1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_USER_H
3#define _ASM_POWERPC_USER_H
4
5#include <asm/ptrace.h>
6#include <asm/page.h>
7
8/*
9 * Adapted from <asm-alpha/user.h>
10 *
11 * Core file format: The core file is written in such a way that gdb
12 * can understand it and provide useful information to the user (under
13 * linux we use the `trad-core' bfd, NOT the osf-core).  The file contents
14 * are as follows:
15 *
16 *  upage: 1 page consisting of a user struct that tells gdb
17 *	what is present in the file.  Directly after this is a
18 *	copy of the task_struct, which is currently not used by gdb,
19 *	but it may come in handy at some point.  All of the registers
20 *	are stored as part of the upage.  The upage should always be
21 *	only one page long.
22 *  data: The data segment follows next.  We use current->end_text to
23 *	current->brk to pick up all of the user variables, plus any memory
24 *	that may have been sbrk'ed.  No attempt is made to determine if a
25 *	page is demand-zero or if a page is totally unused, we just cover
26 *	the entire range.  All of the addresses are rounded in such a way
27 *	that an integral number of pages is written.
28 *  stack: We need the stack information in order to get a meaningful
29 *	backtrace.  We need to write the data from usp to
30 *	current->start_stack, so we round each of these in order to be able
31 *	to write an integer number of pages.
32 */
33struct user {
34	struct user_pt_regs regs;		/* entire machine state */
35	size_t		u_tsize;		/* text size (pages) */
36	size_t		u_dsize;		/* data size (pages) */
37	size_t		u_ssize;		/* stack size (pages) */
38	unsigned long	start_code;		/* text starting address */
39	unsigned long	start_data;		/* data starting address */
40	unsigned long	start_stack;		/* stack starting address */
41	long int	signal;			/* signal causing core dump */
42	unsigned long	u_ar0;			/* help gdb find registers */
43	unsigned long	magic;			/* identifies a core file */
44	char		u_comm[32];		/* user command name */
45};
46
47#endif	/* _ASM_POWERPC_USER_H */
48