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
  12 struct coredump_params;
  13
  14 static 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
  24 static 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
  33 static 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
  43 extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
  44
  45 static 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
  55 static 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  */
  69 extern Elf_Half elf_core_extra_phdrs(void);
  70 extern int
  71 elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
  72 extern int
  73 elf_core_write_extra_data(struct coredump_params *cprm);
  74 extern size_t elf_core_extra_data_size(void);
  75
  76 #endif /* _LINUX_ELFCORE_H */