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binfmt_elfo32.c
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binfmt_elfo32.c
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// 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 old_timeval32 pr_utime; /* User time */
struct old_timeval32 pr_stime; /* System time */
struct old_timeval32 pr_cutime;/* Cumulative user time */
struct old_timeval32 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_old_timeval32
static inline void
jiffies_to_old_timeval32(unsigned long jiffies, struct old_timeval32 *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_kernel_old_timeval
#define ns_to_kernel_old_timeval ns_to_old_timeval32
/*
* Some data types as stored in coredump.
*/
#define user_long_t compat_long_t
#define user_siginfo_t compat_siginfo_t
#define copy_siginfo_to_external copy_siginfo_to_external32
#include "../../../fs/binfmt_elf.c"