051168df52
Technically, user privilege is anything less than kernel privilege. We modify the existing user_mode() macro to have this semantic (and use it in a couple of places it wasn't being used before), and add an IS_KERNEL_EX1() macro to the assembly code as well. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
97 lines
3 KiB
C
97 lines
3 KiB
C
/*
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
#ifndef _ASM_TILE_PTRACE_H
|
|
#define _ASM_TILE_PTRACE_H
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
/* Benefit from consistent use of "long" on all chips. */
|
|
typedef unsigned long pt_reg_t;
|
|
#endif
|
|
|
|
#include <uapi/asm/ptrace.h>
|
|
|
|
#define PTRACE_O_MASK_TILE (PTRACE_O_TRACEMIGRATE)
|
|
#define PT_TRACE_MIGRATE PT_EVENT_FLAG(PTRACE_EVENT_MIGRATE)
|
|
|
|
/* Flag bits in pt_regs.flags */
|
|
#define PT_FLAGS_DISABLE_IRQ 1 /* on return to kernel, disable irqs */
|
|
#define PT_FLAGS_CALLER_SAVES 2 /* caller-save registers are valid */
|
|
#define PT_FLAGS_RESTORE_REGS 4 /* restore callee-save regs on return */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define regs_return_value(regs) ((regs)->regs[0])
|
|
#define instruction_pointer(regs) ((regs)->pc)
|
|
#define profile_pc(regs) instruction_pointer(regs)
|
|
#define user_stack_pointer(regs) ((regs)->sp)
|
|
|
|
/* Does the process account for user or for system time? */
|
|
#define user_mode(regs) (EX1_PL((regs)->ex1) < KERNEL_PL)
|
|
|
|
/* Fill in a struct pt_regs with the current kernel registers. */
|
|
struct pt_regs *get_pt_regs(struct pt_regs *);
|
|
|
|
/* Trace the current syscall. */
|
|
extern int do_syscall_trace_enter(struct pt_regs *regs);
|
|
extern void do_syscall_trace_exit(struct pt_regs *regs);
|
|
|
|
#define arch_has_single_step() (1)
|
|
|
|
/*
|
|
* A structure for all single-stepper state.
|
|
*
|
|
* Also update defines in assembler section if it changes
|
|
*/
|
|
struct single_step_state {
|
|
/* the page to which we will write hacked-up bundles */
|
|
void __user *buffer;
|
|
|
|
union {
|
|
int flags;
|
|
struct {
|
|
unsigned long is_enabled:1, update:1, update_reg:6;
|
|
};
|
|
};
|
|
|
|
unsigned long orig_pc; /* the original PC */
|
|
unsigned long next_pc; /* return PC if no branch (PC + 1) */
|
|
unsigned long branch_next_pc; /* return PC if we did branch/jump */
|
|
unsigned long update_value; /* value to restore to update_target */
|
|
};
|
|
|
|
/* Single-step the instruction at regs->pc */
|
|
extern void single_step_once(struct pt_regs *regs);
|
|
|
|
/* Clean up after execve(). */
|
|
extern void single_step_execve(void);
|
|
|
|
struct task_struct;
|
|
|
|
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs);
|
|
|
|
#ifdef __tilegx__
|
|
/* We need this since sigval_t has a user pointer in it, for GETSIGINFO etc. */
|
|
#define __ARCH_WANT_COMPAT_SYS_PTRACE
|
|
#endif
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#define SINGLESTEP_STATE_MASK_IS_ENABLED 0x1
|
|
#define SINGLESTEP_STATE_MASK_UPDATE 0x2
|
|
#define SINGLESTEP_STATE_TARGET_LB 2
|
|
#define SINGLESTEP_STATE_TARGET_UB 7
|
|
|
|
#endif /* _ASM_TILE_PTRACE_H */
|