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

// SPDX-License-Identifier: GPL-2.0
/*
 * Support for o32 Linux/MIPS ELF binaries.
 * Author: Ralf Baechle (ralf@linux-mips.org)
 *
 * 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 elfo32_check_arch

#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>

#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;
}

#undef TASK_SIZE
#define TASK_SIZE TASK_SIZE32

#undef ns_to_timeval
#define ns_to_timeval ns_to_compat_timeval

#include "../../../fs/binfmt_elf.c"
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
1da177e4 LT	3	* Support for o32 Linux/MIPS ELF binaries.
d9d54177	4	* Author: Ralf Baechle (ralf@linux-mips.org)
1da177e4 LT	5	*
	6	* Copyright (C) 1999, 2001 Ralf Baechle
	7	* Copyright (C) 1999, 2001 Silicon Graphics, Inc.
	8	*
	9	* Heavily inspired by the 32-bit Sparc compat code which is
	10	* Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
70342287	11	* Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz)
1da177e4 LT	12	*/
	13
	14	#define ELF_ARCH EM_MIPS
	15	#define ELF_CLASS ELFCLASS32
	16	#ifdef __MIPSEB__
	17	#define ELF_DATA ELFDATA2MSB;
	18	#else /* __MIPSEL__ */
	19	#define ELF_DATA ELFDATA2LSB;
	20	#endif
	21
	22	/* ELF register definitions */
	23	#define ELF_NGREG 45
	24	#define ELF_NFPREG 33
	25
	26	typedef unsigned int elf_greg_t;
	27	typedef elf_greg_t elf_gregset_t[ELF_NGREG];
	28
	29	typedef double elf_fpreg_t;
	30	typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
	31
	32	/*
	33	* This is used to ensure we don't load something for the wrong architecture.
	34	*/
c9babb19	35	#define elf_check_arch elfo32_check_arch
1da177e4	36
9843b030 SL	37	#ifdef CONFIG_KVM_GUEST
	38	#define TASK32_SIZE 0x3fff8000UL
	39	#else
1da177e4	40	#define TASK32_SIZE 0x7fff8000UL
9843b030	41	#endif
1da177e4	42	#undef ELF_ET_DYN_BASE
70342287	43	#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2)
1da177e4 LT	44
1da177e4 LT	45	#include <asm/processor.h>
cad9bc69	46
1da177e4 LT	47	#include <linux/elfcore.h>
1da177e4 LT	48	#include <linux/compat.h>
f8bd2258	49	#include <linux/math64.h>
1da177e4 LT	50
	51	#define elf_prstatus elf_prstatus32
	52	struct elf_prstatus32
	53	{
	54	struct elf_siginfo pr_info; /* Info associated with signal */
	55	short pr_cursig; /* Current signal */
	56	unsigned int pr_sigpend; /* Set of pending signals */
	57	unsigned int pr_sighold; /* Set of held signals */
	58	pid_t pr_pid;
	59	pid_t pr_ppid;
	60	pid_t pr_pgrp;
	61	pid_t pr_sid;
70342287 RB	62	struct compat_timeval pr_utime; /* User time */
70342287 RB	63	struct compat_timeval pr_stime; /* System time */
1da177e4 LT	64	struct compat_timeval pr_cutime;/* Cumulative user time */
	65	struct compat_timeval pr_cstime;/* Cumulative system time */
	66	elf_gregset_t pr_reg; /* GP registers */
	67	int pr_fpvalid; /* True if math co-processor being used. */
	68	};
	69
	70	#define elf_prpsinfo elf_prpsinfo32
	71	struct elf_prpsinfo32
	72	{
	73	char pr_state; /* numeric process state */
	74	char pr_sname; /* char for pr_state */
	75	char pr_zomb; /* zombie */
	76	char pr_nice; /* nice val */
	77	unsigned int pr_flag; /* flags */
	78	__kernel_uid_t pr_uid;
	79	__kernel_gid_t pr_gid;
	80	pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
	81	/* Lots missing */
	82	char pr_fname[16]; /* filename of executable */
70342287	83	char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
1da177e4 LT	84	};
1da177e4 LT	85
1da177e4 LT	86	#define elf_caddr_t u32
	87	#define init_elf_binfmt init_elf32_binfmt
	88
	89	#define jiffies_to_timeval jiffies_to_compat_timeval
b053c98f	90	static inline void
1da177e4 LT	91	jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
	92	{
	93	/*
603e82ed	94	* Convert jiffies to nanoseconds and separate with
1da177e4 LT	95	* one divide.
1da177e4 LT	96	*/
42a3b4f2	97	u64 nsec = (u64)jiffies * TICK_NSEC;
f8bd2258 RZ	98	u32 rem;
f8bd2258 RZ	99	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
909fa64c	100	value->tv_usec = rem / NSEC_PER_USEC;
1da177e4 LT	101	}
1da177e4 LT	102
c6237645 RB	103	#undef TASK_SIZE
	104	#define TASK_SIZE TASK_SIZE32
	105
cd19c364 FW	106	#undef ns_to_timeval
cd19c364 FW	107	#define ns_to_timeval ns_to_compat_timeval
7b741aa4	108
1da177e4	109	#include "../../../fs/binfmt_elf.c"