arch/sparc64/kernel/binfmt_elf32.c

   1 /*
   2  * binfmt_elf32.c: Support 32-bit Sparc ELF binaries on Ultra.
   3  *
   4  * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
   5  * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek   (jj@ultra.linux.cz)
   6  */
   7
   8 #define ELF_ARCH                EM_SPARC
   9 #define ELF_CLASS               ELFCLASS32
  10 #define ELF_DATA                ELFDATA2MSB;
  11
  12 /* For the most part we present code dumps in the format
  13  * Solaris does.
  14  */
  15 typedef unsigned int elf_greg_t;
  16 #define ELF_NGREG 38
  17 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  18
  19 /* Format is:
  20  *      G0 --> G7
  21  *      O0 --> O7
  22  *      L0 --> L7
  23  *      I0 --> I7
  24  *      PSR, PC, nPC, Y, WIM, TBR
  25  */
  26 #include <asm/psrcompat.h>
  27 #define ELF_CORE_COPY_REGS(__elf_regs, __pt_regs)       \
  28 do {    unsigned int *dest = &(__elf_regs[0]);          \
  29         struct pt_regs *src = (__pt_regs);              \
  30         unsigned int __user *sp;                        \
  31         int i;                                          \
  32         for(i = 0; i < 16; i++)                         \
  33                 dest[i] = (unsigned int) src->u_regs[i];\
  34         /* Don't try this at home kids... */            \
  35         sp = (unsigned int __user *) (src->u_regs[14] & \
  36                 0x00000000fffffffc);                    \
  37         for(i = 0; i < 16; i++)                         \
  38                 __get_user(dest[i+16], &sp[i]);         \
  39         dest[32] = tstate_to_psr(src->tstate);          \
  40         dest[33] = (unsigned int) src->tpc;             \
  41         dest[34] = (unsigned int) src->tnpc;            \
  42         dest[35] = src->y;                              \
  43         dest[36] = dest[37] = 0; /* XXX */              \
  44 } while(0);
  45
  46 typedef struct {
  47         union {
  48                 unsigned int    pr_regs[32];
  49                 unsigned long   pr_dregs[16];
  50         } pr_fr;
  51         unsigned int __unused;
  52         unsigned int    pr_fsr;
  53         unsigned char   pr_qcnt;
  54         unsigned char   pr_q_entrysize;
  55         unsigned char   pr_en;
  56         unsigned int    pr_q[64];
  57 } elf_fpregset_t;
  58
  59 /* UltraSparc extensions.  Still unused, but will be eventually.  */
  60 typedef struct {
  61         unsigned int pr_type;
  62         unsigned int pr_align;
  63         union {
  64                 struct {
  65                         union {
  66                                 unsigned int    pr_regs[32];
  67                                 unsigned long   pr_dregs[16];
  68                                 long double     pr_qregs[8];
  69                         } pr_xfr;
  70                 } pr_v8p;
  71                 unsigned int    pr_xfsr;
  72                 unsigned int    pr_fprs;
  73                 unsigned int    pr_xg[8];
  74                 unsigned int    pr_xo[8];
  75                 unsigned long   pr_tstate;
  76                 unsigned int    pr_filler[8];
  77         } pr_un;
  78 } elf_xregset_t;
  79
  80 #define elf_check_arch(x)       (((x)->e_machine == EM_SPARC) || ((x)->e_machine == EM_SPARC32PLUS))
  81
  82 #define ELF_ET_DYN_BASE         0x70000000
  83
  84
  85 #include <asm/processor.h>
  86 #include <linux/module.h>
  87 #include <linux/config.h>
  88 #include <linux/elfcore.h>
  89 #include <linux/compat.h>
  90
  91 #define elf_prstatus elf_prstatus32
  92 struct elf_prstatus32
  93 {
  94         struct elf_siginfo pr_info;     /* Info associated with signal */
  95         short   pr_cursig;              /* Current signal */
  96         unsigned int pr_sigpend;        /* Set of pending signals */
  97         unsigned int pr_sighold;        /* Set of held signals */
  98         pid_t   pr_pid;
  99         pid_t   pr_ppid;
 100         pid_t   pr_pgrp;
 101         pid_t   pr_sid;
 102         struct compat_timeval pr_utime; /* User time */
 103         struct compat_timeval pr_stime; /* System time */
 104         struct compat_timeval pr_cutime;        /* Cumulative user time */
 105         struct compat_timeval pr_cstime;        /* Cumulative system time */
 106         elf_gregset_t pr_reg;   /* GP registers */
 107         int pr_fpvalid;         /* True if math co-processor being used.  */
 108 };
 109
 110 #define elf_prpsinfo elf_prpsinfo32
 111 struct elf_prpsinfo32
 112 {
 113         char    pr_state;       /* numeric process state */
 114         char    pr_sname;       /* char for pr_state */
 115         char    pr_zomb;        /* zombie */
 116         char    pr_nice;        /* nice val */
 117         unsigned int pr_flag;   /* flags */
 118         u16     pr_uid;
 119         u16     pr_gid;
 120         pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
 121         /* Lots missing */
 122         char    pr_fname[16];   /* filename of executable */
 123         char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
 124 };
 125
 126 #include <linux/highuid.h>
 127
 128 #undef NEW_TO_OLD_UID
 129 #undef NEW_TO_OLD_GID
 130 #define NEW_TO_OLD_UID(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
 131 #define NEW_TO_OLD_GID(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
 132
 133 #include <linux/time.h>
 134
 135 #undef cputime_to_timeval
 136 #define cputime_to_timeval cputime_to_compat_timeval
 137 static __inline__ void
 138 cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
 139 {
 140         unsigned long jiffies = cputime_to_jiffies(cputime);
 141         value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 142         value->tv_sec = jiffies / HZ;
 143 }
 144
 145 #define elf_addr_t      u32
 146 #undef start_thread
 147 #define start_thread start_thread32
 148 #define init_elf_binfmt init_elf32_binfmt
 149
 150 MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit SparcLinux binaries on the Ultra");
 151 MODULE_AUTHOR("Eric Youngdale, David S. Miller, Jakub Jelinek");
 152
 153 #undef MODULE_DESCRIPTION
 154 #undef MODULE_AUTHOR
 155
 156 #undef TASK_SIZE
 157 #define TASK_SIZE 0xf0000000
 158
 159 #include "../../../fs/binfmt_elf.c"