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 15 struct coredump_params; 16 17 struct 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 */ 32 struct 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 52 struct 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 67 static 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 77 static 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 86 static 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 96 extern int dump_fpu (struct pt_regs *, elf_fpregset_t *); 97 98 static 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 */ 116 extern Elf_Half elf_core_extra_phdrs(void); 117 extern int 118 elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset); 119 extern int 120 elf_core_write_extra_data(struct coredump_params *cprm); 121 extern size_t elf_core_extra_data_size(void); 122 #else 123 static inline Elf_Half elf_core_extra_phdrs(void) 124 { 125 return 0; 126 } 127 128 static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset) 129 { 130 return 1; 131 } 132 133 static inline int elf_core_write_extra_data(struct coredump_params *cprm) 134 { 135 return 1; 136 } 137 138 static inline size_t elf_core_extra_data_size(void) 139 { 140 return 0; 141 } 142 #endif 143 144 #endif /* _LINUX_ELFCORE_H */ 145