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 | /* |
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 | |
77 | static 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 | |
87 | static 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 | #else |
92 | elf_core_copy_regs(elfregs, task_pt_regs(t)); |
93 | #endif |
94 | return 0; |
95 | } |
96 | |
97 | int elf_core_copy_task_fpregs(struct task_struct *t, elf_fpregset_t *fpu); |
98 | |
99 | #ifdef CONFIG_ARCH_BINFMT_ELF_EXTRA_PHDRS |
100 | /* |
101 | * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out |
102 | * extra segments containing the gate DSO contents. Dumping its |
103 | * contents makes post-mortem fully interpretable later without matching up |
104 | * the same kernel and hardware config to see what PC values meant. |
105 | * Dumping its extra ELF program headers includes all the other information |
106 | * a debugger needs to easily find how the gate DSO was being used. |
107 | */ |
108 | extern Elf_Half elf_core_extra_phdrs(struct coredump_params *cprm); |
109 | extern int |
110 | elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset); |
111 | extern int |
112 | elf_core_write_extra_data(struct coredump_params *cprm); |
113 | extern size_t elf_core_extra_data_size(struct coredump_params *cprm); |
114 | #else |
115 | static inline Elf_Half (struct coredump_params *cprm) |
116 | { |
117 | return 0; |
118 | } |
119 | |
120 | static inline int (struct coredump_params *cprm, loff_t offset) |
121 | { |
122 | return 1; |
123 | } |
124 | |
125 | static inline int (struct coredump_params *cprm) |
126 | { |
127 | return 1; |
128 | } |
129 | |
130 | static inline size_t (struct coredump_params *cprm) |
131 | { |
132 | return 0; |
133 | } |
134 | #endif /* CONFIG_ARCH_BINFMT_ELF_EXTRA_PHDRS */ |
135 | |
136 | #endif /* _LINUX_ELFCORE_H */ |
137 | |