Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef __ASM_ARC_PTRACE_H
#define __ASM_ARC_PTRACE_H
#include <uapi/asm/ptrace.h>
#ifndef __ASSEMBLY__
/* THE pt_regs: Defines how regs are saved during entry into kernel */
#ifdef CONFIG_ISA_ARCOMPACT
struct pt_regs {
/* Real registers */
unsigned long bta; /* bta_l1, bta_l2, erbta */
unsigned long lp_start, lp_end, lp_count;
unsigned long status32; /* status32_l1, status32_l2, erstatus */
unsigned long ret; /* ilink1, ilink2 or eret */
unsigned long blink;
unsigned long fp;
unsigned long r26; /* gp */
unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
unsigned long sp; /* User/Kernel depending on where we came from */
unsigned long orig_r0;
/*
* To distinguish bet excp, syscall, irq
* For traps and exceptions, Exception Cause Register.
* ECR: <00> <VV> <CC> <PP>
* Last word used by Linux for extra state mgmt (syscall-restart)
* For interrupts, use artificial ECR values to note current prio-level
*/
union {
struct {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned long state:8, ecr_vec:8,
ecr_cause:8, ecr_param:8;
#else
unsigned long ecr_param:8, ecr_cause:8,
ecr_vec:8, state:8;
#endif
};
unsigned long event;
};
unsigned long user_r25;
};
#else
struct pt_regs {
unsigned long orig_r0;
union {
struct {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned long state:8, ecr_vec:8,
ecr_cause:8, ecr_param:8;
#else
unsigned long ecr_param:8, ecr_cause:8,
ecr_vec:8, state:8;
#endif
};
unsigned long event;
};
unsigned long bta; /* bta_l1, bta_l2, erbta */
unsigned long user_r25;
unsigned long r26; /* gp */
unsigned long fp;
unsigned long sp; /* user/kernel sp depending on where we came from */
unsigned long r12;
/*------- Below list auto saved by h/w -----------*/
unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;
unsigned long blink;
unsigned long lp_end, lp_start, lp_count;
unsigned long ei, ldi, jli;
unsigned long ret;
unsigned long status32;
};
#endif
/* Callee saved registers - need to be saved only when you are scheduled out */
struct callee_regs {
unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13;
};
#define instruction_pointer(regs) ((regs)->ret)
#define profile_pc(regs) instruction_pointer(regs)
/* return 1 if user mode or 0 if kernel mode */
#define user_mode(regs) (regs->status32 & STATUS_U_MASK)
#define user_stack_pointer(regs)\
({ unsigned int sp; \
if (user_mode(regs)) \
sp = (regs)->sp;\
else \
sp = -1; \
sp; \
})
/* return 1 if PC in delay slot */
#define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK)
#define in_syscall(regs) ((regs->ecr_vec == ECR_V_TRAP) && !regs->ecr_param)
#define in_brkpt_trap(regs) ((regs->ecr_vec == ECR_V_TRAP) && regs->ecr_param)
#define STATE_SCALL_RESTARTED 0x01
#define syscall_wont_restart(reg) (reg->state |= STATE_SCALL_RESTARTED)
#define syscall_restartable(reg) !(reg->state & STATE_SCALL_RESTARTED)
#define current_pt_regs() \
({ \
/* open-coded current_thread_info() */ \
register unsigned long sp asm ("sp"); \
unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \
(struct pt_regs *)(pg_start + THREAD_SIZE) - 1; \
})
static inline long regs_return_value(struct pt_regs *regs)
{
return (long)regs->r0;
}
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_PTRACE_H */
|