OpenE2K
/
binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
binutils-gdb/gdb/testsuite/gdb.base/gnu-ifunc-lib.c

36 lines
1.1 KiB
C
Raw Normal View History

gdb/testsuite/ Test STT_GNU_IFUNC support. * gdb.base/gnu-ifunc-lib.c: New file. * gdb.base/gnu-ifunc.c: New file. * gdb.base/gnu-ifunc.exp: New file.
2011-03-28 22:31:54 +02:00
/* This testcase is part of GDB, the GNU debugger.
Update copyright year range in all GDB files gdb/ChangeLog: Update copyright year range in all GDB files
2018-01-01 05:43:02 +01:00
Copyright 2009-2018 Free Software Foundation, Inc.
gdb/testsuite/ Test STT_GNU_IFUNC support. * gdb.base/gnu-ifunc-lib.c: New file. * gdb.base/gnu-ifunc.c: New file. * gdb.base/gnu-ifunc.exp: New file.
2011-03-28 22:31:54 +02:00
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
extern volatile int gnu_ifunc_initialized;
Pass HWCAP to ifunc resolver On various GNU Elf architectures, including AArch64, ARM, s390/s390x, ppc32/64, and sparc32/64, the dynamic loader passes HWCAP as a parameter to each ifunc resolver. Currently there is an open glibc Bugzilla that requests this to be generalized to all architectures: https://sourceware.org/bugzilla/show_bug.cgi?id=19766 And various ifunc resolvers already rely on receiving HWCAP. Currently GDB always calls an ifunc resolver without any arguments; thus the resolver may receive garbage, and based on that, the resolver may decide to return a function that is not suited for the given platform. This patch always passes HWCAP to ifunc resolvers, even on systems where the dynamic loader currently behaves otherwise. The rationale is that (1) the dynamic loader may get adjusted on those systems as well in the future; (2) passing an unused argument should not cause a problem with existing resolvers; and (3) the logic is much simpler without such a distinction. gdb/ChangeLog: * elfread.c (auxv.h): New include. (elf_gnu_ifunc_resolve_addr): Pass HWCAP to ifunc resolver. gdb/testsuite/ChangeLog: * gdb.base/gnu-ifunc-lib.c (resolver_hwcap): New external variable declaration. (gnu_ifunc): Add parameter hwcap. Store it in resolver_hwcap. * gdb.base/gnu-ifunc.c (resolver_hwcap): New global variable. * gdb.base/gnu-ifunc.exp: Add test to verify that the resolver received HWCAP as its argument.
2016-09-09 19:59:53 +02:00
extern volatile unsigned long resolver_hwcap;
gdb/testsuite/ Test STT_GNU_IFUNC support. * gdb.base/gnu-ifunc-lib.c: New file. * gdb.base/gnu-ifunc.c: New file. * gdb.base/gnu-ifunc.exp: New file.
2011-03-28 22:31:54 +02:00
extern int init_stub (int arg);
extern int final (int arg);
typedef int (*final_t) (int arg);
gdb/testsuite/gdb.base/gnu-ifunc-lib.c: Use %function syntax. ARM uses @ as a comment character, but % seems to be usable by all existing ifunc enabled architectures. gdb/testsuite/ChangeLog: 2013-07-05 Will Newton <will.newton@linaro.org> * gdb.base/gnu-ifunc-lib.c: Use %function instead of @function in asm syntax to allow building on ARM.
2013-07-05 12:40:10 +02:00
asm (".type gnu_ifunc, %gnu_indirect_function");
gdb/testsuite/ Test STT_GNU_IFUNC support. * gdb.base/gnu-ifunc-lib.c: New file. * gdb.base/gnu-ifunc.c: New file. * gdb.base/gnu-ifunc.exp: New file.
2011-03-28 22:31:54 +02:00
final_t
Pass HWCAP to ifunc resolver On various GNU Elf architectures, including AArch64, ARM, s390/s390x, ppc32/64, and sparc32/64, the dynamic loader passes HWCAP as a parameter to each ifunc resolver. Currently there is an open glibc Bugzilla that requests this to be generalized to all architectures: https://sourceware.org/bugzilla/show_bug.cgi?id=19766 And various ifunc resolvers already rely on receiving HWCAP. Currently GDB always calls an ifunc resolver without any arguments; thus the resolver may receive garbage, and based on that, the resolver may decide to return a function that is not suited for the given platform. This patch always passes HWCAP to ifunc resolvers, even on systems where the dynamic loader currently behaves otherwise. The rationale is that (1) the dynamic loader may get adjusted on those systems as well in the future; (2) passing an unused argument should not cause a problem with existing resolvers; and (3) the logic is much simpler without such a distinction. gdb/ChangeLog: * elfread.c (auxv.h): New include. (elf_gnu_ifunc_resolve_addr): Pass HWCAP to ifunc resolver. gdb/testsuite/ChangeLog: * gdb.base/gnu-ifunc-lib.c (resolver_hwcap): New external variable declaration. (gnu_ifunc): Add parameter hwcap. Store it in resolver_hwcap. * gdb.base/gnu-ifunc.c (resolver_hwcap): New global variable. * gdb.base/gnu-ifunc.exp: Add test to verify that the resolver received HWCAP as its argument.
2016-09-09 19:59:53 +02:00
gnu_ifunc (unsigned long hwcap)
gdb/testsuite/ Test STT_GNU_IFUNC support. * gdb.base/gnu-ifunc-lib.c: New file. * gdb.base/gnu-ifunc.c: New file. * gdb.base/gnu-ifunc.exp: New file.
2011-03-28 22:31:54 +02:00
{
Pass HWCAP to ifunc resolver On various GNU Elf architectures, including AArch64, ARM, s390/s390x, ppc32/64, and sparc32/64, the dynamic loader passes HWCAP as a parameter to each ifunc resolver. Currently there is an open glibc Bugzilla that requests this to be generalized to all architectures: https://sourceware.org/bugzilla/show_bug.cgi?id=19766 And various ifunc resolvers already rely on receiving HWCAP. Currently GDB always calls an ifunc resolver without any arguments; thus the resolver may receive garbage, and based on that, the resolver may decide to return a function that is not suited for the given platform. This patch always passes HWCAP to ifunc resolvers, even on systems where the dynamic loader currently behaves otherwise. The rationale is that (1) the dynamic loader may get adjusted on those systems as well in the future; (2) passing an unused argument should not cause a problem with existing resolvers; and (3) the logic is much simpler without such a distinction. gdb/ChangeLog: * elfread.c (auxv.h): New include. (elf_gnu_ifunc_resolve_addr): Pass HWCAP to ifunc resolver. gdb/testsuite/ChangeLog: * gdb.base/gnu-ifunc-lib.c (resolver_hwcap): New external variable declaration. (gnu_ifunc): Add parameter hwcap. Store it in resolver_hwcap. * gdb.base/gnu-ifunc.c (resolver_hwcap): New global variable. * gdb.base/gnu-ifunc.exp: Add test to verify that the resolver received HWCAP as its argument.
2016-09-09 19:59:53 +02:00
resolver_hwcap = hwcap;
gdb/testsuite/ Test STT_GNU_IFUNC support. * gdb.base/gnu-ifunc-lib.c: New file. * gdb.base/gnu-ifunc.c: New file. * gdb.base/gnu-ifunc.exp: New file.
2011-03-28 22:31:54 +02:00
if (! gnu_ifunc_initialized)
return init_stub;
else
return final;
}