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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * Amit Bhor, Sameer Dhavale: Codito Technologies 2004 */ #ifndef __ASM_ARC_PTRACE_H #define __ASM_ARC_PTRACE_H #include <uapi/asm/ptrace.h> #include <linux/compiler.h> #ifndef __ASSEMBLY__ typedef union { struct { #ifdef CONFIG_CPU_BIG_ENDIAN unsigned long state:8, vec:8, cause:8, param:8; #else unsigned long param:8, cause:8, vec:8, state:8; #endif }; unsigned long full; } ecr_reg; /* 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 */ ecr_reg ecr; }; struct callee_regs { unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; }; #define MAX_REG_OFFSET offsetof(struct pt_regs, ecr) #else struct pt_regs { unsigned long orig_r0; ecr_reg ecr; /* Exception Cause Reg */ unsigned long bta; /* erbta */ unsigned long fp; unsigned long r30; unsigned long r12; unsigned long r26; /* gp */ #ifdef CONFIG_ARC_HAS_ACCL_REGS unsigned long r58, r59; /* ACCL/ACCH used by FPU / DSP MPY */ #endif #ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS unsigned long DSP_CTRL; #endif unsigned long sp; /* user/kernel sp depending on entry */ /*------- 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; }; struct callee_regs { unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; }; #define MAX_REG_OFFSET offsetof(struct pt_regs, status32) #endif #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(regs) (regs->ecr.state |= STATE_SCALL_RESTARTED) #define syscall_restartable(regs) !(regs->ecr.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; } static inline void instruction_pointer_set(struct pt_regs *regs, unsigned long val) { instruction_pointer(regs) = val; } static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) { return regs->sp; } extern int regs_query_register_offset(const char *name); extern const char *regs_query_register_name(unsigned int offset); extern bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr); extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n); static inline unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset) { if (unlikely(offset > MAX_REG_OFFSET)) return 0; return *(unsigned long *)((unsigned long)regs + offset); } extern int syscall_trace_enter(struct pt_regs *); extern void syscall_trace_exit(struct pt_regs *); #endif /* !__ASSEMBLY__ */ #endif /* __ASM_PTRACE_H */ |