[deliverable/linux.git] / arch / mips / kernel / binfmt_elfo32.c

/*
 * Support for o32 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 int 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)				\
		__res = 0;						\
	if (((__h->e_flags & EF_MIPS_ABI) != 0) &&			\
	    ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))		\
		__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>

/*
 * When this file is selected, we are definitely running a 64bit kernel.
 * So using the right regs define in asm/reg.h
 */
#define WANT_COMPAT_REG_H

/* These MUST be defined before elf.h gets included */
extern void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs);
#define ELF_CORE_COPY_REGS(_dest, _regs) elf32_core_copy_regs(_dest, _regs);
#define ELF_CORE_COPY_TASK_REGS(_tsk, _dest)				\
({									\
	int __res = 1;							\
	elf32_core_copy_regs(*(_dest), task_pt_regs(_tsk));		\
	__res;								\
})

#include <linux/module.h>
#include <linux/elfcore.h>
#include <linux/compat.h>
#include <linux/math64.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_elf32_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;
	u32 rem;
	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
	value->tv_usec = rem / NSEC_PER_USEC;
}

void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs)
{
	int i;

	for (i = 0; i < EF_R0; i++)
		grp[i] = 0;
	grp[EF_R0] = 0;
	for (i = 1; i <= 31; i++)
		grp[EF_R0 + i] = (elf_greg_t) regs->regs[i];
	grp[EF_R26] = 0;
	grp[EF_R27] = 0;
	grp[EF_LO] = (elf_greg_t) regs->lo;
	grp[EF_HI] = (elf_greg_t) regs->hi;
	grp[EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;
	grp[EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;
	grp[EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;
	grp[EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;
#ifdef EF_UNUSED0
	grp[EF_UNUSED0] = 0;
#endif
}

MODULE_DESCRIPTION("Binary format loader for compatibility with o32 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 o32 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 int 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	__res = 0; \
	44	if (((__h->e_flags & EF_MIPS_ABI) != 0) && \
	45	((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \
	46	__res = 0; \
	47	\
	48	__res; \
	49	})
	50
	51	#define TASK32_SIZE 0x7fff8000UL
	52	#undef ELF_ET_DYN_BASE
	53	#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
	54
	55	#include <asm/processor.h>
cad9bc69 YZ	56
	57	/*
	58	* When this file is selected, we are definitely running a 64bit kernel.
	59	* So using the right regs define in asm/reg.h
	60	*/
	61	#define WANT_COMPAT_REG_H
	62
	63	/* These MUST be defined before elf.h gets included */
	64	extern void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs);
	65	#define ELF_CORE_COPY_REGS(_dest, _regs) elf32_core_copy_regs(_dest, _regs);
	66	#define ELF_CORE_COPY_TASK_REGS(_tsk, _dest) \
	67	({ \
	68	int __res = 1; \
	69	elf32_core_copy_regs(*(_dest), task_pt_regs(_tsk)); \
	70	__res; \
	71	})
	72
1da177e4	73	#include <linux/module.h>
1da177e4 LT	74	#include <linux/elfcore.h>
1da177e4 LT	75	#include <linux/compat.h>
f8bd2258	76	#include <linux/math64.h>
1da177e4 LT	77
	78	#define elf_prstatus elf_prstatus32
	79	struct elf_prstatus32
	80	{
	81	struct elf_siginfo pr_info; /* Info associated with signal */
	82	short pr_cursig; /* Current signal */
	83	unsigned int pr_sigpend; /* Set of pending signals */
	84	unsigned int pr_sighold; /* Set of held signals */
	85	pid_t pr_pid;
	86	pid_t pr_ppid;
	87	pid_t pr_pgrp;
	88	pid_t pr_sid;
	89	struct compat_timeval pr_utime; /* User time */
	90	struct compat_timeval pr_stime; /* System time */
	91	struct compat_timeval pr_cutime;/* Cumulative user time */
	92	struct compat_timeval pr_cstime;/* Cumulative system time */
	93	elf_gregset_t pr_reg; /* GP registers */
	94	int pr_fpvalid; /* True if math co-processor being used. */
	95	};
	96
	97	#define elf_prpsinfo elf_prpsinfo32
	98	struct elf_prpsinfo32
	99	{
	100	char pr_state; /* numeric process state */
	101	char pr_sname; /* char for pr_state */
	102	char pr_zomb; /* zombie */
	103	char pr_nice; /* nice val */
	104	unsigned int pr_flag; /* flags */
	105	__kernel_uid_t pr_uid;
	106	__kernel_gid_t pr_gid;
	107	pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
	108	/* Lots missing */
	109	char pr_fname[16]; /* filename of executable */
	110	char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
	111	};
	112
1da177e4 LT	113	#define elf_caddr_t u32
	114	#define init_elf_binfmt init_elf32_binfmt
	115
	116	#define jiffies_to_timeval jiffies_to_compat_timeval
b053c98f	117	static inline void
1da177e4 LT	118	jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
	119	{
	120	/*
603e82ed	121	* Convert jiffies to nanoseconds and separate with
1da177e4 LT	122	* one divide.
1da177e4 LT	123	*/
42a3b4f2	124	u64 nsec = (u64)jiffies * TICK_NSEC;
f8bd2258 RZ	125	u32 rem;
f8bd2258 RZ	126	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
909fa64c	127	value->tv_usec = rem / NSEC_PER_USEC;
1da177e4 LT	128	}
1da177e4 LT	129
b053c98f	130	void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs)
1da177e4 LT	131	{
	132	int i;
	133
b053c98f RB	134	for (i = 0; i < EF_R0; i++)
	135	grp[i] = 0;
	136	grp[EF_R0] = 0;
	137	for (i = 1; i <= 31; i++)
	138	grp[EF_R0 + i] = (elf_greg_t) regs->regs[i];
	139	grp[EF_R26] = 0;
	140	grp[EF_R27] = 0;
	141	grp[EF_LO] = (elf_greg_t) regs->lo;
	142	grp[EF_HI] = (elf_greg_t) regs->hi;
	143	grp[EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;
	144	grp[EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;
	145	grp[EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;
	146	grp[EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;
	147	#ifdef EF_UNUSED0
	148	grp[EF_UNUSED0] = 0;
	149	#endif
1da177e4 LT	150	}
	151
	152	MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries");
	153	MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");
	154
	155	#undef MODULE_DESCRIPTION
	156	#undef MODULE_AUTHOR
	157
c6237645 RB	158	#undef TASK_SIZE
	159	#define TASK_SIZE TASK_SIZE32
	160
1da177e4	161	#include "../../../fs/binfmt_elf.c"