1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ALPHA_USER_H
3 #define _ALPHA_USER_H
4
5 #include <linux/sched.h>
6 #include <linux/ptrace.h>
7
8 #include <asm/page.h>
9 #include <asm/reg.h>
10
11 /*
12 * Core file format: The core file is written in such a way that gdb
13 * can understand it and provide useful information to the user (under
14 * linux we use the `trad-core' bfd, NOT the osf-core). The file contents
15 * are as follows:
16 *
17 * upage: 1 page consisting of a user struct that tells gdb
18 * what is present in the file. Directly after this is a
19 * copy of the task_struct, which is currently not used by gdb,
20 * but it may come in handy at some point. All of the registers
21 * are stored as part of the upage. The upage should always be
22 * only one page long.
23 * data: The data segment follows next. We use current->end_text to
24 * current->brk to pick up all of the user variables, plus any memory
25 * that may have been sbrk'ed. No attempt is made to determine if a
26 * page is demand-zero or if a page is totally unused, we just cover
27 * the entire range. All of the addresses are rounded in such a way
28 * that an integral number of pages is written.
29 * stack: We need the stack information in order to get a meaningful
30 * backtrace. We need to write the data from usp to
31 * current->start_stack, so we round each of these in order to be able
32 * to write an integer number of pages.
33 */
34 struct user {
35 unsigned long regs[EF_SIZE/8+32]; /* integer and fp regs */
36 size_t u_tsize; /* text size (pages) */
37 size_t u_dsize; /* data size (pages) */
38 size_t u_ssize; /* stack size (pages) */
39 unsigned long start_code; /* text starting address */
40 unsigned long start_data; /* data starting address */
41 unsigned long start_stack; /* stack starting address */
42 long int signal; /* signal causing core dump */
43 unsigned long u_ar0; /* help gdb find registers */
44 unsigned long magic; /* identifies a core file */
45 char u_comm[32]; /* user command name */
46 };
47
48 #define NBPG PAGE_SIZE
49 #define UPAGES 1
50 #define HOST_TEXT_START_ADDR (u.start_code)
51 #define HOST_DATA_START_ADDR (u.start_data)
52 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
53
54 #endif /* _ALPHA_USER_H */