[deliverable/linux.git] / arch / mips / kernel / binfmt_elfn32.c

/*
 * Support for n32 Linux/MIPS ELF binaries.
 *
 * Copyright (C) 1999, 2001 Ralf Baechle
 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
 *
 * Heavily inspired by the 32-bit Sparc compat code which is
 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek   (jj@ultra.linux.cz)
 */

#define ELF_ARCH		EM_MIPS
#define ELF_CLASS		ELFCLASS32
#ifdef __MIPSEB__
#define ELF_DATA		ELFDATA2MSB;
#else /* __MIPSEL__ */
#define ELF_DATA		ELFDATA2LSB;
#endif

/* ELF register definitions */
#define ELF_NGREG	45
#define ELF_NFPREG	33

typedef unsigned long elf_greg_t;
typedef elf_greg_t elf_gregset_t[ELF_NGREG];

typedef double elf_fpreg_t;
typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(hdr)						\
({									\
	int __res = 1;							\
	struct elfhdr *__h = (hdr);					\
									\
	if (__h->e_machine != EM_MIPS)					\
		__res = 0;						\
	if (__h->e_ident[EI_CLASS] != ELFCLASS32)			\
		__res = 0;						\
	if (((__h->e_flags & EF_MIPS_ABI2) == 0) ||			\
	    ((__h->e_flags & EF_MIPS_ABI) != 0))			\
		__res = 0;						\
									\
	__res;								\
})

#define TASK32_SIZE		0x7fff8000UL
#undef ELF_ET_DYN_BASE
#define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)

#include <asm/processor.h>
#include <linux/module.h>
#include <linux/elfcore.h>
#include <linux/compat.h>

#define elf_prstatus elf_prstatus32
struct elf_prstatus32
{
	struct elf_siginfo pr_info;	/* Info associated with signal */
	short	pr_cursig;		/* Current signal */
	unsigned int pr_sigpend;	/* Set of pending signals */
	unsigned int pr_sighold;	/* Set of held signals */
	pid_t	pr_pid;
	pid_t	pr_ppid;
	pid_t	pr_pgrp;
	pid_t	pr_sid;
	struct compat_timeval pr_utime;	/* User time */
	struct compat_timeval pr_stime;	/* System time */
	struct compat_timeval pr_cutime;/* Cumulative user time */
	struct compat_timeval pr_cstime;/* Cumulative system time */
	elf_gregset_t pr_reg;	/* GP registers */
	int pr_fpvalid;		/* True if math co-processor being used.  */
};

#define elf_prpsinfo elf_prpsinfo32
struct elf_prpsinfo32
{
	char	pr_state;	/* numeric process state */
	char	pr_sname;	/* char for pr_state */
	char	pr_zomb;	/* zombie */
	char	pr_nice;	/* nice val */
	unsigned int pr_flag;	/* flags */
	__kernel_uid_t	pr_uid;
	__kernel_gid_t	pr_gid;
	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
	/* Lots missing */
	char	pr_fname[16];	/* filename of executable */
	char	pr_psargs[ELF_PRARGSZ];	/* initial part of arg list */
};

#define elf_caddr_t	u32
#define init_elf_binfmt init_elfn32_binfmt

#define jiffies_to_timeval jiffies_to_compat_timeval
static __inline__ void
jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
{
	/*
	 * Convert jiffies to nanoseconds and separate with
	 * one divide.
	 */
	u64 nsec = (u64)jiffies * TICK_NSEC;
	long rem;
	value->tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &rem);
	value->tv_usec = rem / NSEC_PER_USEC;
}

#define ELF_CORE_EFLAGS EF_MIPS_ABI2

MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries");
MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");

#undef MODULE_DESCRIPTION
#undef MODULE_AUTHOR

#undef TASK_SIZE
#define TASK_SIZE TASK_SIZE32

#include "../../../fs/binfmt_elf.c"
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Support for n32 Linux/MIPS ELF binaries.
	3	*
	4	* Copyright (C) 1999, 2001 Ralf Baechle
	5	* Copyright (C) 1999, 2001 Silicon Graphics, Inc.
	6	*
	7	* Heavily inspired by the 32-bit Sparc compat code which is
	8	* Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
	9	* Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz)
	10	*/
	11
	12	#define ELF_ARCH EM_MIPS
	13	#define ELF_CLASS ELFCLASS32
	14	#ifdef __MIPSEB__
	15	#define ELF_DATA ELFDATA2MSB;
	16	#else /* __MIPSEL__ */
	17	#define ELF_DATA ELFDATA2LSB;
	18	#endif
	19
	20	/* ELF register definitions */
	21	#define ELF_NGREG 45
	22	#define ELF_NFPREG 33
	23
	24	typedef unsigned long elf_greg_t;
	25	typedef elf_greg_t elf_gregset_t[ELF_NGREG];
	26
	27	typedef double elf_fpreg_t;
	28	typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
	29
	30	/*
	31	* This is used to ensure we don't load something for the wrong architecture.
	32	*/
	33	#define elf_check_arch(hdr) \
	34	({ \
	35	int __res = 1; \
	36	struct elfhdr *__h = (hdr); \
	37	\
	38	if (__h->e_machine != EM_MIPS) \
	39	__res = 0; \
	40	if (__h->e_ident[EI_CLASS] != ELFCLASS32) \
	41	__res = 0; \
	42	if (((__h->e_flags & EF_MIPS_ABI2) == 0) \|\| \
	43	((__h->e_flags & EF_MIPS_ABI) != 0)) \
	44	__res = 0; \
	45	\
	46	__res; \
	47	})
	48
	49	#define TASK32_SIZE 0x7fff8000UL
	50	#undef ELF_ET_DYN_BASE
	51	#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
	52
	53	#include <asm/processor.h>
	54	#include <linux/module.h>
1da177e4 LT	55	#include <linux/elfcore.h>
	56	#include <linux/compat.h>
	57
	58	#define elf_prstatus elf_prstatus32
	59	struct elf_prstatus32
	60	{
	61	struct elf_siginfo pr_info; /* Info associated with signal */
	62	short pr_cursig; /* Current signal */
	63	unsigned int pr_sigpend; /* Set of pending signals */
	64	unsigned int pr_sighold; /* Set of held signals */
	65	pid_t pr_pid;
	66	pid_t pr_ppid;
	67	pid_t pr_pgrp;
	68	pid_t pr_sid;
	69	struct compat_timeval pr_utime; /* User time */
	70	struct compat_timeval pr_stime; /* System time */
	71	struct compat_timeval pr_cutime;/* Cumulative user time */
	72	struct compat_timeval pr_cstime;/* Cumulative system time */
	73	elf_gregset_t pr_reg; /* GP registers */
	74	int pr_fpvalid; /* True if math co-processor being used. */
	75	};
	76
	77	#define elf_prpsinfo elf_prpsinfo32
	78	struct elf_prpsinfo32
	79	{
	80	char pr_state; /* numeric process state */
	81	char pr_sname; /* char for pr_state */
	82	char pr_zomb; /* zombie */
	83	char pr_nice; /* nice val */
	84	unsigned int pr_flag; /* flags */
	85	__kernel_uid_t pr_uid;
	86	__kernel_gid_t pr_gid;
	87	pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
	88	/* Lots missing */
	89	char pr_fname[16]; /* filename of executable */
	90	char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
	91	};
	92
1da177e4 LT	93	#define elf_caddr_t u32
	94	#define init_elf_binfmt init_elfn32_binfmt
	95
	96	#define jiffies_to_timeval jiffies_to_compat_timeval
	97	static __inline__ void
	98	jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
	99	{
	100	/*
603e82ed	101	* Convert jiffies to nanoseconds and separate with
1da177e4 LT	102	* one divide.
1da177e4 LT	103	*/
42a3b4f2	104	u64 nsec = (u64)jiffies * TICK_NSEC;
909fa64c AN	105	long rem;
	106	value->tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &rem);
	107	value->tv_usec = rem / NSEC_PER_USEC;
1da177e4 LT	108	}
	109
	110	#define ELF_CORE_EFLAGS EF_MIPS_ABI2
	111
	112	MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries");
	113	MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");
	114
	115	#undef MODULE_DESCRIPTION
	116	#undef MODULE_AUTHOR
	117
c6237645 RB	118	#undef TASK_SIZE
	119	#define TASK_SIZE TASK_SIZE32
	120
1da177e4	121	#include "../../../fs/binfmt_elf.c"