[GitHub/mt8127/android_kernel_alcatel_ttab.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;								\
})

#ifdef CONFIG_KVM_GUEST
#define TASK32_SIZE		0x3fff8000UL
#else
#define TASK32_SIZE		0x7fff8000UL
#endif
#undef ELF_ET_DYN_BASE
#define ELF_ET_DYN_BASE		(TASK32_SIZE / 3 * 2)

#include <asm/processor.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 < MIPS32_EF_R0; i++)
		grp[i] = 0;
	grp[MIPS32_EF_R0] = 0;
	for (i = 1; i <= 31; i++)
		grp[MIPS32_EF_R0 + i] = (elf_greg_t) regs->regs[i];
	grp[MIPS32_EF_R26] = 0;
	grp[MIPS32_EF_R27] = 0;
	grp[MIPS32_EF_LO] = (elf_greg_t) regs->lo;
	grp[MIPS32_EF_HI] = (elf_greg_t) regs->hi;
	grp[MIPS32_EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;
	grp[MIPS32_EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;
	grp[MIPS32_EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;
	grp[MIPS32_EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;
#ifdef MIPS32_EF_UNUSED0
	grp[MIPS32_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

#undef cputime_to_timeval
#define cputime_to_timeval cputime_to_compat_timeval
static __inline__ void
cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
{
	unsigned long jiffies = cputime_to_jiffies(cputime);

	value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
	value->tv_sec = jiffies / HZ;
}

#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)
70342287	9	* Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz)
1da177e4 LT	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
9843b030 SL	51	#ifdef CONFIG_KVM_GUEST
	52	#define TASK32_SIZE 0x3fff8000UL
	53	#else
1da177e4	54	#define TASK32_SIZE 0x7fff8000UL
9843b030	55	#endif
1da177e4	56	#undef ELF_ET_DYN_BASE
70342287	57	#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
1da177e4 LT	58
1da177e4 LT	59	#include <asm/processor.h>
cad9bc69	60
cad9bc69 YZ	61	/* These MUST be defined before elf.h gets included */
	62	extern void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs);
	63	#define ELF_CORE_COPY_REGS(_dest, _regs) elf32_core_copy_regs(_dest, _regs);
	64	#define ELF_CORE_COPY_TASK_REGS(_tsk, _dest) \
	65	({ \
	66	int __res = 1; \
	67	elf32_core_copy_regs(*(_dest), task_pt_regs(_tsk)); \
	68	__res; \
	69	})
	70
1da177e4	71	#include <linux/module.h>
1da177e4 LT	72	#include <linux/elfcore.h>
1da177e4 LT	73	#include <linux/compat.h>
f8bd2258	74	#include <linux/math64.h>
1da177e4 LT	75
	76	#define elf_prstatus elf_prstatus32
	77	struct elf_prstatus32
	78	{
	79	struct elf_siginfo pr_info; /* Info associated with signal */
	80	short pr_cursig; /* Current signal */
	81	unsigned int pr_sigpend; /* Set of pending signals */
	82	unsigned int pr_sighold; /* Set of held signals */
	83	pid_t pr_pid;
	84	pid_t pr_ppid;
	85	pid_t pr_pgrp;
	86	pid_t pr_sid;
70342287 RB	87	struct compat_timeval pr_utime; /* User time */
70342287 RB	88	struct compat_timeval pr_stime; /* System time */
1da177e4 LT	89	struct compat_timeval pr_cutime;/* Cumulative user time */
	90	struct compat_timeval pr_cstime;/* Cumulative system time */
	91	elf_gregset_t pr_reg; /* GP registers */
	92	int pr_fpvalid; /* True if math co-processor being used. */
	93	};
	94
	95	#define elf_prpsinfo elf_prpsinfo32
	96	struct elf_prpsinfo32
	97	{
	98	char pr_state; /* numeric process state */
	99	char pr_sname; /* char for pr_state */
	100	char pr_zomb; /* zombie */
	101	char pr_nice; /* nice val */
	102	unsigned int pr_flag; /* flags */
	103	__kernel_uid_t pr_uid;
	104	__kernel_gid_t pr_gid;
	105	pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
	106	/* Lots missing */
	107	char pr_fname[16]; /* filename of executable */
70342287	108	char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
1da177e4 LT	109	};
1da177e4 LT	110
1da177e4 LT	111	#define elf_caddr_t u32
	112	#define init_elf_binfmt init_elf32_binfmt
	113
	114	#define jiffies_to_timeval jiffies_to_compat_timeval
b053c98f	115	static inline void
1da177e4 LT	116	jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
	117	{
	118	/*
603e82ed	119	* Convert jiffies to nanoseconds and separate with
1da177e4 LT	120	* one divide.
1da177e4 LT	121	*/
42a3b4f2	122	u64 nsec = (u64)jiffies * TICK_NSEC;
f8bd2258 RZ	123	u32 rem;
f8bd2258 RZ	124	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
909fa64c	125	value->tv_usec = rem / NSEC_PER_USEC;
1da177e4 LT	126	}
1da177e4 LT	127
b053c98f	128	void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs)
1da177e4 LT	129	{
	130	int i;
	131
887c1489	132	for (i = 0; i < MIPS32_EF_R0; i++)
b053c98f	133	grp[i] = 0;
887c1489	134	grp[MIPS32_EF_R0] = 0;
b053c98f	135	for (i = 1; i <= 31; i++)
887c1489 AS	136	grp[MIPS32_EF_R0 + i] = (elf_greg_t) regs->regs[i];
	137	grp[MIPS32_EF_R26] = 0;
	138	grp[MIPS32_EF_R27] = 0;
	139	grp[MIPS32_EF_LO] = (elf_greg_t) regs->lo;
	140	grp[MIPS32_EF_HI] = (elf_greg_t) regs->hi;
	141	grp[MIPS32_EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;
	142	grp[MIPS32_EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;
	143	grp[MIPS32_EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;
	144	grp[MIPS32_EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;
	145	#ifdef MIPS32_EF_UNUSED0
	146	grp[MIPS32_EF_UNUSED0] = 0;
b053c98f	147	#endif
1da177e4 LT	148	}
	149
	150	MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries");
	151	MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");
	152
	153	#undef MODULE_DESCRIPTION
	154	#undef MODULE_AUTHOR
	155
c6237645 RB	156	#undef TASK_SIZE
	157	#define TASK_SIZE TASK_SIZE32
	158
7b741aa4 RB	159	#undef cputime_to_timeval
	160	#define cputime_to_timeval cputime_to_compat_timeval
	161	static __inline__ void
	162	cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
	163	{
	164	unsigned long jiffies = cputime_to_jiffies(cputime);
	165
	166	value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
	167	value->tv_sec = jiffies / HZ;
	168	}
	169
1da177e4	170	#include "../../../fs/binfmt_elf.c"