arch/parisc/include/asm/ptrace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* written by Philipp Rumpf, Copyright (C) 1999 SuSE GmbH Nuernberg
   3 ** Copyright (C) 2000 Grant Grundler, Hewlett-Packard
   4 */
   5 #ifndef _PARISC_PTRACE_H
   6 #define _PARISC_PTRACE_H
   7
   8 #include <uapi/asm/ptrace.h>
   9
  10
  11 #define task_regs(task) ((struct pt_regs *) ((char *)(task) + TASK_REGS))
  12
  13 #define arch_has_single_step()  1
  14 #define arch_has_block_step()   1
  15
  16 /* XXX should we use iaoq[1] or iaoq[0] ? */
  17 #define user_mode(regs)                 (((regs)->iaoq[0] & 3) ? 1 : 0)
  18 #define user_space(regs)                (((regs)->iasq[1] != 0) ? 1 : 0)
  19 #define instruction_pointer(regs)       ((regs)->iaoq[0] & ~3)
  20 #define user_stack_pointer(regs)        ((regs)->gr[30])
  21 unsigned long profile_pc(struct pt_regs *);
  22
  23 static inline unsigned long regs_return_value(struct pt_regs *regs)
  24 {
  25         return regs->gr[28];
  26 }
  27
  28 static inline void instruction_pointer_set(struct pt_regs *regs,
  29                                                 unsigned long val)
  30 {
  31         regs->iaoq[0] = val;
  32         regs->iaoq[1] = val + 4;
  33 }
  34
  35 /* Query offset/name of register from its name/offset */
  36 extern int regs_query_register_offset(const char *name);
  37 extern const char *regs_query_register_name(unsigned int offset);
  38 #define MAX_REG_OFFSET (offsetof(struct pt_regs, ipsw))
  39
  40 #define kernel_stack_pointer(regs) ((regs)->gr[30])
  41
  42 static inline unsigned long regs_get_register(struct pt_regs *regs,
  43                                               unsigned int offset)
  44 {
  45         if (unlikely(offset > MAX_REG_OFFSET))
  46                 return 0;
  47         return *(unsigned long *)((unsigned long)regs + offset);
  48 }
  49
  50 unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);
  51 int regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr);
  52
  53 #endif