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, 2008 David S. Miller (davem@davemloft.net)
   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 /* Format is:
  13  *      G0 --> G7
  14  *      O0 --> O7
  15  *      L0 --> L7
  16  *      I0 --> I7
  17  *      PSR, PC, nPC, Y, WIM, TBR
  18  */
  19 typedef unsigned int elf_greg_t;
  20 #define ELF_NGREG 38
  21 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  22
  23 typedef struct {
  24         union {
  25                 unsigned int    pr_regs[32];
  26                 unsigned long   pr_dregs[16];
  27         } pr_fr;
  28         unsigned int __unused;
  29         unsigned int    pr_fsr;
  30         unsigned char   pr_qcnt;
  31         unsigned char   pr_q_entrysize;
  32         unsigned char   pr_en;
  33         unsigned int    pr_q[64];
  34 } elf_fpregset_t;
  35
  36 /* UltraSparc extensions.  Still unused, but will be eventually.  */
  37 typedef struct {
  38         unsigned int pr_type;
  39         unsigned int pr_align;
  40         union {
  41                 struct {
  42                         union {
  43                                 unsigned int    pr_regs[32];
  44                                 unsigned long   pr_dregs[16];
  45                                 long double     pr_qregs[8];
  46                         } pr_xfr;
  47                 } pr_v8p;
  48                 unsigned int    pr_xfsr;
  49                 unsigned int    pr_fprs;
  50                 unsigned int    pr_xg[8];
  51                 unsigned int    pr_xo[8];
  52                 unsigned long   pr_tstate;
  53                 unsigned int    pr_filler[8];
  54         } pr_un;
  55 } elf_xregset_t;
  56
  57 #define elf_check_arch(x)       (((x)->e_machine == EM_SPARC) || ((x)->e_machine == EM_SPARC32PLUS))
  58
  59 #define ELF_ET_DYN_BASE         0x70000000
  60
  61
  62 #include <asm/processor.h>
  63 #include <linux/module.h>
  64 #include <linux/elfcore.h>
  65 #include <linux/compat.h>
  66
  67 #define elf_prstatus elf_prstatus32
  68 struct elf_prstatus32
  69 {
  70         struct elf_siginfo pr_info;     /* Info associated with signal */
  71         short   pr_cursig;              /* Current signal */
  72         unsigned int pr_sigpend;        /* Set of pending signals */
  73         unsigned int pr_sighold;        /* Set of held signals */
  74         pid_t   pr_pid;
  75         pid_t   pr_ppid;
  76         pid_t   pr_pgrp;
  77         pid_t   pr_sid;
  78         struct compat_timeval pr_utime; /* User time */
  79         struct compat_timeval pr_stime; /* System time */
  80         struct compat_timeval pr_cutime;        /* Cumulative user time */
  81         struct compat_timeval pr_cstime;        /* Cumulative system time */
  82         elf_gregset_t pr_reg;   /* GP registers */
  83         int pr_fpvalid;         /* True if math co-processor being used.  */
  84 };
  85
  86 #define elf_prpsinfo elf_prpsinfo32
  87 struct elf_prpsinfo32
  88 {
  89         char    pr_state;       /* numeric process state */
  90         char    pr_sname;       /* char for pr_state */
  91         char    pr_zomb;        /* zombie */
  92         char    pr_nice;        /* nice val */
  93         unsigned int pr_flag;   /* flags */
  94         u16     pr_uid;
  95         u16     pr_gid;
  96         pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  97         /* Lots missing */
  98         char    pr_fname[16];   /* filename of executable */
  99         char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
 100 };
 101
 102 #include <linux/highuid.h>
 103
 104 #undef NEW_TO_OLD_UID
 105 #undef NEW_TO_OLD_GID
 106 #define NEW_TO_OLD_UID(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
 107 #define NEW_TO_OLD_GID(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
 108
 109 #include <linux/time.h>
 110
 111 #undef cputime_to_timeval
 112 #define cputime_to_timeval cputime_to_compat_timeval
 113 static inline void
 114 cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
 115 {
 116         unsigned long jiffies = cputime_to_jiffies(cputime);
 117         value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 118         value->tv_sec = jiffies / HZ;
 119 }
 120
 121 #undef start_thread
 122 #define start_thread start_thread32
 123 #define init_elf_binfmt init_elf32_binfmt
 124
 125 MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit SparcLinux binaries on the Ultra");
 126 MODULE_AUTHOR("Eric Youngdale, David S. Miller, Jakub Jelinek");
 127
 128 #undef MODULE_DESCRIPTION
 129 #undef MODULE_AUTHOR
 130
 131 #include <asm/a.out.h>
 132
 133 #undef TASK_SIZE
 134 #define TASK_SIZE STACK_TOP32
 135
 136 #include "../../../fs/binfmt_elf.c"