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41f67ccbe9
This patch enables the option to influence hwcaps and stfle bits used by the s390 specific ifunc-resolvers. The currently x86-specific tunable glibc.cpu.hwcaps is also used on s390x to achieve the task. In addition the user can also set a CPU arch-level like z13 instead of single HWCAP and STFLE features. Note that the tunable only handles the features which are really used in the IFUNC-resolvers. All others are ignored as the values are only used inside glibc. Thus we can influence: - HWCAP_S390_VXRS (z13) - HWCAP_S390_VXRS_EXT (z14) - HWCAP_S390_VXRS_EXT2 (z15) - STFLE_MIE3 (z15) The influenced hwcap/stfle-bits are stored in the s390-specific cpu_features struct which also contains reserved fields for future usage. The ifunc-resolvers and users of stfle bits are adjusted to use the information from cpu_features struct. On 31bit, the ELF_MACHINE_IRELATIVE macro is now also defined. Otherwise the new ifunc-resolvers segfaults as they depend on the not yet processed_rtld_global_ro@GLIBC_PRIVATE relocation.
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/* Run-time dynamic linker data structures for loaded ELF shared objects.
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Copyright (C) 1995-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _S390_LDSODEFS_H
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#define _S390_LDSODEFS_H 1
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#include <elf.h>
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#include <cpu-features.h>
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struct La_s390_32_regs;
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struct La_s390_32_retval;
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struct La_s390_64_regs;
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struct La_s390_64_retval;
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#define ARCH_PLTENTER_MEMBERS \
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Elf32_Addr (*s390_32_gnu_pltenter) (Elf32_Sym *, unsigned int, \
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uintptr_t *, \
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uintptr_t *, \
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struct La_s390_32_regs *, \
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unsigned int *, const char *name, \
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long int *framesizep); \
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Elf64_Addr (*s390_64_gnu_pltenter) (Elf64_Sym *, unsigned int, \
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uintptr_t *, \
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uintptr_t *, \
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struct La_s390_64_regs *, \
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unsigned int *, const char *name, \
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long int *framesizep)
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#define ARCH_PLTEXIT_MEMBERS \
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unsigned int (*s390_32_gnu_pltexit) (Elf32_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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const struct La_s390_32_regs *, \
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struct La_s390_32_retval *, \
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const char *); \
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unsigned int (*s390_64_gnu_pltexit) (Elf64_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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const struct La_s390_64_regs *, \
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struct La_s390_64_retval *, \
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const char *)
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#include_next <ldsodefs.h>
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#endif
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