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 */
33 struct 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
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