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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 instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->usp)
#define profile_pc(regs) instruction_pointer(regs)
extern void show_regs(struct pt_regs *);
#define arch_has_single_step() (1)
extern void user_enable_single_step(struct task_struct *child);
extern void user_disable_single_step(struct task_struct *child);
/* 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)))
#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 */
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