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#include <linux/types.h>
   9#include <linux/signal.h>
  10#include <linux/time.h>
  11#include <linux/ptrace.h>
  12#include <linux/fs.h>
  13#include <linux/elf.h>
  14
  15struct coredump_params;
  16
  17struct elf_siginfo
  18{
  19        int     si_signo;                       /* signal number */
  20        int     si_code;                        /* extra code */
  21        int     si_errno;                       /* errno */
  22};
  23
  24/*
  25 * Definitions to generate Intel SVR4-like core files.
  26 * These mostly have the same names as the SVR4 types with "elf_"
  27 * tacked on the front to prevent clashes with linux definitions,
  28 * and the typedef forms have been avoided.  This is mostly like
  29 * the SVR4 structure, but more Linuxy, with things that Linux does
  30 * not support and which gdb doesn't really use excluded.
  31 */
  32struct elf_prstatus
  33{
  34        struct elf_siginfo pr_info;     /* Info associated with signal */
  35        short   pr_cursig;              /* Current signal */
  36        unsigned long pr_sigpend;       /* Set of pending signals */
  37        unsigned long pr_sighold;       /* Set of held signals */
  38        pid_t   pr_pid;
  39        pid_t   pr_ppid;
  40        pid_t   pr_pgrp;
  41        pid_t   pr_sid;
  42        struct __kernel_old_timeval pr_utime;   /* User time */
  43        struct __kernel_old_timeval pr_stime;   /* System time */
  44        struct __kernel_old_timeval pr_cutime;  /* Cumulative user time */
  45        struct __kernel_old_timeval pr_cstime;  /* Cumulative system time */
  46        elf_gregset_t pr_reg;   /* GP registers */
  47        int pr_fpvalid;         /* True if math co-processor being used.  */
  48};
  49
  50#define ELF_PRARGSZ     (80)    /* Number of chars for args */
  51
  52struct elf_prpsinfo
  53{
  54        char    pr_state;       /* numeric process state */
  55        char    pr_sname;       /* char for pr_state */
  56        char    pr_zomb;        /* zombie */
  57        char    pr_nice;        /* nice val */
  58        unsigned long pr_flag;  /* flags */
  59        __kernel_uid_t  pr_uid;
  60        __kernel_gid_t  pr_gid;
  61        pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  62        /* Lots missing */
  63        char    pr_fname[16];   /* filename of executable */
  64        char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  65};
  66
  67static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
  68{
  69#ifdef ELF_CORE_COPY_REGS
  70        ELF_CORE_COPY_REGS((*elfregs), regs)
  71#else
  72        BUG_ON(sizeof(*elfregs) != sizeof(*regs));
  73        *(struct pt_regs *)elfregs = *regs;
  74#endif
  75}
  76
  77static inline void elf_core_copy_kernel_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
  78{
  79#ifdef ELF_CORE_COPY_KERNEL_REGS
  80        ELF_CORE_COPY_KERNEL_REGS((*elfregs), regs);
  81#else
  82        elf_core_copy_regs(elfregs, regs);
  83#endif
  84}
  85
  86static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
  87{
  88#if defined (ELF_CORE_COPY_TASK_REGS)
  89        return ELF_CORE_COPY_TASK_REGS(t, elfregs);
  90#elif defined (task_pt_regs)
  91        elf_core_copy_regs(elfregs, task_pt_regs(t));
  92#endif
  93        return 0;
  94}
  95
  96extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
  97
  98static inline int elf_core_copy_task_fpregs(struct task_struct *t, struct pt_regs *regs, elf_fpregset_t *fpu)
  99{
 100#ifdef ELF_CORE_COPY_FPREGS
 101        return ELF_CORE_COPY_FPREGS(t, fpu);
 102#else
 103        return dump_fpu(regs, fpu);
 104#endif
 105}
 106
 107#if defined(CONFIG_UM) || defined(CONFIG_IA64)
 108/*
 109 * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
 110 * extra segments containing the gate DSO contents.  Dumping its
 111 * contents makes post-mortem fully interpretable later without matching up
 112 * the same kernel and hardware config to see what PC values meant.
 113 * Dumping its extra ELF program headers includes all the other information
 114 * a debugger needs to easily find how the gate DSO was being used.
 115 */
 116extern Elf_Half elf_core_extra_phdrs(void);
 117extern int
 118elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
 119extern int
 120elf_core_write_extra_data(struct coredump_params *cprm);
 121extern size_t elf_core_extra_data_size(void);
 122#else
 123static inline Elf_Half elf_core_extra_phdrs(void)
 124{
 125        return 0;
 126}
 127
 128static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
 129{
 130        return 1;
 131}
 132
 133static inline int elf_core_write_extra_data(struct coredump_params *cprm)
 134{
 135        return 1;
 136}
 137
 138static inline size_t elf_core_extra_data_size(void)
 139{
 140        return 0;
 141}
 142#endif
 143
 144#endif /* _LINUX_ELFCORE_H */
 145