2a6e9df111
commit 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9 upstream. kernel/elfcore.c only contains weak symbols, which triggers a bug with clang in combination with recordmcount: Cannot find symbol for section 2: .text. kernel/elfcore.o: failed Move the empty stubs into linux/elfcore.h as inline functions. As only two architectures use these, just use the architecture specific Kconfig symbols to key off the declaration. Link: https://lkml.kernel.org/r/20201204165742.3815221-2-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Barret Rhoden <brho@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_ELFCORE_H
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#define _LINUX_ELFCORE_H
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#include <linux/user.h>
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#include <linux/bug.h>
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#include <linux/sched/task_stack.h>
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#include <asm/elf.h>
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#include <uapi/linux/elfcore.h>
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struct coredump_params;
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static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
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{
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#ifdef ELF_CORE_COPY_REGS
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ELF_CORE_COPY_REGS((*elfregs), regs)
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#else
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BUG_ON(sizeof(*elfregs) != sizeof(*regs));
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*(struct pt_regs *)elfregs = *regs;
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#endif
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}
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static inline void elf_core_copy_kernel_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
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{
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#ifdef ELF_CORE_COPY_KERNEL_REGS
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ELF_CORE_COPY_KERNEL_REGS((*elfregs), regs);
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#else
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elf_core_copy_regs(elfregs, regs);
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#endif
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}
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static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
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{
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#if defined (ELF_CORE_COPY_TASK_REGS)
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return ELF_CORE_COPY_TASK_REGS(t, elfregs);
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#elif defined (task_pt_regs)
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elf_core_copy_regs(elfregs, task_pt_regs(t));
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#endif
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return 0;
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}
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extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
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static inline int elf_core_copy_task_fpregs(struct task_struct *t, struct pt_regs *regs, elf_fpregset_t *fpu)
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{
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#ifdef ELF_CORE_COPY_FPREGS
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return ELF_CORE_COPY_FPREGS(t, fpu);
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#else
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return dump_fpu(regs, fpu);
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#endif
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}
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#ifdef ELF_CORE_COPY_XFPREGS
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static inline int elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
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{
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return ELF_CORE_COPY_XFPREGS(t, xfpu);
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}
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#endif
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#if defined(CONFIG_UM) || defined(CONFIG_IA64)
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/*
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* These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
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* extra segments containing the gate DSO contents. Dumping its
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* contents makes post-mortem fully interpretable later without matching up
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* the same kernel and hardware config to see what PC values meant.
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* Dumping its extra ELF program headers includes all the other information
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* a debugger needs to easily find how the gate DSO was being used.
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*/
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extern Elf_Half elf_core_extra_phdrs(void);
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extern int
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elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
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extern int
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elf_core_write_extra_data(struct coredump_params *cprm);
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extern size_t elf_core_extra_data_size(void);
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#else
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static inline Elf_Half elf_core_extra_phdrs(void)
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{
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return 0;
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}
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static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
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{
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return 1;
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}
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static inline int elf_core_write_extra_data(struct coredump_params *cprm)
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{
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return 1;
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}
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static inline size_t elf_core_extra_data_size(void)
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{
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return 0;
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}
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#endif
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#endif /* _LINUX_ELFCORE_H */
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