1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_USER_H
3 #define __ASM_SH_USER_H
4
5 #include <asm/ptrace.h>
6 #include <asm/page.h>
7
8 /*
9 * Core file format: The core file is written in such a way that gdb
10 * can understand it and provide useful information to the user (under
11 * linux we use the `trad-core' bfd). The file contents are as follows:
12 *
13 * upage: 1 page consisting of a user struct that tells gdb
14 * what is present in the file. Directly after this is a
15 * copy of the task_struct, which is currently not used by gdb,
16 * but it may come in handy at some point. All of the registers
17 * are stored as part of the upage. The upage should always be
18 * only one page long.
19 * data: The data segment follows next. We use current->end_text to
20 * current->brk to pick up all of the user variables, plus any memory
21 * that may have been sbrk'ed. No attempt is made to determine if a
22 * page is demand-zero or if a page is totally unused, we just cover
23 * the entire range. All of the addresses are rounded in such a way
24 * that an integral number of pages is written.
25 * stack: We need the stack information in order to get a meaningful
26 * backtrace. We need to write the data from usp to
27 * current->start_stack, so we round each of these in order to be able
28 * to write an integer number of pages.
29 */
30
31 #if defined(__SH5__) || defined(CONFIG_CPU_SH5)
32 struct user_fpu_struct {
33 unsigned long fp_regs[32];
34 unsigned int fpscr;
35 };
36 #else
37 struct user_fpu_struct {
38 unsigned long fp_regs[16];
39 unsigned long xfp_regs[16];
40 unsigned long fpscr;
41 unsigned long fpul;
42 };
43 #endif
44
45 struct user {
46 struct pt_regs regs; /* entire machine state */
47 struct user_fpu_struct fpu; /* Math Co-processor registers */
48 int u_fpvalid; /* True if math co-processor being used */
49 size_t u_tsize; /* text size (pages) */
50 size_t u_dsize; /* data size (pages) */
51 size_t u_ssize; /* stack size (pages) */
52 unsigned long start_code; /* text starting address */
53 unsigned long start_data; /* data starting address */
54 unsigned long start_stack; /* stack starting address */
55 long int signal; /* signal causing core dump */
56 unsigned long u_ar0; /* help gdb find registers */
57 struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */
58 unsigned long magic; /* identifies a core file */
59 char u_comm[32]; /* user command name */
60 };
61
62 #define NBPG PAGE_SIZE
63 #define UPAGES 1
64 #define HOST_TEXT_START_ADDR (u.start_code)
65 #define HOST_DATA_START_ADDR (u.start_data)
66 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
67
68 #endif /* __ASM_SH_USER_H */