[linux-2.6-block.git] / include / asm-sh / user.h

#ifndef __ASM_SH_USER_H
#define __ASM_SH_USER_H

#include <asm/ptrace.h>
#include <asm/page.h>

/*
 * Core file format: The core file is written in such a way that gdb
 * can understand it and provide useful information to the user (under
 * linux we use the `trad-core' bfd).  The file contents are as follows:
 *
 *  upage: 1 page consisting of a user struct that tells gdb
 *	what is present in the file.  Directly after this is a
 *	copy of the task_struct, which is currently not used by gdb,
 *	but it may come in handy at some point.  All of the registers
 *	are stored as part of the upage.  The upage should always be
 *	only one page long.
 *  data: The data segment follows next.  We use current->end_text to
 *	current->brk to pick up all of the user variables, plus any memory
 *	that may have been sbrk'ed.  No attempt is made to determine if a
 *	page is demand-zero or if a page is totally unused, we just cover
 *	the entire range.  All of the addresses are rounded in such a way
 *	that an integral number of pages is written.
 *  stack: We need the stack information in order to get a meaningful
 *	backtrace.  We need to write the data from usp to
 *	current->start_stack, so we round each of these in order to be able
 *	to write an integer number of pages.
 */

#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
struct user_fpu_struct {
	unsigned long fp_regs[32];
	unsigned int fpscr;
};
#else
struct user_fpu_struct {
	unsigned long fp_regs[16];
	unsigned long xfp_regs[16];
	unsigned long fpscr;
	unsigned long fpul;
};
#endif

struct user {
	struct pt_regs	regs;			/* entire machine state */
	struct user_fpu_struct fpu;	/* Math Co-processor registers  */
	int u_fpvalid;		/* True if math co-processor being used */
	size_t		u_tsize;		/* text size (pages) */
	size_t		u_dsize;		/* data size (pages) */
	size_t		u_ssize;		/* stack size (pages) */
	unsigned long	start_code;		/* text starting address */
	unsigned long	start_data;		/* data starting address */
	unsigned long	start_stack;		/* stack starting address */
	long int	signal;			/* signal causing core dump */
	unsigned long	u_ar0;			/* help gdb find registers */
	struct user_fpu_struct* u_fpstate;	/* Math Co-processor pointer */
	unsigned long	magic;			/* identifies a core file */
	char		u_comm[32];		/* user command name */
};

#define NBPG			PAGE_SIZE
#define UPAGES			1
#define HOST_TEXT_START_ADDR	(u.start_code)
#define HOST_DATA_START_ADDR	(u.start_data)
#define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)

#endif /* __ASM_SH_USER_H */
Commit	Line	Data
1da177e4 LT	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
17bfa639	30	#if defined(__SH5__) \|\| defined(CONFIG_CPU_SH5)
fb8e569c	31	struct user_fpu_struct {
17bfa639 PM	32	unsigned long fp_regs[32];
	33	unsigned int fpscr;
	34	};
	35	#else
1da177e4 LT	36	struct user_fpu_struct {
	37	unsigned long fp_regs[16];
	38	unsigned long xfp_regs[16];
	39	unsigned long fpscr;
	40	unsigned long fpul;
	41	};
17bfa639	42	#endif
1da177e4 LT	43
	44	struct 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 */
6e16d89b	55	unsigned long u_ar0; /* help gdb find registers */
1da177e4 LT	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 */