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
elf_core_copy_regs(elf_gregset_t * elfregs,struct pt_regs * regs)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
elf_core_copy_kernel_regs(elf_gregset_t * elfregs,struct pt_regs * regs)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
elf_core_copy_task_regs(struct task_struct * t,elf_gregset_t * elfregs)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
elf_core_copy_task_fpregs(struct task_struct * t,struct pt_regs * regs,elf_fpregset_t * fpu)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
elf_core_extra_phdrs(void)123 static inline Elf_Half elf_core_extra_phdrs(void)
124 {
125 return 0;
126 }
127
elf_core_write_extra_phdrs(struct coredump_params * cprm,loff_t offset)128 static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
129 {
130 return 1;
131 }
132
elf_core_write_extra_data(struct coredump_params * cprm)133 static inline int elf_core_write_extra_data(struct coredump_params *cprm)
134 {
135 return 1;
136 }
137
elf_core_extra_data_size(void)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
