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Linux/arch/nds32/include/asm/ptrace.h

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  1 // SPDX-License-Identifier: GPL-2.0
  2 // Copyright (C) 2005-2017 Andes Technology Corporation
  3 
  4 #ifndef __ASM_NDS32_PTRACE_H
  5 #define __ASM_NDS32_PTRACE_H
  6 
  7 #include <uapi/asm/ptrace.h>
  8 
  9 /*
 10  * If pt_regs.syscallno == NO_SYSCALL, then the thread is not executing
 11  * a syscall -- i.e., its most recent entry into the kernel from
 12  * userspace was not via syscall, or otherwise a tracer cancelled the
 13  * syscall.
 14  *
 15  * This must have the value -1, for ABI compatibility with ptrace etc.
 16  */
 17 #define NO_SYSCALL (-1)
 18 #ifndef __ASSEMBLY__
 19 #include <linux/types.h>
 20 
 21 struct pt_regs {
 22         union {
 23                 struct user_pt_regs user_regs;
 24                 struct {
 25                         long uregs[26];
 26                         long fp;
 27                         long gp;
 28                         long lp;
 29                         long sp;
 30                         long ipc;
 31 #if defined(CONFIG_HWZOL)
 32                         long lb;
 33                         long le;
 34                         long lc;
 35 #else
 36                         long dummy[3];
 37 #endif
 38                         long syscallno;
 39                 };
 40         };
 41         long orig_r0;
 42         long ir0;
 43         long ipsw;
 44         long pipsw;
 45         long pipc;
 46         long pp0;
 47         long pp1;
 48         long fucop_ctl;
 49         long osp;
 50 };
 51 
 52 static inline bool in_syscall(struct pt_regs const *regs)
 53 {
 54         return regs->syscallno != NO_SYSCALL;
 55 }
 56 
 57 static inline void forget_syscall(struct pt_regs *regs)
 58 {
 59         regs->syscallno = NO_SYSCALL;
 60 }
 61 static inline unsigned long regs_return_value(struct pt_regs *regs)
 62 {
 63         return regs->uregs[0];
 64 }
 65 extern void show_regs(struct pt_regs *);
 66 /* Avoid circular header include via sched.h */
 67 struct task_struct;
 68 
 69 #define arch_has_single_step()          (1)
 70 #define user_mode(regs)                 (((regs)->ipsw & PSW_mskPOM) == 0)
 71 #define interrupts_enabled(regs)        (!!((regs)->ipsw & PSW_mskGIE))
 72 #define user_stack_pointer(regs)        ((regs)->sp)
 73 #define instruction_pointer(regs)       ((regs)->ipc)
 74 #define profile_pc(regs)                instruction_pointer(regs)
 75 
 76 #endif /* __ASSEMBLY__ */
 77 #endif
 78 

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