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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
#ifndef _ASM_PTRACE_H
#define _ASM_PTRACE_H
/* 0 - 31 are integer registers, 32 - 63 are fp registers. */
#define FPR_BASE 32
#define PC 64
#define CAUSE 65
#define BADVADDR 66
#define MMHI 67
#define MMLO 68
#define FPC_CSR 69
#define FPC_EIR 70
#define DSP_BASE 71 /* 3 more hi / lo register pairs */
#define DSP_CONTROL 77
#define ACX 78
/*
* This struct defines the way the registers are stored on the stack during a
* system call/exception. As usual the registers k0/k1 aren't being saved.
*/
struct pt_regs {
#ifdef CONFIG_32BIT
/* Pad bytes for argument save space on the stack. */
unsigned long pad0[6];
#endif
/* Saved main processor registers. */
unsigned long regs[32];
/* Saved special registers. */
unsigned long cp0_status;
unsigned long hi;
unsigned long lo;
#ifdef CONFIG_CPU_HAS_SMARTMIPS
unsigned long acx;
#endif
unsigned long cp0_badvaddr;
unsigned long cp0_cause;
unsigned long cp0_epc;
#ifdef CONFIG_MIPS_MT_SMTC
unsigned long cp0_tcstatus;
#endif /* CONFIG_MIPS_MT_SMTC */
#ifdef CONFIG_CPU_CAVIUM_OCTEON
unsigned long long mpl[3]; /* MTM{0,1,2} */
unsigned long long mtp[3]; /* MTP{0,1,2} */
#endif
} __attribute__ ((aligned (8)));
/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
#define PTRACE_GETREGS 12
#define PTRACE_SETREGS 13
#define PTRACE_GETFPREGS 14
#define PTRACE_SETFPREGS 15
/* #define PTRACE_GETFPXREGS 18 */
/* #define PTRACE_SETFPXREGS 19 */
#define PTRACE_OLDSETOPTIONS 21
#define PTRACE_GET_THREAD_AREA 25
#define PTRACE_SET_THREAD_AREA 26
/* Calls to trace a 64bit program from a 32bit program. */
#define PTRACE_PEEKTEXT_3264 0xc0
#define PTRACE_PEEKDATA_3264 0xc1
#define PTRACE_POKETEXT_3264 0xc2
#define PTRACE_POKEDATA_3264 0xc3
#define PTRACE_GET_THREAD_AREA_3264 0xc4
/* Read and write watchpoint registers. */
enum pt_watch_style {
pt_watch_style_mips32,
pt_watch_style_mips64
};
struct mips32_watch_regs {
unsigned int watchlo[8];
/* Lower 16 bits of watchhi. */
unsigned short watchhi[8];
/* Valid mask and I R W bits.
* bit 0 -- 1 if W bit is usable.
* bit 1 -- 1 if R bit is usable.
* bit 2 -- 1 if I bit is usable.
* bits 3 - 11 -- Valid watchhi mask bits.
*/
unsigned short watch_masks[8];
/* The number of valid watch register pairs. */
unsigned int num_valid;
} __attribute__((aligned(8)));
struct mips64_watch_regs {
unsigned long long watchlo[8];
unsigned short watchhi[8];
unsigned short watch_masks[8];
unsigned int num_valid;
} __attribute__((aligned(8)));
struct pt_watch_regs {
enum pt_watch_style style;
union {
struct mips32_watch_regs mips32;
struct mips64_watch_regs mips64;
};
};
#define PTRACE_GET_WATCH_REGS 0xd0
#define PTRACE_SET_WATCH_REGS 0xd1
#ifdef __KERNEL__
#include <linux/compiler.h>
#include <linux/linkage.h>
#include <linux/types.h>
#include <asm/isadep.h>
struct task_struct;
extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
extern int ptrace_setregs(struct task_struct *child, __s64 __user *data);
extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
extern int ptrace_get_watch_regs(struct task_struct *child,
struct pt_watch_regs __user *addr);
extern int ptrace_set_watch_regs(struct task_struct *child,
struct pt_watch_regs __user *addr);
/*
* Does the process account for user or for system time?
*/
#define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
static inline int is_syscall_success(struct pt_regs *regs)
{
return !regs->regs[7];
}
static inline long regs_return_value(struct pt_regs *regs)
{
if (is_syscall_success(regs))
return regs->regs[2];
else
return -regs->regs[2];
}
#define instruction_pointer(regs) ((regs)->cp0_epc)
#define profile_pc(regs) instruction_pointer(regs)
extern asmlinkage void syscall_trace_enter(struct pt_regs *regs);
extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
extern void die(const char *, struct pt_regs *) __noreturn;
static inline void die_if_kernel(const char *str, struct pt_regs *regs)
{
if (unlikely(!user_mode(regs)))
die(str, regs);
}
#endif
#endif /* _ASM_PTRACE_H */
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