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_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 48 struct 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 57 struct 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 char pr_fname[16]; /* filename of executable */ 69 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ 70 }; 71 72 static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs) 73 { 74 #ifdef ELF_CORE_COPY_REGS 75 ELF_CORE_COPY_REGS((*elfregs), regs) 76 #else 77 BUG_ON(sizeof(*elfregs) != sizeof(*regs)); 78 *(struct pt_regs *)elfregs = *regs; 79 #endif 80 } 81 82 static inline void elf_core_copy_kernel_regs(elf_gregset_t *elfregs, struct pt_regs *regs) 83 { 84 #ifdef ELF_CORE_COPY_KERNEL_REGS 85 ELF_CORE_COPY_KERNEL_REGS((*elfregs), regs); 86 #else 87 elf_core_copy_regs(elfregs, regs); 88 #endif 89 } 90 91 static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs) 92 { 93 #if defined (ELF_CORE_COPY_TASK_REGS) 94 return ELF_CORE_COPY_TASK_REGS(t, elfregs); 95 #elif defined (task_pt_regs) 96 elf_core_copy_regs(elfregs, task_pt_regs(t)); 97 #endif 98 return 0; 99 } 100 101 extern int dump_fpu (struct pt_regs *, elf_fpregset_t *); 102 103 static inline int elf_core_copy_task_fpregs(struct task_struct *t, struct pt_regs *regs, elf_fpregset_t *fpu) 104 { 105 #ifdef ELF_CORE_COPY_FPREGS 106 return ELF_CORE_COPY_FPREGS(t, fpu); 107 #else 108 return dump_fpu(regs, fpu); 109 #endif 110 } 111 112 #if defined(CONFIG_UM) || defined(CONFIG_IA64) 113 /* 114 * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out 115 * extra segments containing the gate DSO contents. Dumping its 116 * contents makes post-mortem fully interpretable later without matching up 117 * the same kernel and hardware config to see what PC values meant. 118 * Dumping its extra ELF program headers includes all the other information 119 * a debugger needs to easily find how the gate DSO was being used. 120 */ 121 extern Elf_Half elf_core_extra_phdrs(void); 122 extern int 123 elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset); 124 extern int 125 elf_core_write_extra_data(struct coredump_params *cprm); 126 extern size_t elf_core_extra_data_size(void); 127 #else 128 static inline Elf_Half elf_core_extra_phdrs(void) 129 { 130 return 0; 131 } 132 133 static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset) 134 { 135 return 1; 136 } 137 138 static inline int elf_core_write_extra_data(struct coredump_params *cprm) 139 { 140 return 1; 141 } 142 143 static inline size_t elf_core_extra_data_size(void) 144 { 145 return 0; 146 } 147 #endif 148 149 #endif /* _LINUX_ELFCORE_H */ 150