Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 1 | #ifndef _ASM_POWERPC_PTRACE_H |
| 2 | #define _ASM_POWERPC_PTRACE_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | |
| 4 | /* |
| 5 | * Copyright (C) 2001 PPC64 Team, IBM Corp |
| 6 | * |
| 7 | * This struct defines the way the registers are stored on the |
| 8 | * kernel stack during a system call or other kernel entry. |
| 9 | * |
| 10 | * this should only contain volatile regs |
| 11 | * since we can keep non-volatile in the thread_struct |
| 12 | * should set this up when only volatiles are saved |
| 13 | * by intr code. |
| 14 | * |
| 15 | * Since this is going on the stack, *CARE MUST BE TAKEN* to insure |
| 16 | * that the overall structure is a multiple of 16 bytes in length. |
| 17 | * |
| 18 | * Note that the offsets of the fields in this struct correspond with |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 19 | * the PT_* values below. This simplifies arch/powerpc/kernel/ptrace.c. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | * |
| 21 | * This program is free software; you can redistribute it and/or |
| 22 | * modify it under the terms of the GNU General Public License |
| 23 | * as published by the Free Software Foundation; either version |
| 24 | * 2 of the License, or (at your option) any later version. |
| 25 | */ |
| 26 | |
| 27 | #ifndef __ASSEMBLY__ |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | struct pt_regs { |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 30 | unsigned long gpr[32]; |
| 31 | unsigned long nip; |
| 32 | unsigned long msr; |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 33 | unsigned long orig_gpr3; /* Used for restarting system calls */ |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 34 | unsigned long ctr; |
| 35 | unsigned long link; |
| 36 | unsigned long xer; |
| 37 | unsigned long ccr; |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 38 | #ifdef __powerpc64__ |
| 39 | unsigned long softe; /* Soft enabled/disabled */ |
| 40 | #else |
| 41 | unsigned long mq; /* 601 only (not used at present) */ |
| 42 | /* Used on APUS to hold IPL value. */ |
| 43 | #endif |
| 44 | unsigned long trap; /* Reason for being here */ |
| 45 | /* N.B. for critical exceptions on 4xx, the dar and dsisr |
| 46 | fields are overloaded to hold srr0 and srr1. */ |
| 47 | unsigned long dar; /* Fault registers */ |
| 48 | unsigned long dsisr; /* on 4xx/Book-E used for ESR */ |
| 49 | unsigned long result; /* Result of a system call */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | }; |
| 51 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 52 | #endif /* __ASSEMBLY__ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 54 | #ifdef __KERNEL__ |
| 55 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 56 | #ifdef __powerpc64__ |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 57 | |
| 58 | #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */ |
Benjamin Herrenschmidt | ec2b36b | 2008-04-17 14:34:59 +1000 | [diff] [blame] | 59 | #define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */ |
| 60 | #define STACK_FRAME_REGS_MARKER ASM_CONST(0x7265677368657265) |
| 61 | #define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \ |
| 62 | STACK_FRAME_OVERHEAD + 288) |
| 63 | #define STACK_FRAME_MARKER 12 |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 64 | |
| 65 | /* Size of dummy stack frame allocated when calling signal handler. */ |
| 66 | #define __SIGNAL_FRAMESIZE 128 |
| 67 | #define __SIGNAL_FRAMESIZE32 64 |
| 68 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 69 | #else /* __powerpc64__ */ |
| 70 | |
| 71 | #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ |
Benjamin Herrenschmidt | ec2b36b | 2008-04-17 14:34:59 +1000 | [diff] [blame] | 72 | #define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */ |
| 73 | #define STACK_FRAME_REGS_MARKER ASM_CONST(0x72656773) |
| 74 | #define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD) |
| 75 | #define STACK_FRAME_MARKER 2 |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 76 | |
| 77 | /* Size of stack frame allocated when calling signal handler. */ |
| 78 | #define __SIGNAL_FRAMESIZE 64 |
| 79 | |
| 80 | #endif /* __powerpc64__ */ |
| 81 | |
| 82 | #ifndef __ASSEMBLY__ |
| 83 | |
| 84 | #define instruction_pointer(regs) ((regs)->nip) |
Roland McGrath | f1ba128 | 2008-07-27 16:51:35 +1000 | [diff] [blame] | 85 | #define user_stack_pointer(regs) ((regs)->gpr[1]) |
Ananth N Mavinakayanahalli | b3f827c | 2006-10-02 02:17:31 -0700 | [diff] [blame] | 86 | #define regs_return_value(regs) ((regs)->gpr[3]) |
| 87 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 88 | #ifdef CONFIG_SMP |
| 89 | extern unsigned long profile_pc(struct pt_regs *regs); |
| 90 | #else |
| 91 | #define profile_pc(regs) instruction_pointer(regs) |
| 92 | #endif |
| 93 | |
| 94 | #ifdef __powerpc64__ |
| 95 | #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) |
| 96 | #else |
| 97 | #define user_mode(regs) (((regs)->msr & MSR_PR) != 0) |
| 98 | #endif |
| 99 | |
| 100 | #define force_successful_syscall_return() \ |
| 101 | do { \ |
David Woodhouse | 401d1f0 | 2005-11-15 18:52:18 +0000 | [diff] [blame] | 102 | set_thread_flag(TIF_NOERROR); \ |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 103 | } while(0) |
| 104 | |
Benjamin Herrenschmidt | 865418d | 2007-06-04 15:15:44 +1000 | [diff] [blame] | 105 | struct task_struct; |
| 106 | extern unsigned long ptrace_get_reg(struct task_struct *task, int regno); |
| 107 | extern int ptrace_put_reg(struct task_struct *task, int regno, |
| 108 | unsigned long data); |
| 109 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 110 | /* |
| 111 | * We use the least-significant bit of the trap field to indicate |
| 112 | * whether we have saved the full set of registers, or only a |
| 113 | * partial set. A 1 there means the partial set. |
| 114 | * On 4xx we use the next bit to indicate whether the exception |
| 115 | * is a critical exception (1 means it is). |
| 116 | */ |
| 117 | #define FULL_REGS(regs) (((regs)->trap & 1) == 0) |
| 118 | #ifndef __powerpc64__ |
Benjamin Herrenschmidt | 47c0bd1 | 2007-12-21 15:39:21 +1100 | [diff] [blame] | 119 | #define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) != 0) |
| 120 | #define IS_MCHECK_EXC(regs) (((regs)->trap & 4) != 0) |
Kumar Gala | 663276b | 2008-04-30 20:44:53 +1000 | [diff] [blame] | 121 | #define IS_DEBUG_EXC(regs) (((regs)->trap & 8) != 0) |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 122 | #endif /* ! __powerpc64__ */ |
| 123 | #define TRAP(regs) ((regs)->trap & ~0xF) |
| 124 | #ifdef __powerpc64__ |
| 125 | #define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1) |
| 126 | #else |
| 127 | #define CHECK_FULL_REGS(regs) \ |
| 128 | do { \ |
| 129 | if ((regs)->trap & 1) \ |
Harvey Harrison | 653c031 | 2008-10-20 16:00:08 -0700 | [diff] [blame] | 130 | printk(KERN_CRIT "%s: partial register set\n", __func__); \ |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 131 | } while (0) |
| 132 | #endif /* __powerpc64__ */ |
| 133 | |
Roland McGrath | 2a84b0d | 2008-01-30 13:30:51 +0100 | [diff] [blame] | 134 | /* |
| 135 | * These are defined as per linux/ptrace.h, which see. |
| 136 | */ |
| 137 | #define arch_has_single_step() (1) |
Roland McGrath | ec097c8 | 2009-05-28 21:26:38 +0000 | [diff] [blame] | 138 | #define arch_has_block_step() (!cpu_has_feature(CPU_FTR_601)) |
Roland McGrath | 2a84b0d | 2008-01-30 13:30:51 +0100 | [diff] [blame] | 139 | extern void user_enable_single_step(struct task_struct *); |
Roland McGrath | ec097c8 | 2009-05-28 21:26:38 +0000 | [diff] [blame] | 140 | extern void user_enable_block_step(struct task_struct *); |
Roland McGrath | 2a84b0d | 2008-01-30 13:30:51 +0100 | [diff] [blame] | 141 | extern void user_disable_single_step(struct task_struct *); |
| 142 | |
Oleg Nesterov | 25baa35 | 2009-12-15 16:47:18 -0800 | [diff] [blame^] | 143 | #define ARCH_HAS_USER_SINGLE_STEP_INFO |
| 144 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 145 | #endif /* __ASSEMBLY__ */ |
| 146 | |
| 147 | #endif /* __KERNEL__ */ |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* |
| 150 | * Offsets used by 'ptrace' system call interface. |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 151 | * These can't be changed without breaking binary compatibility |
| 152 | * with MkLinux, etc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | */ |
| 154 | #define PT_R0 0 |
| 155 | #define PT_R1 1 |
| 156 | #define PT_R2 2 |
| 157 | #define PT_R3 3 |
| 158 | #define PT_R4 4 |
| 159 | #define PT_R5 5 |
| 160 | #define PT_R6 6 |
| 161 | #define PT_R7 7 |
| 162 | #define PT_R8 8 |
| 163 | #define PT_R9 9 |
| 164 | #define PT_R10 10 |
| 165 | #define PT_R11 11 |
| 166 | #define PT_R12 12 |
| 167 | #define PT_R13 13 |
| 168 | #define PT_R14 14 |
| 169 | #define PT_R15 15 |
| 170 | #define PT_R16 16 |
| 171 | #define PT_R17 17 |
| 172 | #define PT_R18 18 |
| 173 | #define PT_R19 19 |
| 174 | #define PT_R20 20 |
| 175 | #define PT_R21 21 |
| 176 | #define PT_R22 22 |
| 177 | #define PT_R23 23 |
| 178 | #define PT_R24 24 |
| 179 | #define PT_R25 25 |
| 180 | #define PT_R26 26 |
| 181 | #define PT_R27 27 |
| 182 | #define PT_R28 28 |
| 183 | #define PT_R29 29 |
| 184 | #define PT_R30 30 |
| 185 | #define PT_R31 31 |
| 186 | |
| 187 | #define PT_NIP 32 |
| 188 | #define PT_MSR 33 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | #define PT_ORIG_R3 34 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | #define PT_CTR 35 |
| 191 | #define PT_LNK 36 |
| 192 | #define PT_XER 37 |
| 193 | #define PT_CCR 38 |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 194 | #ifndef __powerpc64__ |
| 195 | #define PT_MQ 39 |
| 196 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | #define PT_SOFTE 39 |
Benjamin Herrenschmidt | e17666b | 2007-06-04 15:15:43 +1000 | [diff] [blame] | 198 | #endif |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 199 | #define PT_TRAP 40 |
| 200 | #define PT_DAR 41 |
| 201 | #define PT_DSISR 42 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | #define PT_RESULT 43 |
Benjamin Herrenschmidt | e17666b | 2007-06-04 15:15:43 +1000 | [diff] [blame] | 203 | #define PT_REGS_COUNT 44 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 205 | #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 207 | #ifndef __powerpc64__ |
| 208 | |
| 209 | #define PT_FPR31 (PT_FPR0 + 2*31) |
| 210 | #define PT_FPSCR (PT_FPR0 + 2*32 + 1) |
| 211 | |
| 212 | #else /* __powerpc64__ */ |
| 213 | |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 214 | #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | #ifdef __KERNEL__ |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 217 | #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | #endif |
| 219 | |
| 220 | #define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */ |
| 221 | #define PT_VSCR (PT_VR0 + 32*2 + 1) |
| 222 | #define PT_VRSAVE (PT_VR0 + 33*2) |
| 223 | |
| 224 | #ifdef __KERNEL__ |
| 225 | #define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */ |
| 226 | #define PT_VSCR_32 (PT_VR0 + 32*4 + 3) |
| 227 | #define PT_VRSAVE_32 (PT_VR0 + 33*4) |
| 228 | #endif |
| 229 | |
Michael Neuling | ce48b21 | 2008-06-25 14:07:18 +1000 | [diff] [blame] | 230 | /* |
| 231 | * Only store first 32 VSRs here. The second 32 VSRs in VR0-31 |
| 232 | */ |
| 233 | #define PT_VSR0 150 /* each VSR reg occupies 2 slots in 64-bit */ |
| 234 | #define PT_VSR31 (PT_VSR0 + 2*31) |
| 235 | #ifdef __KERNEL__ |
| 236 | #define PT_VSR0_32 300 /* each VSR reg occupies 4 slots in 32-bit */ |
| 237 | #endif |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 238 | #endif /* __powerpc64__ */ |
| 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | /* |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 241 | * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go. |
| 242 | * The transfer totals 34 quadword. Quadwords 0-31 contain the |
| 243 | * corresponding vector registers. Quadword 32 contains the vscr as the |
| 244 | * last word (offset 12) within that quadword. Quadword 33 contains the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | * vrsave as the first word (offset 0) within the quadword. |
| 246 | * |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 247 | * This definition of the VMX state is compatible with the current PPC32 |
| 248 | * ptrace interface. This allows signal handling and ptrace to use the same |
| 249 | * structures. This also simplifies the implementation of a bi-arch |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | * (combined (32- and 64-bit) gdb. |
| 251 | */ |
| 252 | #define PTRACE_GETVRREGS 18 |
| 253 | #define PTRACE_SETVRREGS 19 |
| 254 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 255 | /* Get/set all the upper 32-bits of the SPE registers, accumulator, and |
| 256 | * spefscr, in one go */ |
| 257 | #define PTRACE_GETEVRREGS 20 |
| 258 | #define PTRACE_SETEVRREGS 21 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
Michael Neuling | ce48b21 | 2008-06-25 14:07:18 +1000 | [diff] [blame] | 260 | /* Get the first 32 128bit VSX registers */ |
| 261 | #define PTRACE_GETVSRREGS 27 |
| 262 | #define PTRACE_SETVSRREGS 28 |
| 263 | |
Anton Blanchard | a94d308 | 2005-09-10 16:01:10 +1000 | [diff] [blame] | 264 | /* |
| 265 | * Get or set a debug register. The first 16 are DABR registers and the |
| 266 | * second 16 are IABR registers. |
| 267 | */ |
| 268 | #define PTRACE_GET_DEBUGREG 25 |
| 269 | #define PTRACE_SET_DEBUGREG 26 |
| 270 | |
Benjamin Herrenschmidt | e17666b | 2007-06-04 15:15:43 +1000 | [diff] [blame] | 271 | /* (new) PTRACE requests using the same numbers as x86 and the same |
| 272 | * argument ordering. Additionally, they support more registers too |
| 273 | */ |
| 274 | #define PTRACE_GETREGS 12 |
| 275 | #define PTRACE_SETREGS 13 |
| 276 | #define PTRACE_GETFPREGS 14 |
| 277 | #define PTRACE_SETFPREGS 15 |
| 278 | #define PTRACE_GETREGS64 22 |
| 279 | #define PTRACE_SETREGS64 23 |
| 280 | |
| 281 | /* (old) PTRACE requests with inverted arguments */ |
Anton Blanchard | a098722 | 2005-09-10 16:01:08 +1000 | [diff] [blame] | 282 | #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */ |
| 283 | #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */ |
| 284 | #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */ |
| 285 | #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */ |
| 286 | |
| 287 | /* Calls to trace a 64bit program from a 32bit program */ |
| 288 | #define PPC_PTRACE_PEEKTEXT_3264 0x95 |
| 289 | #define PPC_PTRACE_PEEKDATA_3264 0x94 |
| 290 | #define PPC_PTRACE_POKETEXT_3264 0x93 |
| 291 | #define PPC_PTRACE_POKEDATA_3264 0x92 |
| 292 | #define PPC_PTRACE_PEEKUSR_3264 0x91 |
| 293 | #define PPC_PTRACE_POKEUSR_3264 0x90 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Roland McGrath | ec097c8 | 2009-05-28 21:26:38 +0000 | [diff] [blame] | 295 | #define PTRACE_SINGLEBLOCK 0x100 /* resume execution until next branch */ |
| 296 | |
Stephen Rothwell | da80d46 | 2005-11-03 15:14:36 +1100 | [diff] [blame] | 297 | #endif /* _ASM_POWERPC_PTRACE_H */ |