[Bug target/65804] New: blackfin: Not support global frame pointer with -fno-omit-frame-pointer
gang.chen.5i5j at gmail dot com
gcc-bugzilla@gcc.gnu.org
Sun Apr 19 04:46:00 GMT 2015
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65804
Bug ID: 65804
Summary: blackfin: Not support global frame pointer with
-fno-omit-frame-pointer
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: gang.chen.5i5j at gmail dot com
The code:
[root@localhost gcc]# cat stacktrace.i
register unsigned long current_frame_pointer asm("FP");
void save_stack_trace(void)
{
unsigned long fp;
fp = current_frame_pointer;
}
For gcc5 from upstream (cause issue):
[root@localhost gcc]# /upstream/release-blackfin/bin/bfin-gchen-elf-gcc
-mcpu=bf533-0.3 -fno-omit-frame-pointer -pg -c stacktrace.i
stacktrace.i: In function 'save_stack_trace':
stacktrace.i:3:6: error: frame pointer required, but reserved
void save_stack_trace(void)
^
stacktrace.i:1:24: note: for 'current_frame_pointer'
register unsigned long current_frame_pointer asm("FP");
^
[root@localhost linux-next]#
/upstream/release-blackfin/bin/bfin-gchen-elf-gcc -v
Using built-in specs.
COLLECT_GCC=/upstream/release-blackfin/bin/bfin-gchen-elf-gcc
COLLECT_LTO_WRAPPER=/upstream/release-blackfin/libexec/gcc/bfin-gchen-elf/5.0.0/lto-wrapper
Target: bfin-gchen-elf
Configured with: ../gcc-blackfin/configure --target=bfin-gchen-elf
--disable-nls --disable-threads --disable-shared --disable-libquadmath
--disable-libgomp --disable-libatomic --prefix=/upstream/release-blackfin
--without-headers target_alias=bfin-gchen-elf --enable-languages=c
Thread model: single
gcc version 5.0.0 20150401 (experimental) (GCC)
For blackfin gcc4.5.4 from soureforge (no issue):
root@gchen:/upstream/linux-next# /3p/release-blackfin/bin/bfin-gchen-elf-gcc
-mcpu=bf533-0.3 -fno-omit-frame-pointer -pg -c stacktrace.i
root@gchen:/upstream/linux-next# /3p/release-blackfin/bin/bfin-gchen-elf-gcc
-v
Using built-in specs.
COLLECT_GCC=/3p/release-blackfin/bin/bfin-gchen-elf-gcc
COLLECT_LTO_WRAPPER=/3p/release-blackfin/libexec/gcc/bfin-gchen-elf/4.5.4/lto-wrapper
Target: bfin-gchen-elf
Configured with: ../gcc/configure --target=bfin-gchen-elf --disable-nls
--disable-threads --disable-shared --disable-libssp --disable-libquadmath
--disable-libgomp --disable-libatomic --prefix=/upstream/release-blackfin
--without-headers --enable-languages=c : (reconfigured) ../gcc/configure
--target=bfin-gchen-elf --disable-nls --disable-threads --disable-shared
--disable-libssp --disable-libquadmath --disable-libgomp --disable-libatomic
--prefix=/3p/release-blackfin --without-headers --enable-languages=c
Thread model: single
gcc version 4.5.4 (GCC)
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