https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101905
Bug ID: 101905
Summary: Missed debug information for global register variable
Product: gcc
Version: 9.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: yuri.karlsbrun at broadcom dot com
Target Milestone: ---
file evi.c:
register void* regVar asm ("r15");
int
main()
{
char *str = "Hello";
regVar = str;
return 0;
}
% gcc -v
Using built-in specs.
COLLECT_GCC=/tools/oss/packages/x86_64-centos7/gcc/9.3.0/bin/gcc
COLLECT_LTO_WRAPPER=/tools/oss/packages/x86_64-rhel7/gcc/9.3.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/9.3.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../../gcc-9.3.0/configure
--prefix=/tools/oss/packages/x86_64-centos7/gcc/9.3.0 --with-gnu-as
--with-as=/tools/bin/as --with-gnu-ld --with-ld=/tools/bin/ld
--with-mpc=/tools/oss/packages/x86_64-centos7/mpc/1.0.3
--with-mpfr=/tools/oss/packages/x86_64-centos7/mpfr/3.1.2
--enable-languages=c,c++,objc --enable-symvers=gnu
Thread model: posix
gcc version 9.3.0 (GCC)
% gcc -g3 evi.c -o evi
% gdb evi
(gdb) list
1 register void* regVar asm ("r15");
2 int
3 main()
4 {
5 char *str = "Hello";
6 regVar = str;
7 return 0;
8 }
(gdb) b 7
Breakpoint 1 at 0x400502: file evi.c, line 7.
(gdb) r
Starting program: evi
Breakpoint 1, main () at evi.c:7
7 return 0;
(gdb) p regVar
Missing ELF symbol "regVar".
(gdb) p str
$1 = 0x400594 "Hello"
(gdb) p/x $r15
$2 = 0x400594
(gdb) p (char *)$r15
$3 = 0x400594 "Hello"
I tried it for ARM architecture as well with the same result.
Thanks,
Yuri
