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 struct user_fpu_struct {
32 	unsigned long fp_regs[16];
33 	unsigned long xfp_regs[16];
34 	unsigned long fpscr;
35 	unsigned long fpul;
36 };
37 
38 struct user {
39 	struct pt_regs	regs;			/* entire machine state */
40 	struct user_fpu_struct fpu;	/* Math Co-processor registers  */
41 	int u_fpvalid;		/* True if math co-processor being used */
42 	size_t		u_tsize;		/* text size (pages) */
43 	size_t		u_dsize;		/* data size (pages) */
44 	size_t		u_ssize;		/* stack size (pages) */
45 	unsigned long	start_code;		/* text starting address */
46 	unsigned long	start_data;		/* data starting address */
47 	unsigned long	start_stack;		/* stack starting address */
48 	long int	signal;			/* signal causing core dump */
49 	unsigned long	u_ar0;			/* help gdb find registers */
50 	struct user_fpu_struct* u_fpstate;	/* Math Co-processor pointer */
51 	unsigned long	magic;			/* identifies a core file */
52 	char		u_comm[32];		/* user command name */
53 };
54 
55 #define NBPG			PAGE_SIZE
56 #define UPAGES			1
57 #define HOST_TEXT_START_ADDR	(u.start_code)
58 #define HOST_DATA_START_ADDR	(u.start_data)
59 #define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)
60 
61 #endif /* __ASM_SH_USER_H */
62