arch/parisc/kernel/binfmt_elf32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Support for 32-bit Linux/Parisc ELF binaries on 64 bit kernels
   4  *
   5  * Copyright (C) 2000 John Marvin
   6  * Copyright (C) 2000 Hewlett Packard Co.
   7  *
   8  * Heavily inspired from various other efforts to do the same thing
   9  * (ia64,sparc64/mips64)
  10  */
  11
  12 /* Make sure include/asm-parisc/elf.h does the right thing */
  13
  14 #define ELF_CLASS       ELFCLASS32
  15
  16 #define ELF_CORE_COPY_REGS(dst, pt)     \
  17         memset(dst, 0, sizeof(dst));    /* don't leak any "random" bits */ \
  18         {       int i; \
  19                 for (i = 0; i < 32; i++) dst[i] = (elf_greg_t) pt->gr[i]; \
  20                 for (i = 0; i < 8; i++) dst[32 + i] = (elf_greg_t) pt->sr[i]; \
  21         } \
  22         dst[40] = (elf_greg_t) pt->iaoq[0]; dst[41] = (elf_greg_t) pt->iaoq[1]; \
  23         dst[42] = (elf_greg_t) pt->iasq[0]; dst[43] = (elf_greg_t) pt->iasq[1]; \
  24         dst[44] = (elf_greg_t) pt->sar;   dst[45] = (elf_greg_t) pt->iir; \
  25         dst[46] = (elf_greg_t) pt->isr;   dst[47] = (elf_greg_t) pt->ior; \
  26         dst[48] = (elf_greg_t) mfctl(22); dst[49] = (elf_greg_t) mfctl(0); \
  27         dst[50] = (elf_greg_t) mfctl(24); dst[51] = (elf_greg_t) mfctl(25); \
  28         dst[52] = (elf_greg_t) mfctl(26); dst[53] = (elf_greg_t) mfctl(27); \
  29         dst[54] = (elf_greg_t) mfctl(28); dst[55] = (elf_greg_t) mfctl(29); \
  30         dst[56] = (elf_greg_t) mfctl(30); dst[57] = (elf_greg_t) mfctl(31); \
  31         dst[58] = (elf_greg_t) mfctl( 8); dst[59] = (elf_greg_t) mfctl( 9); \
  32         dst[60] = (elf_greg_t) mfctl(12); dst[61] = (elf_greg_t) mfctl(13); \
  33         dst[62] = (elf_greg_t) mfctl(10); dst[63] = (elf_greg_t) mfctl(15);
  34
  35
  36 typedef unsigned int elf_greg_t;
  37
  38 #include <linux/spinlock.h>
  39 #include <asm/processor.h>
  40 #include <linux/module.h>
  41 #include <linux/elfcore.h>
  42 #include <linux/compat.h>               /* struct compat_timeval */
  43
  44 #define elf_prstatus elf_prstatus32
  45 struct elf_prstatus32
  46 {
  47         struct elf_siginfo pr_info;     /* Info associated with signal */
  48         short   pr_cursig;              /* Current signal */
  49         unsigned int pr_sigpend;        /* Set of pending signals */
  50         unsigned int pr_sighold;        /* Set of held signals */
  51         pid_t   pr_pid;
  52         pid_t   pr_ppid;
  53         pid_t   pr_pgrp;
  54         pid_t   pr_sid;
  55         struct compat_timeval pr_utime;         /* User time */
  56         struct compat_timeval pr_stime;         /* System time */
  57         struct compat_timeval pr_cutime;        /* Cumulative user time */
  58         struct compat_timeval pr_cstime;        /* Cumulative system time */
  59         elf_gregset_t pr_reg;   /* GP registers */
  60         int pr_fpvalid;         /* True if math co-processor being used.  */
  61 };
  62
  63 #define elf_prpsinfo elf_prpsinfo32
  64 struct elf_prpsinfo32
  65 {
  66         char    pr_state;       /* numeric process state */
  67         char    pr_sname;       /* char for pr_state */
  68         char    pr_zomb;        /* zombie */
  69         char    pr_nice;        /* nice val */
  70         unsigned int pr_flag;   /* flags */
  71         u16     pr_uid;
  72         u16     pr_gid;
  73         pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  74         /* Lots missing */
  75         char    pr_fname[16];   /* filename of executable */
  76         char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  77 };
  78
  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 #undef SET_PERSONALITY
  90 #define SET_PERSONALITY(ex) \
  91         set_thread_flag(TIF_32BIT); \
  92         current->thread.map_base = DEFAULT_MAP_BASE32; \
  93         current->thread.task_size = DEFAULT_TASK_SIZE32 \
  94
  95 #undef ns_to_timeval
  96 #define ns_to_timeval ns_to_compat_timeval
  97
  98 #include "../../../fs/binfmt_elf.c"