ptrace.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef __UM_X86_PTRACE_H
  3#define __UM_X86_PTRACE_H
  4
  5/* This is here because signal.c needs the REGSET_FP_LEGACY definition */
  6enum {
  7	REGSET_GENERAL,
  8#ifdef CONFIG_X86_32
  9	REGSET_FP_LEGACY,
 10#endif
 11	REGSET_FP,
 12	REGSET_XSTATE,
 13};
 14
 15#include <linux/compiler.h>
 16#ifndef CONFIG_X86_32
 17#define __FRAME_OFFSETS /* Needed to get the R* macros */
 18#endif
 19#include <asm/ptrace-generic.h>
 20
 21#define user_mode(r) UPT_IS_USER(&(r)->regs)
 22
 23#define PT_REGS_AX(r) UPT_AX(&(r)->regs)
 24#define PT_REGS_BX(r) UPT_BX(&(r)->regs)
 25#define PT_REGS_CX(r) UPT_CX(&(r)->regs)
 26#define PT_REGS_DX(r) UPT_DX(&(r)->regs)
 27
 28#define PT_REGS_SI(r) UPT_SI(&(r)->regs)
 29#define PT_REGS_DI(r) UPT_DI(&(r)->regs)
 30#define PT_REGS_BP(r) UPT_BP(&(r)->regs)
 31#define PT_REGS_EFLAGS(r) UPT_EFLAGS(&(r)->regs)
 32
 33#define PT_REGS_CS(r) UPT_CS(&(r)->regs)
 34#define PT_REGS_SS(r) UPT_SS(&(r)->regs)
 35#define PT_REGS_DS(r) UPT_DS(&(r)->regs)
 36#define PT_REGS_ES(r) UPT_ES(&(r)->regs)
 37
 38#define PT_REGS_ORIG_SYSCALL(r) PT_REGS_AX(r)
 39#define PT_REGS_SYSCALL_RET(r) PT_REGS_AX(r)
 40
 41#define PT_FIX_EXEC_STACK(sp) do ; while(0)
 42
 43#define profile_pc(regs) PT_REGS_IP(regs)
 44
 45#define UPT_RESTART_SYSCALL(r) (UPT_IP(r) -= 2)
 46#define PT_REGS_SET_SYSCALL_RETURN(r, res) (PT_REGS_AX(r) = (res))
 47
 48static inline long regs_return_value(struct pt_regs *regs)
 49{
 50	return PT_REGS_AX(regs);
 51}
 52
 53/*
 54 * Forward declaration to avoid including sysdep/tls.h, which causes a
 55 * circular include, and compilation failures.
 56 */
 57struct user_desc;
 58
 59#ifdef CONFIG_X86_32
 60
 61extern int ptrace_get_thread_area(struct task_struct *child, int idx,
 62                                  struct user_desc __user *user_desc);
 63
 64extern int ptrace_set_thread_area(struct task_struct *child, int idx,
 65                                  struct user_desc __user *user_desc);
 66
 67extern int arch_switch_tls(struct task_struct *to);
 68
 69#else
 70
 71#define PT_REGS_R8(r) UPT_R8(&(r)->regs)
 72#define PT_REGS_R9(r) UPT_R9(&(r)->regs)
 73#define PT_REGS_R10(r) UPT_R10(&(r)->regs)
 74#define PT_REGS_R11(r) UPT_R11(&(r)->regs)
 75#define PT_REGS_R12(r) UPT_R12(&(r)->regs)
 76#define PT_REGS_R13(r) UPT_R13(&(r)->regs)
 77#define PT_REGS_R14(r) UPT_R14(&(r)->regs)
 78#define PT_REGS_R15(r) UPT_R15(&(r)->regs)
 79
 80#include <asm/errno.h>
 81
 82static inline int ptrace_get_thread_area(struct task_struct *child, int idx,
 83                                         struct user_desc __user *user_desc)
 84{
 85        return -ENOSYS;
 86}
 87
 88static inline int ptrace_set_thread_area(struct task_struct *child, int idx,
 89                                         struct user_desc __user *user_desc)
 90{
 91        return -ENOSYS;
 92}
 93
 94extern long arch_prctl(struct task_struct *task, int option,
 95		       unsigned long __user *addr);
 96
 97#endif
 98
 99#define user_stack_pointer(regs) PT_REGS_SP(regs)
100
101extern void arch_switch_to(struct task_struct *to);
102
103#endif /* __UM_X86_PTRACE_H */