2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
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.
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
14 #ifndef _ASM_TILE_PTRACE_H
15 #define _ASM_TILE_PTRACE_H
17 #include <linux/compiler.h>
20 /* Benefit from consistent use of "long" on all chips. */
21 typedef unsigned long pt_reg_t;
24 #include <uapi/asm/ptrace.h>
26 #define PTRACE_O_MASK_TILE (PTRACE_O_TRACEMIGRATE)
27 #define PT_TRACE_MIGRATE 0x00080000
28 #define PT_TRACE_MASK_TILE (PT_TRACE_MIGRATE)
30 /* Flag bits in pt_regs.flags */
31 #define PT_FLAGS_DISABLE_IRQ 1 /* on return to kernel, disable irqs */
32 #define PT_FLAGS_CALLER_SAVES 2 /* caller-save registers are valid */
33 #define PT_FLAGS_RESTORE_REGS 4 /* restore callee-save regs on return */
37 #define instruction_pointer(regs) ((regs)->pc)
38 #define profile_pc(regs) instruction_pointer(regs)
39 #define user_stack_pointer(regs) ((regs)->sp)
41 /* Does the process account for user or for system time? */
42 #define user_mode(regs) (EX1_PL((regs)->ex1) == USER_PL)
44 /* Fill in a struct pt_regs with the current kernel registers. */
45 struct pt_regs *get_pt_regs(struct pt_regs *);
47 /* Trace the current syscall. */
48 extern void do_syscall_trace(void);
50 #define arch_has_single_step() (1)
53 * A structure for all single-stepper state.
55 * Also update defines in assembler section if it changes
57 struct single_step_state {
58 /* the page to which we will write hacked-up bundles */
64 unsigned long is_enabled:1, update:1, update_reg:6;
68 unsigned long orig_pc; /* the original PC */
69 unsigned long next_pc; /* return PC if no branch (PC + 1) */
70 unsigned long branch_next_pc; /* return PC if we did branch/jump */
71 unsigned long update_value; /* value to restore to update_target */
74 /* Single-step the instruction at regs->pc */
75 extern void single_step_once(struct pt_regs *regs);
77 /* Clean up after execve(). */
78 extern void single_step_execve(void);
82 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
86 /* We need this since sigval_t has a user pointer in it, for GETSIGINFO etc. */
87 #define __ARCH_WANT_COMPAT_SYS_PTRACE
90 #endif /* !__ASSEMBLY__ */
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
97 #endif /* _ASM_TILE_PTRACE_H */