LXR uboot/arch/openrisc/include/asm/ptrace.h

   1/*
   2 * OpenRISC Linux
   3 *
   4 * Linux architectural port borrowing liberally from similar works of
   5 * others.  All original copyrights apply as per the original source
   6 * declaration.
   7 *
   8 * OpenRISC implementation:
   9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  11 * et al.
  12 *
  13 * SPDX-License-Identifier:     GPL-2.0+
  14 */
  15
  16#ifndef __ASM_OPENRISC_PTRACE_H
  17#define __ASM_OPENRISC_PTRACE_H
  18
  19#include <asm/spr-defs.h>
  20
  21#ifndef __ASSEMBLY__
  22/*
  23 * This is the layout of the regset returned by the GETREGSET ptrace call
  24 */
  25struct user_regs_struct {
  26        /* GPR R0-R31... */
  27        unsigned long gpr[32];
  28        unsigned long pc;
  29        unsigned long sr;
  30        unsigned long pad1;
  31        unsigned long pad2;
  32};
  33#endif
  34
  35#ifdef __KERNEL__
  36
  37/*
  38 * Make kernel PTrace/register structures opaque to userspace... userspace can
  39 * access thread state via the regset mechanism.  This allows us a bit of
  40 * flexibility in how we order the registers on the stack, permitting some
  41 * optimizations like packing call-clobbered registers together so that
  42 * they share a cacheline (not done yet, though... future optimization).
  43 */
  44
  45#ifndef __ASSEMBLY__
  46/*
  47 * This struct describes how the registers are laid out on the kernel stack
  48 * during a syscall or other kernel entry.
  49 *
  50 * This structure should always be cacheline aligned on the stack.
  51 * FIXME: I don't think that's the case right now.  The alignment is
  52 * taken care of elsewhere... head.S, process.c, etc.
  53 */
  54
  55struct pt_regs {
  56        union {
  57                struct {
  58                        /* Named registers */
  59                        long  sr;       /* Stored in place of r0 */
  60                        long  sp;       /* r1 */
  61                };
  62                struct {
  63                        /* Old style */
  64                        long offset[2];
  65                        long gprs[30];
  66                };
  67                struct {
  68                        /* New style */
  69                        long gpr[32];
  70                };
  71        };
  72        long  pc;
  73        long  orig_gpr11;       /* For restarting system calls */
  74        long  syscallno;        /* Syscall number (used by strace) */
  75        long dummy;             /* Cheap alignment fix */
  76};
  77#endif /* __ASSEMBLY__ */
  78
  79/* TODO: Rename this to REDZONE because that's what it is */
  80#define STACK_FRAME_OVERHEAD  128  /* size of minimum stack frame */
  81
  82#define instruction_pointer(regs)       ((regs)->pc)
  83#define user_mode(regs)                 (((regs)->sr & SPR_SR_SM) == 0)
  84#define user_stack_pointer(regs)        ((unsigned long)(regs)->sp)
  85#define profile_pc(regs)                instruction_pointer(regs)
  86
  87/*
  88 * Offsets used by 'ptrace' system call interface.
  89 */
  90#define PT_SR         0
  91#define PT_SP         4
  92#define PT_GPR2       8
  93#define PT_GPR3       12
  94#define PT_GPR4       16
  95#define PT_GPR5       20
  96#define PT_GPR6       24
  97#define PT_GPR7       28
  98#define PT_GPR8       32
  99#define PT_GPR9       36
 100#define PT_GPR10      40
 101#define PT_GPR11      44
 102#define PT_GPR12      48
 103#define PT_GPR13      52
 104#define PT_GPR14      56
 105#define PT_GPR15      60
 106#define PT_GPR16      64
 107#define PT_GPR17      68
 108#define PT_GPR18      72
 109#define PT_GPR19      76
 110#define PT_GPR20      80
 111#define PT_GPR21      84
 112#define PT_GPR22      88
 113#define PT_GPR23      92
 114#define PT_GPR24      96
 115#define PT_GPR25      100
 116#define PT_GPR26      104
 117#define PT_GPR27      108
 118#define PT_GPR28      112
 119#define PT_GPR29      116
 120#define PT_GPR30      120
 121#define PT_GPR31      124
 122#define PT_PC         128
 123#define PT_ORIG_GPR11 132
 124#define PT_SYSCALLNO  136
 125
 126#endif /* __KERNEL__ */
 127
 128#endif /* __ASM_OPENRISC_PTRACE_H */
 129