arch/um/sys-ppc/shared/sysdep/ptrace.h

   1 /*
   2  * Licensed under the GPL
   3  */
   4
   5 #ifndef __SYS_PTRACE_PPC_H
   6 #define __SYS_PTRACE_PPC_H
   7
   8 #include "linux/types.h"
   9
  10 /* the following taken from <asm-ppc/ptrace.h> */
  11
  12 #ifdef CONFIG_PPC64
  13 #define PPC_REG unsigned long /*long*/
  14 #else
  15 #define PPC_REG unsigned long
  16 #endif
  17 struct sys_pt_regs_s {
  18         PPC_REG gpr[32];
  19         PPC_REG nip;
  20         PPC_REG msr;
  21         PPC_REG orig_gpr3;      /* Used for restarting system calls */
  22         PPC_REG ctr;
  23         PPC_REG link;
  24         PPC_REG xer;
  25         PPC_REG ccr;
  26         PPC_REG mq;             /* 601 only (not used at present) */
  27                                 /* Used on APUS to hold IPL value. */
  28         PPC_REG trap;           /* Reason for being here */
  29         PPC_REG dar;            /* Fault registers */
  30         PPC_REG dsisr;
  31         PPC_REG result;         /* Result of a system call */
  32 };
  33
  34 #define NUM_REGS (sizeof(struct sys_pt_regs_s) / sizeof(PPC_REG))
  35
  36 struct sys_pt_regs {
  37     PPC_REG regs[sizeof(struct sys_pt_regs_s) / sizeof(PPC_REG)];
  38 };
  39
  40 #define UM_MAX_REG (PT_FPR0)
  41 #define UM_MAX_REG_OFFSET (UM_MAX_REG * sizeof(PPC_REG))
  42
  43 #define EMPTY_REGS { { [ 0 ... NUM_REGS - 1] = 0 } }
  44
  45 #define UM_REG(r, n) ((r)->regs[n])
  46
  47 #define UM_SYSCALL_RET(r) UM_REG(r, PT_R3)
  48 #define UM_SP(r) UM_REG(r, PT_R1)
  49 #define UM_IP(r) UM_REG(r, PT_NIP)
  50 #define UM_ELF_ZERO(r) UM_REG(r, PT_FPSCR)
  51 #define UM_SYSCALL_NR(r) UM_REG(r, PT_R0)
  52 #define UM_SYSCALL_ARG1(r) UM_REG(r, PT_ORIG_R3)
  53 #define UM_SYSCALL_ARG2(r) UM_REG(r, PT_R4)
  54 #define UM_SYSCALL_ARG3(r) UM_REG(r, PT_R5)
  55 #define UM_SYSCALL_ARG4(r) UM_REG(r, PT_R6)
  56 #define UM_SYSCALL_ARG5(r) UM_REG(r, PT_R7)
  57 #define UM_SYSCALL_ARG6(r) UM_REG(r, PT_R8)
  58
  59 #define UM_SYSCALL_NR_OFFSET (PT_R0 * sizeof(PPC_REG))
  60 #define UM_SYSCALL_RET_OFFSET (PT_R3 * sizeof(PPC_REG))
  61 #define UM_SYSCALL_ARG1_OFFSET (PT_R3 * sizeof(PPC_REG))
  62 #define UM_SYSCALL_ARG2_OFFSET (PT_R4 * sizeof(PPC_REG))
  63 #define UM_SYSCALL_ARG3_OFFSET (PT_R5 * sizeof(PPC_REG))
  64 #define UM_SYSCALL_ARG4_OFFSET (PT_R6 * sizeof(PPC_REG))
  65 #define UM_SYSCALL_ARG5_OFFSET (PT_R7 * sizeof(PPC_REG))
  66 #define UM_SYSCALL_ARG6_OFFSET (PT_R8 * sizeof(PPC_REG))
  67 #define UM_SP_OFFSET (PT_R1 * sizeof(PPC_REG))
  68 #define UM_IP_OFFSET (PT_NIP * sizeof(PPC_REG))
  69 #define UM_ELF_ZERO_OFFSET (PT_R3 * sizeof(PPC_REG))
  70
  71 #define UM_SET_SYSCALL_RETURN(_regs, result)            \
  72 do {                                                    \
  73         if (result < 0) {                               \
  74                 (_regs)->regs[PT_CCR] |= 0x10000000;    \
  75                 UM_SYSCALL_RET((_regs)) = -result;      \
  76         } else {                                        \
  77                 UM_SYSCALL_RET((_regs)) = result;       \
  78         }                                               \
  79 } while(0)
  80
  81 extern void shove_aux_table(unsigned long sp);
  82 #define UM_FIX_EXEC_STACK(sp) shove_aux_table(sp);
  83
  84 /* These aren't actually defined.  The undefs are just to make sure
  85  * everyone's clear on the concept.
  86  */
  87 #undef UML_HAVE_GETREGS
  88 #undef UML_HAVE_GETFPREGS
  89 #undef UML_HAVE_SETREGS
  90 #undef UML_HAVE_SETFPREGS
  91
  92 #endif
  93