elfcore.h (4154B)
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_common 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}; 47 48struct elf_prstatus 49{ 50 struct elf_prstatus_common common; 51 elf_gregset_t pr_reg; /* GP registers */ 52 int pr_fpvalid; /* True if math co-processor being used. */ 53}; 54 55#define ELF_PRARGSZ (80) /* Number of chars for args */ 56 57struct elf_prpsinfo 58{ 59 char pr_state; /* numeric process state */ 60 char pr_sname; /* char for pr_state */ 61 char pr_zomb; /* zombie */ 62 char pr_nice; /* nice val */ 63 unsigned long pr_flag; /* flags */ 64 __kernel_uid_t pr_uid; 65 __kernel_gid_t pr_gid; 66 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; 67 /* Lots missing */ 68 /* 69 * The hard-coded 16 is derived from TASK_COMM_LEN, but it can't be 70 * changed as it is exposed to userspace. We'd better make it hard-coded 71 * here. 72 */ 73 char pr_fname[16]; /* filename of executable */ 74 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ 75}; 76 77static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs) 78{ 79#ifdef ELF_CORE_COPY_REGS 80 ELF_CORE_COPY_REGS((*elfregs), regs) 81#else 82 BUG_ON(sizeof(*elfregs) != sizeof(*regs)); 83 *(struct pt_regs *)elfregs = *regs; 84#endif 85} 86 87static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs) 88{ 89#if defined (ELF_CORE_COPY_TASK_REGS) 90 return ELF_CORE_COPY_TASK_REGS(t, elfregs); 91#elif defined (task_pt_regs) 92 elf_core_copy_regs(elfregs, task_pt_regs(t)); 93#endif 94 return 0; 95} 96 97extern int dump_fpu (struct pt_regs *, elf_fpregset_t *); 98 99static inline int elf_core_copy_task_fpregs(struct task_struct *t, struct pt_regs *regs, elf_fpregset_t *fpu) 100{ 101#ifdef ELF_CORE_COPY_FPREGS 102 return ELF_CORE_COPY_FPREGS(t, fpu); 103#else 104 return dump_fpu(regs, fpu); 105#endif 106} 107 108#ifdef CONFIG_ARCH_BINFMT_ELF_EXTRA_PHDRS 109/* 110 * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out 111 * extra segments containing the gate DSO contents. Dumping its 112 * contents makes post-mortem fully interpretable later without matching up 113 * the same kernel and hardware config to see what PC values meant. 114 * Dumping its extra ELF program headers includes all the other information 115 * a debugger needs to easily find how the gate DSO was being used. 116 */ 117extern Elf_Half elf_core_extra_phdrs(void); 118extern int 119elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset); 120extern int 121elf_core_write_extra_data(struct coredump_params *cprm); 122extern size_t elf_core_extra_data_size(void); 123#else 124static inline Elf_Half elf_core_extra_phdrs(void) 125{ 126 return 0; 127} 128 129static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset) 130{ 131 return 1; 132} 133 134static inline int elf_core_write_extra_data(struct coredump_params *cprm) 135{ 136 return 1; 137} 138 139static inline size_t elf_core_extra_data_size(void) 140{ 141 return 0; 142} 143#endif /* CONFIG_ARCH_BINFMT_ELF_EXTRA_PHDRS */ 144 145#endif /* _LINUX_ELFCORE_H */