arch/x86/um/asm/ptrace.h

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