
return pc - *(Elf64_Addr *)(elf_pic_register + la);
__asm("sethi %%hi(.Load_address), %1\n"
".Load_address:\n\t"
"rd %%pc, %0\n\t"
"or %1, %%lo(.Load_address), %1\n\t"
: "=r"(pc), "=r"(la));
return pc - *(Elf64_Addr *)(elf_pic_register + la);
Unfortunately as binutils tries to work around Solaris
dynamic linker bug which resolves R_SPARC_RELATIVE as X += B + A
instead of X = B + A this does not work any longer, since ld
clears it.
The following method relies on the fact that sparcv9 ABI maximal
page length is 1MB and all ELF segments on sparc64 are aligned
to 1MB. Also, it relies on _DYNAMIC coming after _GLOBAL_OFFSET_TABLE_
and assumes that they both fit into the first 1MB of the RW segment.
This should be true for some time unless ld.so grows too much, at the
moment the whole stripped ld.so is 128KB and only smaller part of that
is in the RW segment. */
return ((Elf64_Addr)elf_pic_register - *elf_pic_register + 0xfffff)
& ~0xfffffUL;
}
/* We have 4 cases to handle. And we code different code sequences