LXR linux/include/linux/elfcore.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_ELFCORE_H
   3#define _LINUX_ELFCORE_H
   4
   5#include <linux/user.h>
   6#include <linux/bug.h>
   7#include <linux/sched/task_stack.h>
   8
   9#include <asm/elf.h>
  10#include <uapi/linux/elfcore.h>
  11
  12struct coredump_params;
  13
  14static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
  15{
  16#ifdef ELF_CORE_COPY_REGS
  17        ELF_CORE_COPY_REGS((*elfregs), regs)
  18#else
  19        BUG_ON(sizeof(*elfregs) != sizeof(*regs));
  20        *(struct pt_regs *)elfregs = *regs;
  21#endif
  22}
  23
  24static inline void elf_core_copy_kernel_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
  25{
  26#ifdef ELF_CORE_COPY_KERNEL_REGS
  27        ELF_CORE_COPY_KERNEL_REGS((*elfregs), regs);
  28#else
  29        elf_core_copy_regs(elfregs, regs);
  30#endif
  31}
  32
  33static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
  34{
  35#if defined (ELF_CORE_COPY_TASK_REGS)
  36        return ELF_CORE_COPY_TASK_REGS(t, elfregs);
  37#elif defined (task_pt_regs)
  38        elf_core_copy_regs(elfregs, task_pt_regs(t));
  39#endif
  40        return 0;
  41}
  42
  43extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
  44
  45static inline int elf_core_copy_task_fpregs(struct task_struct *t, struct pt_regs *regs, elf_fpregset_t *fpu)
  46{
  47#ifdef ELF_CORE_COPY_FPREGS
  48        return ELF_CORE_COPY_FPREGS(t, fpu);
  49#else
  50        return dump_fpu(regs, fpu);
  51#endif
  52}
  53
  54#ifdef ELF_CORE_COPY_XFPREGS
  55static inline int elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
  56{
  57        return ELF_CORE_COPY_XFPREGS(t, xfpu);
  58}
  59#endif
  60
  61/*
  62 * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
  63 * extra segments containing the gate DSO contents.  Dumping its
  64 * contents makes post-mortem fully interpretable later without matching up
  65 * the same kernel and hardware config to see what PC values meant.
  66 * Dumping its extra ELF program headers includes all the other information
  67 * a debugger needs to easily find how the gate DSO was being used.
  68 */
  69extern Elf_Half elf_core_extra_phdrs(void);
  70extern int
  71elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
  72extern int
  73elf_core_write_extra_data(struct coredump_params *cprm);
  74extern size_t elf_core_extra_data_size(void);
  75
  76#endif /* _LINUX_ELFCORE_H */
  77