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-rw-r--r--arch/sh/include/asm/user.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/sh/include/asm/user.h b/arch/sh/include/asm/user.h
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1#ifndef __ASM_SH_USER_H
2#define __ASM_SH_USER_H
3
4#include <asm/ptrace.h>
5#include <asm/page.h>
6
7/*
8 * Core file format: The core file is written in such a way that gdb
9 * can understand it and provide useful information to the user (under
10 * linux we use the `trad-core' bfd). The file contents are as follows:
11 *
12 * upage: 1 page consisting of a user struct that tells gdb
13 * what is present in the file. Directly after this is a
14 * copy of the task_struct, which is currently not used by gdb,
15 * but it may come in handy at some point. All of the registers
16 * are stored as part of the upage. The upage should always be
17 * only one page long.
18 * data: The data segment follows next. We use current->end_text to
19 * current->brk to pick up all of the user variables, plus any memory
20 * that may have been sbrk'ed. No attempt is made to determine if a
21 * page is demand-zero or if a page is totally unused, we just cover
22 * the entire range. All of the addresses are rounded in such a way
23 * that an integral number of pages is written.
24 * stack: We need the stack information in order to get a meaningful
25 * backtrace. We need to write the data from usp to
26 * current->start_stack, so we round each of these in order to be able
27 * to write an integer number of pages.
28 */
29
30#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
31struct user_fpu_struct {
32 unsigned long fp_regs[32];
33 unsigned int fpscr;
34};
35#else
36struct user_fpu_struct {
37 unsigned long fp_regs[16];
38 unsigned long xfp_regs[16];
39 unsigned long fpscr;
40 unsigned long fpul;
41};
42#endif
43
44struct user {
45 struct pt_regs regs; /* entire machine state */
46 struct user_fpu_struct fpu; /* Math Co-processor registers */
47 int u_fpvalid; /* True if math co-processor being used */
48 size_t u_tsize; /* text size (pages) */
49 size_t u_dsize; /* data size (pages) */
50 size_t u_ssize; /* stack size (pages) */
51 unsigned long start_code; /* text starting address */
52 unsigned long start_data; /* data starting address */
53 unsigned long start_stack; /* stack starting address */
54 long int signal; /* signal causing core dump */
55 unsigned long u_ar0; /* help gdb find registers */
56 struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */
57 unsigned long magic; /* identifies a core file */
58 char u_comm[32]; /* user command name */
59};
60
61#define NBPG PAGE_SIZE
62#define UPAGES 1
63#define HOST_TEXT_START_ADDR (u.start_code)
64#define HOST_DATA_START_ADDR (u.start_data)
65#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
66
67#endif /* __ASM_SH_USER_H */