1 files changed, 119 insertions, 0 deletions

diff --git a/arch/mips/kernel/binfmt_elfn32.c b/arch/mips/kernel/binfmt_elfn32.c
new file mode 100644
index 000000000000..ed47041f3030
--- /dev/null
+++ b/arch/mips/kernel/binfmt_elfn32.c
@@ -0,0 +1,119 @@
+/*
+ * Support for n32 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 long 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) ||                     \
+            ((__h->e_flags & EF_MIPS_ABI) != 0))                        \
+                __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>
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/elfcore.h>
+#include <linux/compat.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_addr_t      u32
+#define elf_caddr_t     u32
+#define init_elf_binfmt init_elfn32_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 seperate with
+         * one divide.
+         */
+        u64 nsec = (u64)jiffies * TICK_NSEC; 
+        value->tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &value->tv_usec);
+        value->tv_usec /= NSEC_PER_USEC;
+}
+
+#define ELF_CORE_EFLAGS EF_MIPS_ABI2
+
+MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries");
+MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");
+
+#undef MODULE_DESCRIPTION
+#undef MODULE_AUTHOR
+
+#include "../../../fs/binfmt_elf.c"