mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-05 22:20:24 -08:00
c47716f95b
* exec/config.h.in (__bool_true_false_are_defined): * exec/configure.ac (REENTRANT): New definition. (READLINKAT_SYSCALL, READLINK_SYSCALL): New defines. Set on all hosts. * exec/exec.c (MIN, MAX): Remove redundant declarations. Move to config.h. (exec_0): Copy name of executable into NAME when !REENTRANT. * exec/exec.h (struct exec_tracee): New struct `exec_file'. * exec/trace.c (remove_tracee, handle_exec, handle_readlinkat) (process_system_call, after_fork): Handle readlinkat system calls.
197 lines
3.9 KiB
C
197 lines
3.9 KiB
C
/* Program execution for Emacs.
|
||
|
||
Copyright (C) 2023 Free Software Foundation, Inc.
|
||
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or (at
|
||
your option) any later version.
|
||
|
||
GNU Emacs is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
|
||
|
||
|
||
|
||
#ifndef _EXEC_H_
|
||
#define _EXEC_H_
|
||
|
||
#ifdef HAVE_STDINT_H
|
||
#include <stdint.h>
|
||
#endif /* HAVE_STDINT_H */
|
||
|
||
#include <sys/types.h>
|
||
|
||
#include USER_HEADER
|
||
|
||
/* Define a replacement for `uint64_t' if it's not present in the C
|
||
library. */
|
||
|
||
#ifndef UINT64_MAX
|
||
|
||
typedef struct
|
||
{
|
||
uint32_t word1;
|
||
uint32_t word2;
|
||
} xint64_t;
|
||
|
||
#else /* UINT64_MAX */
|
||
typedef uint64_t xint64_t;
|
||
#endif /* !UINT64_MAX */
|
||
|
||
|
||
|
||
/* 32-bit ELF headers. */
|
||
|
||
struct elf_header_32
|
||
{
|
||
unsigned char e_ident[16];
|
||
uint16_t e_type;
|
||
uint16_t e_machine;
|
||
uint32_t e_version;
|
||
uint32_t e_entry;
|
||
uint32_t e_phoff;
|
||
uint32_t e_shoff;
|
||
uint32_t e_flags;
|
||
uint16_t e_ehsize;
|
||
uint16_t e_phentsize;
|
||
uint16_t e_phnum;
|
||
uint16_t e_shentsize;
|
||
uint16_t e_shnum;
|
||
uint16_t e_shstrndx;
|
||
};
|
||
|
||
struct program_header_32
|
||
{
|
||
uint32_t p_type;
|
||
uint32_t p_offset;
|
||
uint32_t p_vaddr;
|
||
uint32_t p_paddr;
|
||
uint32_t p_filesz;
|
||
uint32_t p_memsz;
|
||
uint32_t p_flags;
|
||
uint32_t p_align;
|
||
};
|
||
|
||
struct dt_entry_32
|
||
{
|
||
uint32_t d_tag;
|
||
uint32_t d_val;
|
||
};
|
||
|
||
|
||
|
||
struct elf_header_64
|
||
{
|
||
unsigned char e_ident[16];
|
||
uint16_t e_type;
|
||
uint16_t e_machine;
|
||
uint32_t e_version;
|
||
xint64_t e_entry;
|
||
xint64_t e_phoff;
|
||
xint64_t e_shoff;
|
||
uint32_t e_flags;
|
||
uint16_t e_ehsize;
|
||
uint16_t e_phentsize;
|
||
uint16_t e_phnum;
|
||
uint16_t e_shentsize;
|
||
uint16_t e_shnum;
|
||
uint16_t e_shstrndx;
|
||
};
|
||
|
||
struct program_header_64
|
||
{
|
||
uint32_t p_type;
|
||
uint32_t p_flags;
|
||
xint64_t p_offset;
|
||
xint64_t p_vaddr;
|
||
xint64_t p_paddr;
|
||
xint64_t p_filesz;
|
||
xint64_t p_memsz;
|
||
xint64_t p_align;
|
||
};
|
||
|
||
struct dt_entry_64
|
||
{
|
||
xint64_t d_tag;
|
||
xint64_t d_val;
|
||
};
|
||
|
||
|
||
|
||
/* Define some types to the correct values. */
|
||
|
||
#ifdef EXEC_64
|
||
typedef struct elf_header_64 elf_header;
|
||
typedef struct program_header_64 program_header;
|
||
typedef struct dt_entry_64 dt_entry;
|
||
#else /* !EXEC_64 */
|
||
typedef struct elf_header_32 elf_header;
|
||
typedef struct program_header_32 program_header;
|
||
typedef struct dt_entry_32 dt_entry;
|
||
#endif /* EXEC_64 */
|
||
|
||
|
||
|
||
/* Defined in trace.c. */
|
||
|
||
/* Structure describing a process being traced. */
|
||
|
||
struct exec_tracee
|
||
{
|
||
/* The next process being traced. */
|
||
struct exec_tracee *next;
|
||
|
||
/* The thread ID of this process. */
|
||
pid_t pid;
|
||
|
||
/* Whether or not the tracee is currently waiting for a system call
|
||
to complete. */
|
||
bool waiting_for_syscall;
|
||
|
||
#ifndef REENTRANT
|
||
/* Name of the executable being run. */
|
||
char *exec_file;
|
||
#endif /* !REENTRANT */
|
||
};
|
||
|
||
|
||
|
||
#ifdef __aarch64__
|
||
|
||
extern int aarch64_get_regs (pid_t, USER_REGS_STRUCT *);
|
||
extern int aarch64_set_regs (pid_t, USER_REGS_STRUCT *, bool);
|
||
|
||
#endif /* __aarch64__ */
|
||
|
||
|
||
|
||
extern USER_WORD user_alloca (struct exec_tracee *, USER_REGS_STRUCT *,
|
||
USER_REGS_STRUCT *, USER_WORD);
|
||
extern int user_copy (struct exec_tracee *, const unsigned char *,
|
||
USER_WORD, USER_WORD);
|
||
extern void exec_init (const char *);
|
||
|
||
|
||
|
||
extern int tracing_execve (const char *, char *const *,
|
||
char *const *);
|
||
extern int after_fork (pid_t);
|
||
extern pid_t exec_waitpid (pid_t, int *, int);
|
||
|
||
|
||
|
||
/* Defined in exec.c. */
|
||
|
||
extern char *exec_0 (char *, struct exec_tracee *,
|
||
size_t *, USER_REGS_STRUCT *);
|
||
|
||
|
||
|
||
#endif /* _EXEC_H_ */
|