arch/parisc/kernel/binfmt_elf32.c

   1 /*
   2  * Support for 32-bit Linux/Parisc ELF binaries on 64 bit kernels
   3  *
   4  * Copyright (C) 2000 John Marvin
   5  * Copyright (C) 2000 Hewlett Packard Co.
   6  *
   7  * Heavily inspired from various other efforts to do the same thing
   8  * (ia64,sparc64/mips64)
   9  */
  10
  11 /* Make sure include/asm-parisc/elf.h does the right thing */
  12
  13 #define ELF_CLASS       ELFCLASS32
  14
  15 #define ELF_CORE_COPY_REGS(dst, pt)     \
  16         memset(dst, 0, sizeof(dst));    /* don't leak any "random" bits */ \
  17         {       int i; \
  18                 for (i = 0; i < 32; i++) dst[i] = (elf_greg_t) pt->gr[i]; \
  19                 for (i = 0; i < 8; i++) dst[32 + i] = (elf_greg_t) pt->sr[i]; \
  20         } \
  21         dst[40] = (elf_greg_t) pt->iaoq[0]; dst[41] = (elf_greg_t) pt->iaoq[1]; \
  22         dst[42] = (elf_greg_t) pt->iasq[0]; dst[43] = (elf_greg_t) pt->iasq[1]; \
  23         dst[44] = (elf_greg_t) pt->sar;   dst[45] = (elf_greg_t) pt->iir; \
  24         dst[46] = (elf_greg_t) pt->isr;   dst[47] = (elf_greg_t) pt->ior; \
  25         dst[48] = (elf_greg_t) mfctl(22); dst[49] = (elf_greg_t) mfctl(0); \
  26         dst[50] = (elf_greg_t) mfctl(24); dst[51] = (elf_greg_t) mfctl(25); \
  27         dst[52] = (elf_greg_t) mfctl(26); dst[53] = (elf_greg_t) mfctl(27); \
  28         dst[54] = (elf_greg_t) mfctl(28); dst[55] = (elf_greg_t) mfctl(29); \
  29         dst[56] = (elf_greg_t) mfctl(30); dst[57] = (elf_greg_t) mfctl(31); \
  30         dst[58] = (elf_greg_t) mfctl( 8); dst[59] = (elf_greg_t) mfctl( 9); \
  31         dst[60] = (elf_greg_t) mfctl(12); dst[61] = (elf_greg_t) mfctl(13); \
  32         dst[62] = (elf_greg_t) mfctl(10); dst[63] = (elf_greg_t) mfctl(15);
  33
  34
  35 typedef unsigned int elf_greg_t;
  36
  37 #include <linux/spinlock.h>
  38 #include <asm/processor.h>
  39 #include <linux/module.h>
  40 #include <linux/elfcore.h>
  41 #include <linux/compat.h>               /* struct compat_timeval */
  42
  43 #define elf_prstatus elf_prstatus32
  44 struct elf_prstatus32
  45 {
  46         struct elf_siginfo pr_info;     /* Info associated with signal */
  47         short   pr_cursig;              /* Current signal */
  48         unsigned int pr_sigpend;        /* Set of pending signals */
  49         unsigned int pr_sighold;        /* Set of held signals */
  50         pid_t   pr_pid;
  51         pid_t   pr_ppid;
  52         pid_t   pr_pgrp;
  53         pid_t   pr_sid;
  54         struct compat_timeval pr_utime;         /* User time */
  55         struct compat_timeval pr_stime;         /* System time */
  56         struct compat_timeval pr_cutime;        /* Cumulative user time */
  57         struct compat_timeval pr_cstime;        /* Cumulative system time */
  58         elf_gregset_t pr_reg;   /* GP registers */
  59         int pr_fpvalid;         /* True if math co-processor being used.  */
  60 };
  61
  62 #define elf_prpsinfo elf_prpsinfo32
  63 struct elf_prpsinfo32
  64 {
  65         char    pr_state;       /* numeric process state */
  66         char    pr_sname;       /* char for pr_state */
  67         char    pr_zomb;        /* zombie */
  68         char    pr_nice;        /* nice val */
  69         unsigned int pr_flag;   /* flags */
  70         u16     pr_uid;
  71         u16     pr_gid;
  72         pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  73         /* Lots missing */
  74         char    pr_fname[16];   /* filename of executable */
  75         char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  76 };
  77
  78 #define elf_addr_t      unsigned int
  79 #define init_elf_binfmt init_elf32_binfmt
  80
  81 #define ELF_PLATFORM  ("PARISC32\0")
  82
  83 /*
  84  * We should probably use this macro to set a flag somewhere to indicate
  85  * this is a 32 on 64 process. We could use PER_LINUX_32BIT, or we
  86  * could set a processor dependent flag in the thread_struct.
  87  */
  88
  89 #define SET_PERSONALITY(ex, ibcs2) \
  90         current->personality = PER_LINUX32; \
  91         current->thread.map_base = DEFAULT_MAP_BASE32; \
  92         current->thread.task_size = DEFAULT_TASK_SIZE32 \
  93
  94 #undef cputime_to_timeval
  95 #define cputime_to_timeval cputime_to_compat_timeval
  96 static __inline__ void
  97 cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
  98 {
  99         unsigned long jiffies = cputime_to_jiffies(cputime);
 100         value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 101         value->tv_sec = jiffies / HZ;
 102 }
 103
 104 #include "../../../fs/binfmt_elf.c"
 105
 106 /* Set up a separate execution domain for ELF32 binaries running
 107  * on an ELF64 kernel */
 108
 109 static struct exec_domain parisc32_exec_domain = {
 110         .name = "Linux/ELF32",
 111         .pers_low = PER_LINUX32,
 112         .pers_high = PER_LINUX32,
 113 };
 114
 115 static int __init parisc32_exec_init(void)
 116 {
 117         /* steal the identity signal mappings from the default domain */
 118         parisc32_exec_domain.signal_map = default_exec_domain.signal_map;
 119         parisc32_exec_domain.signal_invmap = default_exec_domain.signal_invmap;
 120
 121         register_exec_domain(&parisc32_exec_domain);
 122
 123         return 0;
 124 }
 125
 126 __initcall(parisc32_exec_init);