1/*
  2 * Support for o32 Linux/MIPS ELF binaries.
  3 * Author: Ralf Baechle (ralf@linux-mips.org)
  4 *
  5 * Copyright (C) 1999, 2001 Ralf Baechle
  6 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
  7 *
  8 * Heavily inspired by the 32-bit Sparc compat code which is
  9 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
 10 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek	(jj@ultra.linux.cz)
 11 */
 12
 13#define ELF_ARCH		EM_MIPS
 14#define ELF_CLASS		ELFCLASS32
 15#ifdef __MIPSEB__
 16#define ELF_DATA		ELFDATA2MSB;
 17#else /* __MIPSEL__ */
 18#define ELF_DATA		ELFDATA2LSB;
 19#endif
 20
 21/* ELF register definitions */
 22#define ELF_NGREG	45
 23#define ELF_NFPREG	33
 24
 25typedef unsigned int elf_greg_t;
 26typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 27
 28typedef double elf_fpreg_t;
 29typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
 30
 31/*
 32 * This is used to ensure we don't load something for the wrong architecture.
 33 */
 34#define elf_check_arch elfo32_check_arch
 35
 36#ifdef CONFIG_KVM_GUEST
 37#define TASK32_SIZE		0x3fff8000UL
 38#else
 39#define TASK32_SIZE		0x7fff8000UL
 40#endif
 41#undef ELF_ET_DYN_BASE
 42#define ELF_ET_DYN_BASE		(TASK32_SIZE / 3 * 2)
 43
 44#include <asm/processor.h>
 45
 46#include <linux/elfcore.h>
 47#include <linux/compat.h>
 48#include <linux/math64.h>
 49
 50#define elf_prstatus elf_prstatus32
 51struct elf_prstatus32
 52{
 53	struct elf_siginfo pr_info;	/* Info associated with signal */
 54	short	pr_cursig;		/* Current signal */
 55	unsigned int pr_sigpend;	/* Set of pending signals */
 56	unsigned int pr_sighold;	/* Set of held signals */
 57	pid_t	pr_pid;
 58	pid_t	pr_ppid;
 59	pid_t	pr_pgrp;
 60	pid_t	pr_sid;
 61	struct compat_timeval pr_utime; /* User time */
 62	struct compat_timeval pr_stime; /* System time */
 63	struct compat_timeval pr_cutime;/* Cumulative user time */
 64	struct compat_timeval pr_cstime;/* Cumulative system time */
 65	elf_gregset_t pr_reg;	/* GP registers */
 66	int pr_fpvalid;		/* True if math co-processor being used.  */
 67};
 68
 69#define elf_prpsinfo elf_prpsinfo32
 70struct elf_prpsinfo32
 71{
 72	char	pr_state;	/* numeric process state */
 73	char	pr_sname;	/* char for pr_state */
 74	char	pr_zomb;	/* zombie */
 75	char	pr_nice;	/* nice val */
 76	unsigned int pr_flag;	/* flags */
 77	__kernel_uid_t	pr_uid;
 78	__kernel_gid_t	pr_gid;
 79	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
 80	/* Lots missing */
 81	char	pr_fname[16];	/* filename of executable */
 82	char	pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
 83};
 84
 85#define elf_caddr_t	u32
 86#define init_elf_binfmt init_elf32_binfmt
 87
 88#define jiffies_to_timeval jiffies_to_compat_timeval
 89static inline void
 90jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
 91{
 92	/*
 93	 * Convert jiffies to nanoseconds and separate with
 94	 * one divide.
 95	 */
 96	u64 nsec = (u64)jiffies * TICK_NSEC;
 97	u32 rem;
 98	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
 99	value->tv_usec = rem / NSEC_PER_USEC;
100}
101
102#undef TASK_SIZE
103#define TASK_SIZE TASK_SIZE32
104
105#undef cputime_to_timeval
106#define cputime_to_timeval cputime_to_compat_timeval
107static __inline__ void
108cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
109{
110	unsigned long jiffies = cputime_to_jiffies(cputime);
111
112	value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
113	value->tv_sec = jiffies / HZ;
114}
115
116#include "../../../fs/binfmt_elf.c"