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 | */ |
| 10 | |
| 11 | #ifndef __ASM_ARC_PTRACE_H |
| 12 | #define __ASM_ARC_PTRACE_H |
| 13 | |
| 14 | #ifdef __KERNEL__ |
| 15 | |
| 16 | #ifndef __ASSEMBLY__ |
| 17 | |
| 18 | /* THE pt_regs: Defines how regs are saved during entry into kernel */ |
| 19 | |
| 20 | struct pt_regs { |
| 21 | /* |
| 22 | * 1 word gutter after reg-file has been saved |
| 23 | * Technically not needed, Since SP always points to a "full" location |
| 24 | * (vs. "empty"). But pt_regs is shared with tools.... |
| 25 | */ |
| 26 | long res; |
| 27 | |
| 28 | /* Real registers */ |
| 29 | long bta; /* bta_l1, bta_l2, erbta */ |
| 30 | long lp_start; |
| 31 | long lp_end; |
| 32 | long lp_count; |
| 33 | long status32; /* status32_l1, status32_l2, erstatus */ |
| 34 | long ret; /* ilink1, ilink2 or eret */ |
| 35 | long blink; |
| 36 | long fp; |
| 37 | long r26; /* gp */ |
| 38 | long r12; |
| 39 | long r11; |
| 40 | long r10; |
| 41 | long r9; |
| 42 | long r8; |
| 43 | long r7; |
| 44 | long r6; |
| 45 | long r5; |
| 46 | long r4; |
| 47 | long r3; |
| 48 | long r2; |
| 49 | long r1; |
| 50 | long r0; |
| 51 | long sp; /* user/kernel sp depending on where we came from */ |
| 52 | long orig_r0; |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame^] | 53 | |
| 54 | /*to distinguish bet excp, syscall, irq */ |
| 55 | union { |
| 56 | #ifdef CONFIG_CPU_BIG_ENDIAN |
| 57 | /* so that assembly code is same for LE/BE */ |
| 58 | unsigned long orig_r8:16, event:16; |
| 59 | #else |
| 60 | unsigned long event:16, orig_r8:16; |
| 61 | #endif |
| 62 | long orig_r8_word; |
| 63 | }; |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 64 | }; |
| 65 | |
| 66 | /* Callee saved registers - need to be saved only when you are scheduled out */ |
| 67 | |
| 68 | struct callee_regs { |
| 69 | long res; /* Again this is not needed */ |
| 70 | long r25; |
| 71 | long r24; |
| 72 | long r23; |
| 73 | long r22; |
| 74 | long r21; |
| 75 | long r20; |
| 76 | long r19; |
| 77 | long r18; |
| 78 | long r17; |
| 79 | long r16; |
| 80 | long r15; |
| 81 | long r14; |
| 82 | long r13; |
| 83 | }; |
| 84 | |
| 85 | #define instruction_pointer(regs) ((regs)->ret) |
| 86 | #define profile_pc(regs) instruction_pointer(regs) |
| 87 | |
| 88 | /* return 1 if user mode or 0 if kernel mode */ |
| 89 | #define user_mode(regs) (regs->status32 & STATUS_U_MASK) |
| 90 | |
| 91 | #define user_stack_pointer(regs)\ |
| 92 | ({ unsigned int sp; \ |
| 93 | if (user_mode(regs)) \ |
| 94 | sp = (regs)->sp;\ |
| 95 | else \ |
| 96 | sp = -1; \ |
| 97 | sp; \ |
| 98 | }) |
Vineet Gupta | 4adeefe | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 99 | |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame^] | 100 | #define in_syscall(regs) (regs->event & orig_r8_IS_SCALL) |
| 101 | #define in_brkpt_trap(regs) (regs->event & orig_r8_IS_BRKPT) |
Vineet Gupta | 4adeefe | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 102 | |
Vineet Gupta | bf90e1e | 2013-01-18 15:12:18 +0530 | [diff] [blame] | 103 | #define current_pt_regs() \ |
| 104 | ({ \ |
| 105 | /* open-coded current_thread_info() */ \ |
| 106 | register unsigned long sp asm ("sp"); \ |
| 107 | unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \ |
| 108 | (struct pt_regs *)(pg_start + THREAD_SIZE - 4) - 1; \ |
| 109 | }) |
| 110 | |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 111 | #endif /* !__ASSEMBLY__ */ |
| 112 | |
Vineet Gupta | 5c39c0a | 2013-02-11 20:01:24 +0530 | [diff] [blame^] | 113 | #define orig_r8_IS_SCALL 0x0001 |
| 114 | #define orig_r8_IS_SCALL_RESTARTED 0x0002 |
| 115 | #define orig_r8_IS_BRKPT 0x0004 |
| 116 | #define orig_r8_IS_EXCPN 0x0004 |
| 117 | #define orig_r8_IS_IRQ1 0x0010 |
| 118 | #define orig_r8_IS_IRQ2 0x0020 |
| 119 | |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 120 | #endif /* __KERNEL__ */ |
| 121 | |
| 122 | #ifndef __ASSEMBLY__ |
| 123 | /* |
| 124 | * Userspace ABI: Register state needed by |
| 125 | * -ptrace (gdbserver) |
| 126 | * -sigcontext (SA_SIGNINFO signal frame) |
| 127 | * |
| 128 | * This is to decouple pt_regs from user-space ABI, to be able to change it |
| 129 | * w/o affecting the ABI. |
| 130 | * Although the layout (initial padding) is similar to pt_regs to have some |
| 131 | * optimizations when copying pt_regs to/from user_regs_struct. |
| 132 | * |
| 133 | * Also, sigcontext only care about the scratch regs as that is what we really |
| 134 | * save/restore for signal handling. |
| 135 | */ |
| 136 | struct user_regs_struct { |
| 137 | |
| 138 | struct scratch { |
| 139 | long pad; |
| 140 | long bta, lp_start, lp_end, lp_count; |
| 141 | long status32, ret, blink, fp, gp; |
| 142 | long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0; |
| 143 | long sp; |
| 144 | } scratch; |
| 145 | struct callee { |
| 146 | long pad; |
| 147 | long r25, r24, r23, r22, r21, r20; |
| 148 | long r19, r18, r17, r16, r15, r14, r13; |
| 149 | } callee; |
| 150 | long efa; /* break pt addr, for break points in delay slots */ |
| 151 | long stop_pc; /* give dbg stop_pc directly after checking orig_r8 */ |
| 152 | }; |
| 153 | #endif /* !__ASSEMBLY__ */ |
| 154 | |
| 155 | #endif /* __ASM_PTRACE_H */ |