um/asm/ptrace.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __UM_X86_PTRACE_H
0003 #define __UM_X86_PTRACE_H
0004
0005 #include <linux/compiler.h>
0006 #ifndef CONFIG_X86_32
0007 #define __FRAME_OFFSETS /* Needed to get the R* macros */
0008 #endif
0009 #include <asm/ptrace-generic.h>
0010
0011 #define user_mode(r) UPT_IS_USER(&(r)->regs)
0012
0013 #define PT_REGS_AX(r) UPT_AX(&(r)->regs)
0014 #define PT_REGS_BX(r) UPT_BX(&(r)->regs)
0015 #define PT_REGS_CX(r) UPT_CX(&(r)->regs)
0016 #define PT_REGS_DX(r) UPT_DX(&(r)->regs)
0017
0018 #define PT_REGS_SI(r) UPT_SI(&(r)->regs)
0019 #define PT_REGS_DI(r) UPT_DI(&(r)->regs)
0020 #define PT_REGS_BP(r) UPT_BP(&(r)->regs)
0021 #define PT_REGS_EFLAGS(r) UPT_EFLAGS(&(r)->regs)
0022
0023 #define PT_REGS_CS(r) UPT_CS(&(r)->regs)
0024 #define PT_REGS_SS(r) UPT_SS(&(r)->regs)
0025 #define PT_REGS_DS(r) UPT_DS(&(r)->regs)
0026 #define PT_REGS_ES(r) UPT_ES(&(r)->regs)
0027
0028 #define PT_REGS_ORIG_SYSCALL(r) PT_REGS_AX(r)
0029 #define PT_REGS_SYSCALL_RET(r) PT_REGS_AX(r)
0030
0031 #define PT_FIX_EXEC_STACK(sp) do ; while(0)
0032
0033 #define profile_pc(regs) PT_REGS_IP(regs)
0034
0035 #define UPT_RESTART_SYSCALL(r) (UPT_IP(r) -= 2)
0036 #define PT_REGS_SET_SYSCALL_RETURN(r, res) (PT_REGS_AX(r) = (res))
0037
0038 static inline long regs_return_value(struct pt_regs *regs)
0039 {
0040     return PT_REGS_AX(regs);
0041 }
0042
0043 /*
0044  * Forward declaration to avoid including sysdep/tls.h, which causes a
0045  * circular include, and compilation failures.
0046  */
0047 struct user_desc;
0048
0049 #ifdef CONFIG_X86_32
0050
0051 extern int ptrace_get_thread_area(struct task_struct *child, int idx,
0052                                   struct user_desc __user *user_desc);
0053
0054 extern int ptrace_set_thread_area(struct task_struct *child, int idx,
0055                                   struct user_desc __user *user_desc);
0056
0057 #else
0058
0059 #define PT_REGS_R8(r) UPT_R8(&(r)->regs)
0060 #define PT_REGS_R9(r) UPT_R9(&(r)->regs)
0061 #define PT_REGS_R10(r) UPT_R10(&(r)->regs)
0062 #define PT_REGS_R11(r) UPT_R11(&(r)->regs)
0063 #define PT_REGS_R12(r) UPT_R12(&(r)->regs)
0064 #define PT_REGS_R13(r) UPT_R13(&(r)->regs)
0065 #define PT_REGS_R14(r) UPT_R14(&(r)->regs)
0066 #define PT_REGS_R15(r) UPT_R15(&(r)->regs)
0067
0068 #include <asm/errno.h>
0069
0070 static inline int ptrace_get_thread_area(struct task_struct *child, int idx,
0071                                          struct user_desc __user *user_desc)
0072 {
0073         return -ENOSYS;
0074 }
0075
0076 static inline int ptrace_set_thread_area(struct task_struct *child, int idx,
0077                                          struct user_desc __user *user_desc)
0078 {
0079         return -ENOSYS;
0080 }
0081
0082 extern long arch_prctl(struct task_struct *task, int option,
0083                unsigned long __user *addr);
0084
0085 #endif
0086 #define user_stack_pointer(regs) PT_REGS_SP(regs)
0087 #endif /* __UM_X86_PTRACE_H */