ptrace.h

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/*
 * Copyright 2004-2008 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef _BFIN_PTRACE_H
#define _BFIN_PTRACE_H

/*
 * GCC defines register number like this:
 * -----------------------------
 *       0 - 7 are data registers R0-R7
 *       8 - 15 are address registers P0-P7
 *      16 - 31 dsp registers I/B/L0 -- I/B/L3 & M0--M3
 *      32 - 33 A registers A0 & A1
 *      34 -    status register
 * -----------------------------
 *
 * We follows above, except:
 *      32-33 --- Low 32-bit of A0&1
 *      34-35 --- High 8-bit of A0&1
 */

#ifndef __ASSEMBLY__

struct task_struct;

/* this struct defines the way the registers are stored on the
   stack during a system call. */

struct pt_regs {
    long orig_pc;
    long ipend;
    long seqstat;
    long rete;
    long retn;
    long retx;
    long pc;        /* PC == RETI */
    long rets;
    long reserved;      /* Used as scratch during system calls */
    long astat;
    long lb1;
    long lb0;
    long lt1;
    long lt0;
    long lc1;
    long lc0;
    long a1w;
    long a1x;
    long a0w;
    long a0x;
    long b3;
    long b2;
    long b1;
    long b0;
    long l3;
    long l2;
    long l1;
    long l0;
    long m3;
    long m2;
    long m1;
    long m0;
    long i3;
    long i2;
    long i1;
    long i0;
    long usp;
    long fp;
    long p5;
    long p4;
    long p3;
    long p2;
    long p1;
    long p0;
    long r7;
    long r6;
    long r5;
    long r4;
    long r3;
    long r2;
    long r1;
    long r0;
    long orig_r0;
    long orig_p0;
    long syscfg;
};

/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
#define PTRACE_GETREGS            12
#define PTRACE_SETREGS            13    /* ptrace signal  */

#define PTRACE_GETFDPIC           31    /* get the ELF fdpic loadmap address */
#define PTRACE_GETFDPIC_EXEC       0    /* [addr] request the executable loadmap */
#define PTRACE_GETFDPIC_INTERP     1    /* [addr] request the interpreter loadmap */

#define PS_S  (0x0002)

#ifdef __KERNEL__

/* user_mode returns true if only one bit is set in IPEND, other than the
   master interrupt enable.  */
#define user_mode(regs) (!(((regs)->ipend & ~0x10) & (((regs)->ipend & ~0x10) - 1)))

#define arch_has_single_step()  (1)
/* common code demands this function */
#define ptrace_disable(child) user_disable_single_step(child)

extern int is_user_addr_valid(struct task_struct *child,
                  unsigned long start, unsigned long len);

/*
 * Get the address of the live pt_regs for the specified task.
 * These are saved onto the top kernel stack when the process
 * is not running.
 *
 * Note: if a user thread is execve'd from kernel space, the
 * kernel stack will not be empty on entry to the kernel, so
 * ptracing these tasks will fail.
 */
#define task_pt_regs(task) \
    (struct pt_regs *) \
        ((unsigned long)task_stack_page(task) + \
         (THREAD_SIZE - sizeof(struct pt_regs)))

#include <asm-generic/ptrace.h>

#endif  /*  __KERNEL__  */

#endif              /* __ASSEMBLY__ */

/*
 * Offsets used by 'ptrace' system call interface.
 */

#define PT_R0 204
#define PT_R1 200
#define PT_R2 196
#define PT_R3 192
#define PT_R4 188
#define PT_R5 184
#define PT_R6 180
#define PT_R7 176
#define PT_P0 172
#define PT_P1 168
#define PT_P2 164
#define PT_P3 160
#define PT_P4 156
#define PT_P5 152
#define PT_FP 148
#define PT_USP 144
#define PT_I0 140
#define PT_I1 136
#define PT_I2 132
#define PT_I3 128
#define PT_M0 124
#define PT_M1 120
#define PT_M2 116
#define PT_M3 112
#define PT_L0 108
#define PT_L1 104
#define PT_L2 100
#define PT_L3 96
#define PT_B0 92
#define PT_B1 88
#define PT_B2 84
#define PT_B3 80
#define PT_A0X 76
#define PT_A0W 72
#define PT_A1X 68
#define PT_A1W 64
#define PT_LC0 60
#define PT_LC1 56
#define PT_LT0 52
#define PT_LT1 48
#define PT_LB0 44
#define PT_LB1 40
#define PT_ASTAT 36
#define PT_RESERVED 32
#define PT_RETS 28
#define PT_PC 24
#define PT_RETX 20
#define PT_RETN 16
#define PT_RETE 12
#define PT_SEQSTAT 8
#define PT_IPEND 4

#define PT_ORIG_R0 208
#define PT_ORIG_P0 212
#define PT_SYSCFG 216
#define PT_TEXT_ADDR 220
#define PT_TEXT_END_ADDR 224
#define PT_DATA_ADDR 228
#define PT_FDPIC_EXEC 232
#define PT_FDPIC_INTERP 236

#define PT_LAST_PSEUDO PT_FDPIC_INTERP

#endif              /* _BFIN_PTRACE_H */