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glibc/sysdeps/powerpc/powerpc64/tst-audit.h

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Move testsuite audit definitions to sysdeps tst-audit.h files.
2012-07-26 11:29:07 +00:00
/* Definitions for testing PLT entry/exit auditing. PowerPC64 version.
Update copyright dates with scripts/update-copyrights.
2017-01-01 00:14:16 +00:00
Copyright (C) 2012-2017 Free Software Foundation, Inc.
Move testsuite audit definitions to sysdeps tst-audit.h files.
2012-07-26 11:29:07 +00:00
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
PowerPC64 ELFv2 ABI 5/6: LD_AUDIT interface changes The ELFv2 ABI changes the calling convention by passing and returning structures in registers in more cases than the old ABI: http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01145.html http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01147.html For the most part, this does not affect glibc, since glibc assembler files do not use structure parameters / return values. However, one place is affected: the LD_AUDIT interface provides a structure to the audit routine that contains all registers holding function argument and return values for the intercepted PLT call. Since the new ABI now sometimes uses registers to return values that were never used for this purpose in the old ABI, this structure has to be extended. To force audit routines to be modified for the new ABI if necessary, the patch defines v2 variants of the la_ppc64 types and routines. In addition, the patch contains two unrelated changes to the PLT trampoline routines: it fixes a bug where FPR return values were stored in the wrong place, and it removes the unnecessary save/restore of CR.
2013-12-04 12:59:37 +00:00
#if _CALL_ELF != 2
Move testsuite audit definitions to sysdeps tst-audit.h files.
2012-07-26 11:29:07 +00:00
#define pltenter la_ppc64_gnu_pltenter
#define pltexit la_ppc64_gnu_pltexit
#define La_regs La_ppc64_regs
#define La_retval La_ppc64_retval
#define int_retval lrv_r3
PowerPC64 ELFv2 ABI 5/6: LD_AUDIT interface changes The ELFv2 ABI changes the calling convention by passing and returning structures in registers in more cases than the old ABI: http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01145.html http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01147.html For the most part, this does not affect glibc, since glibc assembler files do not use structure parameters / return values. However, one place is affected: the LD_AUDIT interface provides a structure to the audit routine that contains all registers holding function argument and return values for the intercepted PLT call. Since the new ABI now sometimes uses registers to return values that were never used for this purpose in the old ABI, this structure has to be extended. To force audit routines to be modified for the new ABI if necessary, the patch defines v2 variants of the la_ppc64 types and routines. In addition, the patch contains two unrelated changes to the PLT trampoline routines: it fixes a bug where FPR return values were stored in the wrong place, and it removes the unnecessary save/restore of CR.
2013-12-04 12:59:37 +00:00
#else
#define pltenter la_ppc64v2_gnu_pltenter
#define pltexit la_ppc64v2_gnu_pltexit
#define La_regs La_ppc64v2_regs
#define La_retval La_ppc64v2_retval
#define int_retval lrv_r3
#endif
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