Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * Amit Bhor, Sameer Dhavale: Codito Technologies 2004 |
| 9 | */ |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 10 | #ifndef __ASM_ARC_PTRACE_H |
| 11 | #define __ASM_ARC_PTRACE_H |
| 12 | |
Vineet Gupta | 8c2f4a8 | 2013-02-11 19:55:33 +0530 | [diff] [blame] | 13 | #include <uapi/asm/ptrace.h> |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 14 | |
| 15 | #ifndef __ASSEMBLY__ |
| 16 | |
| 17 | /* THE pt_regs: Defines how regs are saved during entry into kernel */ |
| 18 | |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 19 | #ifdef CONFIG_ISA_ARCOMPACT |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 20 | struct pt_regs { |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 21 | |
| 22 | /* Real registers */ |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 23 | unsigned long bta; /* bta_l1, bta_l2, erbta */ |
Vineet Gupta | 4b06ff3 | 2013-07-10 11:40:27 +0530 | [diff] [blame] | 24 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 25 | unsigned long lp_start, lp_end, lp_count; |
Vineet Gupta | 4b06ff3 | 2013-07-10 11:40:27 +0530 | [diff] [blame] | 26 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 27 | unsigned long status32; /* status32_l1, status32_l2, erstatus */ |
| 28 | unsigned long ret; /* ilink1, ilink2 or eret */ |
| 29 | unsigned long blink; |
| 30 | unsigned long fp; |
| 31 | unsigned long r26; /* gp */ |
Vineet Gupta | 4b06ff3 | 2013-07-10 11:40:27 +0530 | [diff] [blame] | 32 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 33 | unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0; |
Vineet Gupta | 4b06ff3 | 2013-07-10 11:40:27 +0530 | [diff] [blame] | 34 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 35 | unsigned long sp; /* User/Kernel depending on where we came from */ |
| 36 | unsigned long orig_r0; |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame] | 37 | |
Vineet Gupta | 502a0c7 | 2013-06-11 18:56:54 +0530 | [diff] [blame] | 38 | /* |
| 39 | * To distinguish bet excp, syscall, irq |
| 40 | * For traps and exceptions, Exception Cause Register. |
| 41 | * ECR: <00> <VV> <CC> <PP> |
| 42 | * Last word used by Linux for extra state mgmt (syscall-restart) |
| 43 | * For interrupts, use artificial ECR values to note current prio-level |
| 44 | */ |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame] | 45 | union { |
Vineet Gupta | 502a0c7 | 2013-06-11 18:56:54 +0530 | [diff] [blame] | 46 | struct { |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame] | 47 | #ifdef CONFIG_CPU_BIG_ENDIAN |
Vineet Gupta | 502a0c7 | 2013-06-11 18:56:54 +0530 | [diff] [blame] | 48 | unsigned long state:8, ecr_vec:8, |
| 49 | ecr_cause:8, ecr_param:8; |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame] | 50 | #else |
Vineet Gupta | 502a0c7 | 2013-06-11 18:56:54 +0530 | [diff] [blame] | 51 | unsigned long ecr_param:8, ecr_cause:8, |
| 52 | ecr_vec:8, state:8; |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame] | 53 | #endif |
Vineet Gupta | 502a0c7 | 2013-06-11 18:56:54 +0530 | [diff] [blame] | 54 | }; |
| 55 | unsigned long event; |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame] | 56 | }; |
Vineet Gupta | 359105b | 2013-05-28 13:50:41 +0530 | [diff] [blame] | 57 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 58 | unsigned long user_r25; |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 59 | }; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 60 | #else |
| 61 | |
| 62 | struct pt_regs { |
| 63 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 64 | unsigned long orig_r0; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 65 | |
| 66 | union { |
| 67 | struct { |
| 68 | #ifdef CONFIG_CPU_BIG_ENDIAN |
| 69 | unsigned long state:8, ecr_vec:8, |
| 70 | ecr_cause:8, ecr_param:8; |
| 71 | #else |
| 72 | unsigned long ecr_param:8, ecr_cause:8, |
| 73 | ecr_vec:8, state:8; |
| 74 | #endif |
| 75 | }; |
| 76 | unsigned long event; |
| 77 | }; |
| 78 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 79 | unsigned long bta; /* bta_l1, bta_l2, erbta */ |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 80 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 81 | unsigned long user_r25; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 82 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 83 | unsigned long r26; /* gp */ |
| 84 | unsigned long fp; |
| 85 | unsigned long sp; /* user/kernel sp depending on where we came from */ |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 86 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 87 | unsigned long r12; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 88 | |
| 89 | /*------- Below list auto saved by h/w -----------*/ |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 90 | unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 91 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 92 | unsigned long blink; |
| 93 | unsigned long lp_end, lp_start, lp_count; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 94 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 95 | unsigned long ei, ldi, jli; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 96 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 97 | unsigned long ret; |
| 98 | unsigned long status32; |
Vineet Gupta | 1f6ccff | 2013-05-13 18:30:41 +0530 | [diff] [blame] | 99 | }; |
| 100 | |
| 101 | #endif |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 102 | |
| 103 | /* Callee saved registers - need to be saved only when you are scheduled out */ |
| 104 | |
| 105 | struct callee_regs { |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 106 | unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 107 | }; |
| 108 | |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 109 | #define instruction_pointer(regs) ((regs)->ret) |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 110 | #define profile_pc(regs) instruction_pointer(regs) |
| 111 | |
| 112 | /* return 1 if user mode or 0 if kernel mode */ |
| 113 | #define user_mode(regs) (regs->status32 & STATUS_U_MASK) |
| 114 | |
| 115 | #define user_stack_pointer(regs)\ |
| 116 | ({ unsigned int sp; \ |
| 117 | if (user_mode(regs)) \ |
| 118 | sp = (regs)->sp;\ |
| 119 | else \ |
| 120 | sp = -1; \ |
| 121 | sp; \ |
| 122 | }) |
Vineet Gupta | 4adeefe | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 123 | |
Vineet Gupta | 2e651ea | 2013-01-23 16:30:36 +0530 | [diff] [blame] | 124 | /* return 1 if PC in delay slot */ |
| 125 | #define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK) |
| 126 | |
Vineet Gupta | 502a0c7 | 2013-06-11 18:56:54 +0530 | [diff] [blame] | 127 | #define in_syscall(regs) ((regs->ecr_vec == ECR_V_TRAP) && !regs->ecr_param) |
| 128 | #define in_brkpt_trap(regs) ((regs->ecr_vec == ECR_V_TRAP) && regs->ecr_param) |
Vineet Gupta | 4adeefe | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 129 | |
Vineet Gupta | 502a0c7 | 2013-06-11 18:56:54 +0530 | [diff] [blame] | 130 | #define STATE_SCALL_RESTARTED 0x01 |
| 131 | |
| 132 | #define syscall_wont_restart(reg) (reg->state |= STATE_SCALL_RESTARTED) |
| 133 | #define syscall_restartable(reg) !(reg->state & STATE_SCALL_RESTARTED) |
Vineet Gupta | 55bb948 | 2013-01-18 15:12:19 +0530 | [diff] [blame] | 134 | |
Vineet Gupta | bf90e1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 135 | #define current_pt_regs() \ |
| 136 | ({ \ |
| 137 | /* open-coded current_thread_info() */ \ |
| 138 | register unsigned long sp asm ("sp"); \ |
| 139 | unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \ |
Vineet Gupta | 283237a | 2013-05-28 09:34:45 +0530 | [diff] [blame] | 140 | (struct pt_regs *)(pg_start + THREAD_SIZE) - 1; \ |
Vineet Gupta | bf90e1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 141 | }) |
| 142 | |
Vineet Gupta | 4d86dfb | 2013-01-22 17:03:59 +0530 | [diff] [blame] | 143 | static inline long regs_return_value(struct pt_regs *regs) |
| 144 | { |
Vineet Gupta | 87ce628 | 2015-08-05 11:12:00 +0530 | [diff] [blame] | 145 | return (long)regs->r0; |
Vineet Gupta | 4d86dfb | 2013-01-22 17:03:59 +0530 | [diff] [blame] | 146 | } |
| 147 | |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 148 | #endif /* !__ASSEMBLY__ */ |
| 149 | |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 150 | #endif /* __ASM_PTRACE_H */ |