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Raphael Moreira Zinsly 8d71d3a317 libgcc: Fix backtrace fallback on PowerPC Big-endian 
At the end of the backtrace stream _Unwind_Find_FDE() may not be able
to find the frame unwind info and will later call the backtrace fallback
instead of finishing. This occurs when using an old libc on ppc64 due to
dl_iterate_phdr() not being able to set the fde in the last trace.
When this occurs the cfa of the trace will be behind of context's cfa.
Also, libgo’s probestackmaps() calls the backtrace with a null pointer
and can get to the backchain fallback with the same problem, in this case
we are only interested in find a stack map, we don't need nor can do a
backchain.
_Unwind_ForcedUnwind_Phase2() can hit the same issue as it uses
uw_frame_state_for(), so we need to treat _URC_NORMAL_STOP.

libgcc/ChangeLog:
	PR libgcc/103044
	* config/rs6000/linux-unwind.h (ppc_backchain_fallback): Check if it's
	called with a null argument or at the end of the backtrace and return.
	* unwind.inc (_Unwind_ForcedUnwind_Phase2): Treat _URC_NORMAL_STOP.
 		2021-11-11 15:29:25 +00:00
..
aarch64 libgcc: Add missing runtime exception notices 2021-08-31 10:56:34 +01:00
alpha Update copyright years. 2021-01-04 10:26:59 +01:00
arc Update copyright years. 2021-01-04 10:26:59 +01:00
arm arm: add erratum mitigation to __gnu_cmse_nonsecure_call [PR102035] 2021-08-24 11:45:13 +01:00
avr Update copyright years. 2021-01-04 10:26:59 +01:00
bfin Update copyright years. 2021-01-04 10:26:59 +01:00
bpf
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c6x Update copyright years. 2021-01-04 10:26:59 +01:00
cr16 Update copyright years. 2021-01-04 10:26:59 +01:00
cris Update copyright years. 2021-01-04 10:26:59 +01:00
csky Update copyright years. 2021-01-04 10:26:59 +01:00
epiphany Update copyright years. 2021-01-04 10:26:59 +01:00
fr30 Update copyright years. 2021-01-04 10:26:59 +01:00
frv libgcc: Add missing runtime exception notices 2021-08-31 10:56:34 +01:00
ft32 Update copyright years. 2021-01-04 10:26:59 +01:00
gcn amdgcn: Enable support for TImode for AMD GCN 2021-06-29 08:19:56 -07:00
h8300 Update copyright years. 2021-01-04 10:26:59 +01:00
i386 Darwin, crts: Fix a build warning. 2021-11-05 20:48:05 +00:00
ia64 Update copyright years. 2021-01-04 10:26:59 +01:00
iq2000 Update copyright years. 2021-01-04 10:26:59 +01:00
libbid Update copyright years. 2021-01-04 10:26:59 +01:00
lm32 Update copyright years. 2021-01-04 10:26:59 +01:00
m32c Update copyright years. 2021-01-04 10:26:59 +01:00
m32r Remove m32r{,le}-*-linux* support from GCC 2021-09-13 15:16:56 +00:00
m68k Update copyright years. 2021-01-04 10:26:59 +01:00
mcore Update copyright years. 2021-01-04 10:26:59 +01:00
microblaze Update copyright years. 2021-01-04 10:26:59 +01:00
mips Update copyright years. 2021-01-04 10:26:59 +01:00
mmix Update copyright years. 2021-01-04 10:26:59 +01:00
moxie Update copyright years. 2021-01-04 10:26:59 +01:00
msp430 Update copyright years. 2021-01-04 10:26:59 +01:00
nds32 Update copyright years. 2021-01-04 10:26:59 +01:00
nios2 Update copyright years. 2021-01-04 10:26:59 +01:00
nvptx Update copyright years. 2021-01-04 10:26:59 +01:00
or1k or1k: Update FPU to specify detect tininess before rounding 2021-10-23 05:57:16 +09:00
pa Support TI mode and soft float on PA64 2021-11-05 16:07:35 +00:00
pdp11
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pru libgcc: pru: Place mpyll into its own section 2021-05-13 23:11:01 +03:00
riscv RISC-V: Update soft-fp config for big-endian 2021-03-23 17:31:13 +08:00
rl78 Update copyright years. 2021-01-04 10:26:59 +01:00
rs6000 libgcc: Fix backtrace fallback on PowerPC Big-endian 2021-11-11 15:29:25 +00:00
rx Update copyright years. 2021-01-04 10:26:59 +01:00
s390 libgcc: use .init_stack for constructors if available 2021-10-07 20:24:43 -07:00
score Update copyright years. 2021-01-04 10:26:59 +01:00
sh Update copyright years. 2021-01-04 10:26:59 +01:00
sol2 Update copyright years. 2021-01-04 10:26:59 +01:00
sparc Update copyright years. 2021-01-04 10:26:59 +01:00
stormy16 Update copyright years. 2021-01-04 10:26:59 +01:00
tilegx
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tilepro Update copyright years. 2021-01-04 10:26:59 +01:00
v850 Update copyright years. 2021-01-04 10:26:59 +01:00
vax Update copyright years. 2021-01-04 10:26:59 +01:00
visium Update copyright years. 2021-01-04 10:26:59 +01:00
vms Update copyright years. 2021-01-04 10:26:59 +01:00
xtensa Update copyright years. 2021-01-04 10:26:59 +01:00
darwin-64.c Update copyright years. 2021-01-04 10:26:59 +01:00
darwin-crt-tm.c Update copyright years. 2021-01-04 10:26:59 +01:00
darwin-crt3.c Update copyright years. 2021-01-04 10:26:59 +01:00
darwin10-unwind-find-enc-func.c Darwin, crts: Fix a build warning. 2021-11-05 20:48:05 +00:00
gthr-lynx.h Update copyright years. 2021-01-04 10:26:59 +01:00
gthr-rtems.h Update copyright years. 2021-01-04 10:26:59 +01:00
gthr-vxworks-cond.c Update copyright years. 2021-01-04 10:26:59 +01:00
gthr-vxworks-thread.c Update copyright years. 2021-01-04 10:26:59 +01:00
gthr-vxworks-tls.c Update copyright years. 2021-01-04 10:26:59 +01:00
gthr-vxworks.c Update copyright years. 2021-01-04 10:26:59 +01:00
gthr-vxworks.h Update copyright years. 2021-01-04 10:26:59 +01:00
hardfp.c Update copyright years. 2021-01-04 10:26:59 +01:00
libgcc-glibc.ver Update copyright years. 2021-01-04 10:26:59 +01:00
libgcc-libsystem.ver
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no-sfp-machine.h
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no-unwind.h
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t-crtfm
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t-crtstuff-pic
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t-darwin libgcc, X86, Darwin: Handle symbols for HF cases. 2021-09-19 19:41:31 +01:00
t-dfprules
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t-eh-dw2-dip
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t-fdpbit
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t-fixedpoint-gnu-prefix
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t-fpbit
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t-freebsd-thread
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t-gnu-prefix
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t-gthr-noweak
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t-gthr-vxworks
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t-gthr-vxworksae
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t-hardfp Update copyright years. 2021-01-04 10:26:59 +01:00
t-hardfp-sfdf Update copyright years. 2021-01-04 10:26:59 +01:00
t-libgcc-pic
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t-libunwind
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t-libunwind-elf Update copyright years. 2021-01-04 10:26:59 +01:00
t-linux
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t-openbsd-thread
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t-rtems
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t-slibgcc libgcc: Honor LDFLAGS_FOR_TARGET when linking libgcc_s 2021-08-05 17:32:06 +02:00
t-slibgcc-darwin libgcc, Darwin: Remove unused symlinks. 2021-09-19 19:47:19 +01:00
t-slibgcc-elf-ver
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t-slibgcc-fuchsia libgcc: Honor LDFLAGS_FOR_TARGET when linking libgcc_s 2021-08-05 17:32:06 +02:00
t-slibgcc-gld
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t-slibgcc-gld-nover
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t-slibgcc-hpux
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t-slibgcc-libgcc Update copyright years. 2021-01-04 10:26:59 +01:00
t-slibgcc-nolc-override
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t-slibgcc-sld
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t-slibgcc-vms libgcc: Honor LDFLAGS_FOR_TARGET when linking libgcc_s 2021-08-05 17:32:06 +02:00
t-softfp Update copyright years. 2021-01-04 10:26:59 +01:00
t-softfp-compat
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t-softfp-excl
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t-softfp-sfdf
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t-softfp-sfdftf
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t-softfp-tf
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t-stack
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t-tls
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t-vxcrtstuff Fix the vxworks crtstuff handling of kernel/rtp variations 2020-10-16 15:33:35 +00:00
t-vxworks introduce overridable clear_cache emitter 2020-12-02 22:10:32 -03:00
t-vxworks7 introduce overridable clear_cache emitter 2020-12-02 22:10:32 -03:00
t-vxworksae
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unwind-dw2-fde-darwin.c Update copyright years. 2021-01-04 10:26:59 +01:00
vxcrtstuff.c
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