tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 instruction_pointer(regs) ((regs)->pc)
37#define profile_pc(regs) instruction_pointer(regs)
38#define user_stack_pointer(regs) ((regs)->sp)
39
40/* Does the process account for user or for system time? */
41#define user_mode(regs) (EX1_PL((regs)->ex1) == USER_PL)
42
43/* Fill in a struct pt_regs with the current kernel registers. */
44struct pt_regs *get_pt_regs(struct pt_regs *);
45
46/* Trace the current syscall. */
47extern void do_syscall_trace(void);
48
49#define arch_has_single_step() (1)
50
51/*
52 * A structure for all single-stepper state.
53 *
54 * Also update defines in assembler section if it changes
55 */
56struct single_step_state {
57 /* the page to which we will write hacked-up bundles */
58 void __user *buffer;
59
60 union {
61 int flags;
62 struct {
63 unsigned long is_enabled:1, update:1, update_reg:6;
64 };
65 };
66
67 unsigned long orig_pc; /* the original PC */
68 unsigned long next_pc; /* return PC if no branch (PC + 1) */
69 unsigned long branch_next_pc; /* return PC if we did branch/jump */
70 unsigned long update_value; /* value to restore to update_target */
71};
72
73/* Single-step the instruction at regs->pc */
74extern void single_step_once(struct pt_regs *regs);
75
76/* Clean up after execve(). */
77extern void single_step_execve(void);
78
79struct task_struct;
80
81extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
82 int error_code);
83
84#ifdef __tilegx__
85/* We need this since sigval_t has a user pointer in it, for GETSIGINFO etc. */
86#define __ARCH_WANT_COMPAT_SYS_PTRACE
87#endif
88
89#endif /* !__ASSEMBLY__ */
90
91#define SINGLESTEP_STATE_MASK_IS_ENABLED 0x1
92#define SINGLESTEP_STATE_MASK_UPDATE 0x2
93#define SINGLESTEP_STATE_TARGET_LB 2
94#define SINGLESTEP_STATE_TARGET_UB 7
95
96#endif /* _ASM_TILE_PTRACE_H */