arch/powerpc/kernel/ppc32.h

   1 #ifndef _PPC64_PPC32_H
   2 #define _PPC64_PPC32_H
   3
   4 #include <linux/compat.h>
   5 #include <asm/siginfo.h>
   6 #include <asm/signal.h>
   7
   8 /*
   9  * Data types and macros for providing 32b PowerPC support.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version
  14  * 2 of the License, or (at your option) any later version.
  15  */
  16
  17 /* These are here to support 32-bit syscalls on a 64-bit kernel. */
  18
  19 #define __old_sigaction32       old_sigaction32
  20
  21 struct __old_sigaction32 {
  22         compat_uptr_t           sa_handler;
  23         compat_old_sigset_t     sa_mask;
  24         unsigned int            sa_flags;
  25         compat_uptr_t           sa_restorer;     /* not used by Linux/SPARC yet */
  26 };
  27
  28
  29
  30 struct sigaction32 {
  31        compat_uptr_t  sa_handler;       /* Really a pointer, but need to deal with 32 bits */
  32        unsigned int sa_flags;
  33        compat_uptr_t sa_restorer;       /* Another 32 bit pointer */
  34        compat_sigset_t sa_mask;         /* A 32 bit mask */
  35 };
  36
  37 typedef struct sigaltstack_32 {
  38         unsigned int ss_sp;
  39         int ss_flags;
  40         compat_size_t ss_size;
  41 } stack_32_t;
  42
  43 struct pt_regs32 {
  44         unsigned int gpr[32];
  45         unsigned int nip;
  46         unsigned int msr;
  47         unsigned int orig_gpr3;         /* Used for restarting system calls */
  48         unsigned int ctr;
  49         unsigned int link;
  50         unsigned int xer;
  51         unsigned int ccr;
  52         unsigned int mq;                /* 601 only (not used at present) */
  53         unsigned int trap;              /* Reason for being here */
  54         unsigned int dar;               /* Fault registers */
  55         unsigned int dsisr;
  56         unsigned int result;            /* Result of a system call */
  57 };
  58
  59 struct sigcontext32 {
  60         unsigned int    _unused[4];
  61         int             signal;
  62         compat_uptr_t   handler;
  63         unsigned int    oldmask;
  64         compat_uptr_t   regs;  /* 4 byte pointer to the pt_regs32 structure. */
  65 };
  66
  67 struct mcontext32 {
  68         elf_gregset_t32         mc_gregs;
  69         elf_fpregset_t          mc_fregs;
  70         unsigned int            mc_pad[2];
  71         elf_vrregset_t32        mc_vregs __attribute__((__aligned__(16)));
  72         elf_vsrreghalf_t32      mc_vsregs __attribute__((__aligned__(16)));
  73 };
  74
  75 struct ucontext32 {
  76         unsigned int            uc_flags;
  77         unsigned int            uc_link;
  78         stack_32_t              uc_stack;
  79         int                     uc_pad[7];
  80         compat_uptr_t           uc_regs;        /* points to uc_mcontext field */
  81         compat_sigset_t         uc_sigmask;     /* mask last for extensibility */
  82         /* glibc has 1024-bit signal masks, ours are 64-bit */
  83         int                     uc_maskext[30];
  84         int                     uc_pad2[3];
  85         struct mcontext32       uc_mcontext;
  86 };
  87
  88 #endif  /* _PPC64_PPC32_H */