1/* 2 * Copyright 2010 Tilera Corporation. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 11 * NON INFRINGEMENT. See the GNU General Public License for 12 * more details. 13 */ 14#ifndef _ASM_TILE_PTRACE_H 15#define _ASM_TILE_PTRACE_H 16 17#include <linux/compiler.h> 18 19#ifndef __ASSEMBLY__ 20/* Benefit from consistent use of "long" on all chips. */ 21typedef unsigned long pt_reg_t; 22#endif 23 24#include <uapi/asm/ptrace.h> 25 26#define PTRACE_O_MASK_TILE (PTRACE_O_TRACEMIGRATE) 27#define PT_TRACE_MIGRATE PT_EVENT_FLAG(PTRACE_EVENT_MIGRATE) 28 29/* Flag bits in pt_regs.flags */ 30#define PT_FLAGS_DISABLE_IRQ 1 /* on return to kernel, disable irqs */ 31#define PT_FLAGS_CALLER_SAVES 2 /* caller-save registers are valid */ 32#define PT_FLAGS_RESTORE_REGS 4 /* restore callee-save regs on return */ 33 34#ifndef __ASSEMBLY__ 35 36#define regs_return_value(regs) ((regs)->regs[0]) 37#define instruction_pointer(regs) ((regs)->pc) 38#define profile_pc(regs) instruction_pointer(regs) 39#define user_stack_pointer(regs) ((regs)->sp) 40 41/* Does the process account for user or for system time? */ 42#define user_mode(regs) (EX1_PL((regs)->ex1) < KERNEL_PL) 43 44/* Fill in a struct pt_regs with the current kernel registers. */ 45struct pt_regs *get_pt_regs(struct pt_regs *); 46 47/* Trace the current syscall. */ 48extern int do_syscall_trace_enter(struct pt_regs *regs); 49extern void do_syscall_trace_exit(struct pt_regs *regs); 50 51#define arch_has_single_step() (1) 52 53/* 54 * A structure for all single-stepper state. 55 * 56 * Also update defines in assembler section if it changes 57 */ 58struct single_step_state { 59 /* the page to which we will write hacked-up bundles */ 60 void __user *buffer; 61 62 union { 63 int flags; 64 struct { 65 unsigned long is_enabled:1, update:1, update_reg:6; 66 }; 67 }; 68 69 unsigned long orig_pc; /* the original PC */ 70 unsigned long next_pc; /* return PC if no branch (PC + 1) */ 71 unsigned long branch_next_pc; /* return PC if we did branch/jump */ 72 unsigned long update_value; /* value to restore to update_target */ 73}; 74 75/* Single-step the instruction at regs->pc */ 76extern void single_step_once(struct pt_regs *regs); 77 78/* Clean up after execve(). */ 79extern void single_step_execve(void); 80 81struct task_struct; 82 83extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs); 84 85#ifdef __tilegx__ 86/* We need this since sigval_t has a user pointer in it, for GETSIGINFO etc. */ 87#define __ARCH_WANT_COMPAT_SYS_PTRACE 88#endif 89 90#endif /* !__ASSEMBLY__ */ 91 92#define SINGLESTEP_STATE_MASK_IS_ENABLED 0x1 93#define SINGLESTEP_STATE_MASK_UPDATE 0x2 94#define SINGLESTEP_STATE_TARGET_LB 2 95#define SINGLESTEP_STATE_TARGET_UB 7 96 97#endif /* _ASM_TILE_PTRACE_H */ 98