| 1 | /* |
| 2 | * arch/ubicom32/include/asm/ptrace.h |
| 3 | * Ubicom32 architecture ptrace support. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | #ifndef _ASM_UBICOM32_PTRACE_H |
| 29 | #define _ASM_UBICOM32_PTRACE_H |
| 30 | |
| 31 | #ifndef __ASSEMBLY__ |
| 32 | |
| 33 | /* |
| 34 | * We use hard coded constants because this is shared with user |
| 35 | * space and the values are NOT allowed to change. Only fields |
| 36 | * that are intended to be exposed get values. |
| 37 | */ |
| 38 | #define PT_D0 0 |
| 39 | #define PT_D1 4 |
| 40 | #define PT_D2 8 |
| 41 | #define PT_D3 12 |
| 42 | #define PT_D4 16 |
| 43 | #define PT_D5 20 |
| 44 | #define PT_D6 24 |
| 45 | #define PT_D7 28 |
| 46 | #define PT_D8 32 |
| 47 | #define PT_D9 36 |
| 48 | #define PT_D10 40 |
| 49 | #define PT_D11 44 |
| 50 | #define PT_D12 48 |
| 51 | #define PT_D13 52 |
| 52 | #define PT_D14 56 |
| 53 | #define PT_D15 60 |
| 54 | #define PT_A0 64 |
| 55 | #define PT_A1 68 |
| 56 | #define PT_A2 72 |
| 57 | #define PT_A3 76 |
| 58 | #define PT_A4 80 |
| 59 | #define PT_A5 84 |
| 60 | #define PT_A6 88 |
| 61 | #define PT_A7 92 |
| 62 | #define PT_SP 92 |
| 63 | #define PT_ACC0HI 96 |
| 64 | #define PT_ACC0LO 100 |
| 65 | #define PT_MAC_RC16 104 |
| 66 | #define PT_ACC1HI 108 |
| 67 | #define PT_ACC1LO 112 |
| 68 | #define PT_SOURCE3 116 |
| 69 | #define PT_INST_CNT 120 |
| 70 | #define PT_CSR 124 |
| 71 | #define PT_DUMMY_UNUSED 128 |
| 72 | #define PT_INT_MASK0 132 |
| 73 | #define PT_INT_MASK1 136 |
| 74 | #define PT_TRAP_CAUSE 140 |
| 75 | #define PT_PC 144 |
| 76 | #define PT_ORIGINAL_D0 148 |
| 77 | #define PT_FRAME_TYPE 152 |
| 78 | |
| 79 | /* |
| 80 | * The following 'registers' are not registers at all but are used |
| 81 | * locate the relocated sections. |
| 82 | */ |
| 83 | #define PT_TEXT_ADDR 200 |
| 84 | #define PT_TEXT_END_ADDR 204 |
| 85 | #define PT_DATA_ADDR 208 |
| 86 | #define PT_EXEC_FDPIC_LOADMAP 212 |
| 87 | #define PT_INTERP_FDPIC_LOADMAP 216 |
| 88 | |
| 89 | /* |
| 90 | * This struct defines the way the registers are stored on the |
| 91 | * stack during a system call. |
| 92 | */ |
| 93 | enum thread_type { |
| 94 | NORMAL_THREAD, |
| 95 | KERNEL_THREAD, |
| 96 | }; |
| 97 | |
| 98 | #define UBICOM32_FRAME_TYPE_SYSCALL -1 /* System call frame */ |
| 99 | #define UBICOM32_FRAME_TYPE_INVALID 0 /* Invalid frame, no longer in use */ |
| 100 | #define UBICOM32_FRAME_TYPE_INTERRUPT 1 /* Interrupt frame */ |
| 101 | #define UBICOM32_FRAME_TYPE_TRAP 2 /* Trap frame */ |
| 102 | #define UBICOM32_FRAME_TYPE_SIGTRAMP 3 /* Signal trampoline frame. */ |
| 103 | #define UBICOM32_FRAME_TYPE_NEW_THREAD 4 /* New Thread. */ |
| 104 | |
| 105 | struct pt_regs { |
| 106 | /* |
| 107 | * Data Registers |
| 108 | */ |
| 109 | unsigned long dn[16]; |
| 110 | |
| 111 | /* |
| 112 | * Address Registers |
| 113 | */ |
| 114 | unsigned long an[8]; |
| 115 | |
| 116 | /* |
| 117 | * Per thread misc registers. |
| 118 | */ |
| 119 | unsigned long acc0[2]; |
| 120 | unsigned long mac_rc16; |
| 121 | unsigned long acc1[2]; |
| 122 | unsigned long source3; |
| 123 | unsigned long inst_cnt; |
| 124 | unsigned long csr; |
| 125 | unsigned long dummy_unused; |
| 126 | unsigned long int_mask0; |
| 127 | unsigned long int_mask1; |
| 128 | unsigned long trap_cause; |
| 129 | unsigned long pc; |
| 130 | unsigned long original_dn_0; |
| 131 | |
| 132 | /* |
| 133 | * Frame type. Syscall frames are -1. For other types look above. |
| 134 | */ |
| 135 | unsigned long frame_type; |
| 136 | |
| 137 | /* |
| 138 | * These fields are not exposed to ptrace. |
| 139 | */ |
| 140 | unsigned long previous_pc; |
| 141 | long nesting_level; /* When the kernel in in user space this |
| 142 | * will be -1. */ |
| 143 | unsigned long thread_type; /* This indicates if this is a kernel |
| 144 | * thread. */ |
| 145 | }; |
| 146 | |
| 147 | /* |
| 148 | * This is the extended stack used by signal handlers and the context |
| 149 | * switcher: it's pushed after the normal "struct pt_regs". |
| 150 | */ |
| 151 | struct switch_stack { |
| 152 | unsigned long dummy; |
| 153 | }; |
| 154 | |
| 155 | #ifdef __KERNEL__ |
| 156 | |
| 157 | /* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */ |
| 158 | #define PTRACE_GETREGS 12 |
| 159 | #define PTRACE_SETREGS 13 |
| 160 | |
| 161 | #ifndef PS_S |
| 162 | #define PS_S (0x2000) |
| 163 | #define PS_M (0x1000) |
| 164 | #endif |
| 165 | |
| 166 | extern int __user_mode(unsigned long sp); |
| 167 | |
| 168 | #define user_mode(regs) (__user_mode((regs->an[7]))) |
| 169 | #define user_stack(regs) ((regs)->an[7]) |
| 170 | #define instruction_pointer(regs) ((regs)->pc) |
| 171 | #define profile_pc(regs) instruction_pointer(regs) |
| 172 | extern void show_regs(struct pt_regs *); |
| 173 | #endif /* __KERNEL__ */ |
| 174 | |
| 175 | #endif /* __ASSEMBLY__ */ |
| 176 | |
| 177 | #endif /* _ASM_UBICOM32_PTRACE_H */ |
| 178 | |
