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52b2a80fae
This patch changes longjmp to always restore the TOC pointer (r2 register) to the caller frame on powerpc64 and powerpc64le. This is related to bug 21895 that reports a situation where you have a static longjmp to a shared object file. [BZ #21895] * sysdeps/powerpc/powerpc64/__longjmp-common.S: Remove condition code for restoring r2 in longjmp. * sysdeps/powerpc/powerpc64/Makefile: Added tst-setjmp-bug21895-static to test list. Added rules to build test tst-setjmp-bug21895-static. Added module setjmp-bug21895 and rules to build a shared object from it. * sysdeps/powerpc/powerpc64/setjmp-bug21895.c: New test file. * sysdeps/powerpc/powerpc64/tst-setjmp-bug21895-static.c: New test file. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
62 lines
2.2 KiB
Makefile
62 lines
2.2 KiB
Makefile
# Powerpc64 specific build options.
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# this is ./sysdeps/powerpc/powerpc64/Makefile
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# Each TOC entry takes 8 bytes and the TOC holds up to 2^16 bytes,
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# or 8192 entries.
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# If -fpic is not specified, the latest gcc-3.2.1 now generates
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# different code for call stubs (without the TOC reload).
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# Shared objects need the TOC reload so specify -fpic.
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ifeq (yes,$(build-shared))
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pic-ccflag = -fpic
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endif
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# These flags prevent FPU or Altivec registers from being used,
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# for code called in contexts that is not allowed to touch those registers.
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# Stupid GCC requires us to pass all these ridiculous switches. We need to
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# pass the -mno-* switches as well to prevent the compiler from attempting
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# to emit altivec or vsx instructions, especially when the registers aren't
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# available.
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no-special-regs := $(sort $(foreach n,40 41 50 51 60 61 62 63 \
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$(foreach m,2 3 4 5 6 7 8 9, \
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3$m 4$m 5$m),\
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-ffixed-$n)) \
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$(sort $(foreach n,$(foreach m,0 1 2 3 4 5 6 7 8 9,\
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$m 1$m 2$m) 30 31,\
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-ffixed-v$n)) \
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-ffixed-vrsave -ffixed-vscr -mno-altivec -mno-vsx
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# Need to prevent gcc from using fprs in code used during dynamic linking.
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CFLAGS-dl-runtime.os = $(no-special-regs)
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CFLAGS-dl-lookup.os = $(no-special-regs)
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CFLAGS-dl-misc.os = $(no-special-regs)
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CFLAGS-rtld-mempcpy.os = $(no-special-regs)
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CFLAGS-rtld-memmove.os = $(no-special-regs)
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CFLAGS-rtld-memchr.os = $(no-special-regs)
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CFLAGS-rtld-strnlen.os = $(no-special-regs)
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ifeq ($(subdir),elf)
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# help gcc inline asm code from dl-machine.h
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+cflags += -finline-limit=2000
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endif
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ifeq ($(subdir),gmon)
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# The assembly functions assume that fp arg regs are not trashed.
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# Compiling with -msoft-float ensures that fp regs are not used
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# for moving memory around.
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CFLAGS-mcount.c += $(no-special-regs)
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sysdep_routines += ppc-mcount
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endif
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ifeq ($(subdir),setjmp)
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tests += tst-setjmp-bug21895-static
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tests-static += tst-setjmp-bug21895-static
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modules-names += setjmp-bug21895
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$(objpfx)tst-setjmp-bug21895-static: $(common-objpfx)dlfcn/libdl.a
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$(objpfx)tst-setjmp-bug21895-static.out: $(objpfx)setjmp-bug21895.so
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tst-setjmp-bug21895-static-ENV = \
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LD_LIBRARY_PATH=$(objpfx):$(common-objpfx):$(common-objpfx)setjmp:$(common-objpfx)elf
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endif
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