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/*
* 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 <arch/chip.h>
#include <arch/abi.h>
/* These must match struct pt_regs, below. */
#if CHIP_WORD_SIZE() == 32
#define PTREGS_OFFSET_REG(n) ((n)*4)
#else
#define PTREGS_OFFSET_REG(n) ((n)*8)
#endif
#define PTREGS_OFFSET_BASE 0
#define PTREGS_OFFSET_TP PTREGS_OFFSET_REG(53)
#define PTREGS_OFFSET_SP PTREGS_OFFSET_REG(54)
#define PTREGS_OFFSET_LR PTREGS_OFFSET_REG(55)
#define PTREGS_NR_GPRS 56
#define PTREGS_OFFSET_PC PTREGS_OFFSET_REG(56)
#define PTREGS_OFFSET_EX1 PTREGS_OFFSET_REG(57)
#define PTREGS_OFFSET_FAULTNUM PTREGS_OFFSET_REG(58)
#define PTREGS_OFFSET_ORIG_R0 PTREGS_OFFSET_REG(59)
#define PTREGS_OFFSET_FLAGS PTREGS_OFFSET_REG(60)
#if CHIP_HAS_CMPEXCH()
#define PTREGS_OFFSET_CMPEXCH PTREGS_OFFSET_REG(61)
#endif
#define PTREGS_SIZE PTREGS_OFFSET_REG(64)
#ifndef __ASSEMBLY__
#ifdef __KERNEL__
/* Benefit from consistent use of "long" on all chips. */
typedef unsigned long pt_reg_t;
#else
/* Provide appropriate length type to userspace regardless of -m32/-m64. */
typedef uint_reg_t pt_reg_t;
#endif
/*
* This struct defines the way the registers are stored on the stack during a
* system call/exception. It should be a multiple of 8 bytes to preserve
* normal stack alignment rules.
*
* Must track <sys/ucontext.h> and <sys/procfs.h>
*/
struct pt_regs {
/* Saved main processor registers; 56..63 are special. */
/* tp, sp, and lr must immediately follow regs[] for aliasing. */
pt_reg_t regs[53];
pt_reg_t tp; /* aliases regs[TREG_TP] */
pt_reg_t sp; /* aliases regs[TREG_SP] */
pt_reg_t lr; /* aliases regs[TREG_LR] */
/* Saved special registers. */
pt_reg_t pc; /* stored in EX_CONTEXT_1_0 */
pt_reg_t ex1; /* stored in EX_CONTEXT_1_1 (PL and ICS bit) */
pt_reg_t faultnum; /* fault number (INT_SWINT_1 for syscall) */
pt_reg_t orig_r0; /* r0 at syscall entry, else zero */
pt_reg_t flags; /* flags (see below) */
#if !CHIP_HAS_CMPEXCH()
pt_reg_t pad[3];
#else
pt_reg_t cmpexch; /* value of CMPEXCH_VALUE SPR at interrupt */
pt_reg_t pad[2];
#endif
};
#endif /* __ASSEMBLY__ */
/* 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 */
#define PTRACE_GETREGS 12
#define PTRACE_SETREGS 13
#define PTRACE_GETFPREGS 14
#define PTRACE_SETFPREGS 15
/* Support TILE-specific ptrace options, with events starting at 16. */
#define PTRACE_O_TRACEMIGRATE 0x00010000
#define PTRACE_EVENT_MIGRATE 16
#ifdef __KERNEL__
#define PTRACE_O_MASK_TILE (PTRACE_O_TRACEMIGRATE)
#define PT_TRACE_MIGRATE 0x00080000
#define PT_TRACE_MASK_TILE (PT_TRACE_MIGRATE)
#endif
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
/* Does the process account for user or for system time? */
#define user_mode(regs) (EX1_PL((regs)->ex1) == USER_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 void do_syscall_trace(void);
extern void show_regs(struct pt_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);
struct task_struct;
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
int error_code);
#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 /* !__KERNEL__ */
#endif /* _ASM_TILE_PTRACE_H */
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