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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_ELFCORE_H
#define _LINUX_ELFCORE_H
#include <linux/user.h>
#include <linux/bug.h>
#include <linux/sched/task_stack.h>
#include <linux/types.h>
#include <linux/signal.h>
#include <linux/time.h>
#include <linux/ptrace.h>
#include <linux/fs.h>
#include <linux/elf.h>
struct coredump_params;
struct elf_siginfo
{
int si_signo; /* signal number */
int si_code; /* extra code */
int si_errno; /* errno */
};
/*
* Definitions to generate Intel SVR4-like core files.
* These mostly have the same names as the SVR4 types with "elf_"
* tacked on the front to prevent clashes with linux definitions,
* and the typedef forms have been avoided. This is mostly like
* the SVR4 structure, but more Linuxy, with things that Linux does
* not support and which gdb doesn't really use excluded.
*/
struct elf_prstatus_common
{
struct elf_siginfo pr_info; /* Info associated with signal */
short pr_cursig; /* Current signal */
unsigned long pr_sigpend; /* Set of pending signals */
unsigned long pr_sighold; /* Set of held signals */
pid_t pr_pid;
pid_t pr_ppid;
pid_t pr_pgrp;
pid_t pr_sid;
struct __kernel_old_timeval pr_utime; /* User time */
struct __kernel_old_timeval pr_stime; /* System time */
struct __kernel_old_timeval pr_cutime; /* Cumulative user time */
struct __kernel_old_timeval pr_cstime; /* Cumulative system time */
};
struct elf_prstatus
{
struct elf_prstatus_common common;
elf_gregset_t pr_reg; /* GP registers */
int pr_fpvalid; /* True if math co-processor being used. */
};
#define ELF_PRARGSZ (80) /* Number of chars for args */
struct elf_prpsinfo
{
char pr_state; /* numeric process state */
char pr_sname; /* char for pr_state */
char pr_zomb; /* zombie */
char pr_nice; /* nice val */
unsigned long pr_flag; /* flags */
__kernel_uid_t pr_uid;
__kernel_gid_t pr_gid;
pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
/* Lots missing */
/*
* The hard-coded 16 is derived from TASK_COMM_LEN, but it can't be
* changed as it is exposed to userspace. We'd better make it hard-coded
* here.
*/
char pr_fname[16]; /* filename of executable */
char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
};
static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
{
#ifdef ELF_CORE_COPY_REGS
ELF_CORE_COPY_REGS((*elfregs), regs)
#else
BUG_ON(sizeof(*elfregs) != sizeof(*regs));
*(struct pt_regs *)elfregs = *regs;
#endif
}
static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
{
#if defined (ELF_CORE_COPY_TASK_REGS)
return ELF_CORE_COPY_TASK_REGS(t, elfregs);
#elif defined (task_pt_regs)
elf_core_copy_regs(elfregs, task_pt_regs(t));
#endif
return 0;
}
extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
static inline int elf_core_copy_task_fpregs(struct task_struct *t, struct pt_regs *regs, elf_fpregset_t *fpu)
{
#ifdef ELF_CORE_COPY_FPREGS
return ELF_CORE_COPY_FPREGS(t, fpu);
#else
return dump_fpu(regs, fpu);
#endif
}
#ifdef CONFIG_ARCH_BINFMT_ELF_EXTRA_PHDRS
/*
* These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
* extra segments containing the gate DSO contents. Dumping its
* contents makes post-mortem fully interpretable later without matching up
* the same kernel and hardware config to see what PC values meant.
* Dumping its extra ELF program headers includes all the other information
* a debugger needs to easily find how the gate DSO was being used.
*/
extern Elf_Half elf_core_extra_phdrs(void);
extern int
elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
extern int
elf_core_write_extra_data(struct coredump_params *cprm);
extern size_t elf_core_extra_data_size(void);
#else
static inline Elf_Half elf_core_extra_phdrs(void)
{
return 0;
}
static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
{
return 1;
}
static inline int elf_core_write_extra_data(struct coredump_params *cprm)
{
return 1;
}
static inline size_t elf_core_extra_data_size(void)
{
return 0;
}
#endif /* CONFIG_ARCH_BINFMT_ELF_EXTRA_PHDRS */
#endif /* _LINUX_ELFCORE_H */
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