[people/arne_f/kernel.git] / arch / powerpc / include / asm / user.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_USER_H
#define _ASM_POWERPC_USER_H

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

/*
 * Adapted from <asm-alpha/user.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, NOT the osf-core).  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.
 */
struct user {
	struct pt_regs	regs;			/* entire machine state */
	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 */
	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_POWERPC_USER_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
dd56fdf2	2	#ifndef _ASM_POWERPC_USER_H
dd56fdf2	3	#define _ASM_POWERPC_USER_H
1da177e4	4
dd56fdf2	5	#include <asm/ptrace.h>
1da177e4 LT	6	#include <asm/page.h>
	7
	8	/*
dd56fdf2	9	* Adapted from <asm-alpha/user.h>
dd56fdf2	10	*
1da177e4 LT	11	* Core file format: The core file is written in such a way that gdb
	12	* can understand it and provide useful information to the user (under
	13	* linux we use the `trad-core' bfd, NOT the osf-core). The file contents
	14	* are as follows:
	15	*
	16	* upage: 1 page consisting of a user struct that tells gdb
	17	* what is present in the file. Directly after this is a
	18	* copy of the task_struct, which is currently not used by gdb,
	19	* but it may come in handy at some point. All of the registers
	20	* are stored as part of the upage. The upage should always be
	21	* only one page long.
	22	* data: The data segment follows next. We use current->end_text to
	23	* current->brk to pick up all of the user variables, plus any memory
	24	* that may have been sbrk'ed. No attempt is made to determine if a
	25	* page is demand-zero or if a page is totally unused, we just cover
	26	* the entire range. All of the addresses are rounded in such a way
	27	* that an integral number of pages is written.
	28	* stack: We need the stack information in order to get a meaningful
	29	* backtrace. We need to write the data from usp to
	30	* current->start_stack, so we round each of these in order to be able
	31	* to write an integer number of pages.
	32	*/
	33	struct user {
	34	struct pt_regs regs; /* entire machine state */
	35	size_t u_tsize; /* text size (pages) */
	36	size_t u_dsize; /* data size (pages) */
	37	size_t u_ssize; /* stack size (pages) */
	38	unsigned long start_code; /* text starting address */
	39	unsigned long start_data; /* data starting address */
	40	unsigned long start_stack; /* stack starting address */
	41	long int signal; /* signal causing core dump */
6e16d89b	42	unsigned long u_ar0; /* help gdb find registers */
1da177e4 LT	43	unsigned long magic; /* identifies a core file */
	44	char u_comm[32]; /* user command name */
	45	};
	46
	47	#define NBPG PAGE_SIZE
	48	#define UPAGES 1
	49	#define HOST_TEXT_START_ADDR (u.start_code)
	50	#define HOST_DATA_START_ADDR (u.start_data)
	51	#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
dd56fdf2	52	#endif /* _ASM_POWERPC_USER_H */