File: /usr/src/linux/include/asm-cris/user.h

1     #ifndef __ASM_CRIS_USER_H
2     #define __ASM_CRIS_USER_H
3     
4     #include <linux/types.h>
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 {
32     	struct pt_regs	regs;			/* entire machine state */
33     	size_t		u_tsize;		/* text size (pages) */
34     	size_t		u_dsize;		/* data size (pages) */
35     	size_t		u_ssize;		/* stack size (pages) */
36     	unsigned long	start_code;		/* text starting address */
37     	unsigned long	start_data;		/* data starting address */
38     	unsigned long	start_stack;		/* stack starting address */
39     	long int	signal;			/* signal causing core dump */
40     	struct regs *	u_ar0;			/* help gdb find registers */
41     	unsigned long	magic;			/* identifies a core file */
42     	char		u_comm[32];		/* user command name */
43     };
44     
45     #define NBPG			PAGE_SIZE
46     #define UPAGES			1
47     #define HOST_TEXT_START_ADDR	(u.start_code)
48     #define HOST_DATA_START_ADDR	(u.start_data)
49     #define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)
50     
51     #endif /* __ASM_CRIS_USER_H */
52