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da80d460 SR |
1 | #ifndef _ASM_POWERPC_PTRACE_H |
2 | #define _ASM_POWERPC_PTRACE_H | |
1da177e4 LT |
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 | |
da80d460 | 19 | * the PT_* values below. This simplifies arch/powerpc/kernel/ptrace.c. |
1da177e4 LT |
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 | ||
3162d92d | 27 | #include <linux/types.h> |
3162d92d | 28 | |
1da177e4 | 29 | #ifndef __ASSEMBLY__ |
a0987224 | 30 | |
1da177e4 | 31 | struct pt_regs { |
a0987224 AB |
32 | unsigned long gpr[32]; |
33 | unsigned long nip; | |
34 | unsigned long msr; | |
da80d460 | 35 | unsigned long orig_gpr3; /* Used for restarting system calls */ |
a0987224 AB |
36 | unsigned long ctr; |
37 | unsigned long link; | |
38 | unsigned long xer; | |
39 | unsigned long ccr; | |
da80d460 SR |
40 | #ifdef __powerpc64__ |
41 | unsigned long softe; /* Soft enabled/disabled */ | |
42 | #else | |
43 | unsigned long mq; /* 601 only (not used at present) */ | |
44 | /* Used on APUS to hold IPL value. */ | |
45 | #endif | |
46 | unsigned long trap; /* Reason for being here */ | |
47 | /* N.B. for critical exceptions on 4xx, the dar and dsisr | |
48 | fields are overloaded to hold srr0 and srr1. */ | |
49 | unsigned long dar; /* Fault registers */ | |
50 | unsigned long dsisr; /* on 4xx/Book-E used for ESR */ | |
51 | unsigned long result; /* Result of a system call */ | |
1da177e4 LT |
52 | }; |
53 | ||
da80d460 | 54 | #endif /* __ASSEMBLY__ */ |
1da177e4 | 55 | |
a0987224 AB |
56 | #ifdef __KERNEL__ |
57 | ||
da80d460 SR |
58 | #ifdef __powerpc64__ |
59 | ||
60 | #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */ | |
ec2b36b9 BH |
61 | #define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */ |
62 | #define STACK_FRAME_REGS_MARKER ASM_CONST(0x7265677368657265) | |
63 | #define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \ | |
64 | STACK_FRAME_OVERHEAD + 288) | |
65 | #define STACK_FRAME_MARKER 12 | |
da80d460 SR |
66 | |
67 | /* Size of dummy stack frame allocated when calling signal handler. */ | |
68 | #define __SIGNAL_FRAMESIZE 128 | |
69 | #define __SIGNAL_FRAMESIZE32 64 | |
70 | ||
71 | #else /* __powerpc64__ */ | |
72 | ||
73 | #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ | |
ec2b36b9 BH |
74 | #define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */ |
75 | #define STACK_FRAME_REGS_MARKER ASM_CONST(0x72656773) | |
76 | #define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD) | |
77 | #define STACK_FRAME_MARKER 2 | |
da80d460 SR |
78 | |
79 | /* Size of stack frame allocated when calling signal handler. */ | |
80 | #define __SIGNAL_FRAMESIZE 64 | |
81 | ||
82 | #endif /* __powerpc64__ */ | |
a0987224 | 83 | |
da80d460 SR |
84 | #ifndef __ASSEMBLY__ |
85 | ||
86 | #define instruction_pointer(regs) ((regs)->nip) | |
f1ba1285 | 87 | #define user_stack_pointer(regs) ((regs)->gpr[1]) |
359e4284 | 88 | #define kernel_stack_pointer(regs) ((regs)->gpr[1]) |
b3f827cb AM |
89 | #define regs_return_value(regs) ((regs)->gpr[3]) |
90 | ||
1da177e4 LT |
91 | #ifdef CONFIG_SMP |
92 | extern unsigned long profile_pc(struct pt_regs *regs); | |
93 | #else | |
94 | #define profile_pc(regs) instruction_pointer(regs) | |
95 | #endif | |
96 | ||
da80d460 | 97 | #ifdef __powerpc64__ |
1da177e4 | 98 | #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) |
da80d460 SR |
99 | #else |
100 | #define user_mode(regs) (((regs)->msr & MSR_PR) != 0) | |
101 | #endif | |
1da177e4 LT |
102 | |
103 | #define force_successful_syscall_return() \ | |
da80d460 | 104 | do { \ |
401d1f02 | 105 | set_thread_flag(TIF_NOERROR); \ |
da80d460 | 106 | } while(0) |
1da177e4 | 107 | |
865418d8 BH |
108 | struct task_struct; |
109 | extern unsigned long ptrace_get_reg(struct task_struct *task, int regno); | |
110 | extern int ptrace_put_reg(struct task_struct *task, int regno, | |
111 | unsigned long data); | |
112 | ||
1da177e4 LT |
113 | /* |
114 | * We use the least-significant bit of the trap field to indicate | |
115 | * whether we have saved the full set of registers, or only a | |
116 | * partial set. A 1 there means the partial set. | |
da80d460 SR |
117 | * On 4xx we use the next bit to indicate whether the exception |
118 | * is a critical exception (1 means it is). | |
1da177e4 LT |
119 | */ |
120 | #define FULL_REGS(regs) (((regs)->trap & 1) == 0) | |
da80d460 | 121 | #ifndef __powerpc64__ |
47c0bd1a BH |
122 | #define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) != 0) |
123 | #define IS_MCHECK_EXC(regs) (((regs)->trap & 4) != 0) | |
663276b7 | 124 | #define IS_DEBUG_EXC(regs) (((regs)->trap & 8) != 0) |
da80d460 | 125 | #endif /* ! __powerpc64__ */ |
1da177e4 | 126 | #define TRAP(regs) ((regs)->trap & ~0xF) |
da80d460 | 127 | #ifdef __powerpc64__ |
1da177e4 | 128 | #define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1) |
da80d460 SR |
129 | #else |
130 | #define CHECK_FULL_REGS(regs) \ | |
131 | do { \ | |
132 | if ((regs)->trap & 1) \ | |
653c0316 | 133 | printk(KERN_CRIT "%s: partial register set\n", __func__); \ |
da80d460 SR |
134 | } while (0) |
135 | #endif /* __powerpc64__ */ | |
a0987224 | 136 | |
2a84b0d7 | 137 | #define arch_has_single_step() (1) |
ec097c84 | 138 | #define arch_has_block_step() (!cpu_has_feature(CPU_FTR_601)) |
25baa35b ON |
139 | #define ARCH_HAS_USER_SINGLE_STEP_INFO |
140 | ||
359e4284 MS |
141 | /* |
142 | * kprobe-based event tracer support | |
143 | */ | |
144 | ||
145 | #include <linux/stddef.h> | |
146 | #include <linux/thread_info.h> | |
147 | extern int regs_query_register_offset(const char *name); | |
148 | extern const char *regs_query_register_name(unsigned int offset); | |
149 | #define MAX_REG_OFFSET (offsetof(struct pt_regs, dsisr)) | |
150 | ||
151 | /** | |
152 | * regs_get_register() - get register value from its offset | |
153 | * @regs: pt_regs from which register value is gotten | |
154 | * @offset: offset number of the register. | |
155 | * | |
156 | * regs_get_register returns the value of a register whose offset from @regs. | |
157 | * The @offset is the offset of the register in struct pt_regs. | |
158 | * If @offset is bigger than MAX_REG_OFFSET, this returns 0. | |
159 | */ | |
160 | static inline unsigned long regs_get_register(struct pt_regs *regs, | |
161 | unsigned int offset) | |
162 | { | |
163 | if (unlikely(offset > MAX_REG_OFFSET)) | |
164 | return 0; | |
165 | return *(unsigned long *)((unsigned long)regs + offset); | |
166 | } | |
167 | ||
168 | /** | |
169 | * regs_within_kernel_stack() - check the address in the stack | |
170 | * @regs: pt_regs which contains kernel stack pointer. | |
171 | * @addr: address which is checked. | |
172 | * | |
173 | * regs_within_kernel_stack() checks @addr is within the kernel stack page(s). | |
174 | * If @addr is within the kernel stack, it returns true. If not, returns false. | |
175 | */ | |
176 | ||
177 | static inline bool regs_within_kernel_stack(struct pt_regs *regs, | |
178 | unsigned long addr) | |
179 | { | |
180 | return ((addr & ~(THREAD_SIZE - 1)) == | |
181 | (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1))); | |
182 | } | |
183 | ||
184 | /** | |
185 | * regs_get_kernel_stack_nth() - get Nth entry of the stack | |
186 | * @regs: pt_regs which contains kernel stack pointer. | |
187 | * @n: stack entry number. | |
188 | * | |
189 | * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which | |
190 | * is specified by @regs. If the @n th entry is NOT in the kernel stack, | |
191 | * this returns 0. | |
192 | */ | |
193 | static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, | |
194 | unsigned int n) | |
195 | { | |
196 | unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs); | |
197 | addr += n; | |
198 | if (regs_within_kernel_stack(regs, (unsigned long)addr)) | |
199 | return *addr; | |
200 | else | |
201 | return 0; | |
202 | } | |
203 | ||
a0987224 AB |
204 | #endif /* __ASSEMBLY__ */ |
205 | ||
da80d460 | 206 | #endif /* __KERNEL__ */ |
a0987224 | 207 | |
1da177e4 LT |
208 | /* |
209 | * Offsets used by 'ptrace' system call interface. | |
da80d460 SR |
210 | * These can't be changed without breaking binary compatibility |
211 | * with MkLinux, etc. | |
1da177e4 LT |
212 | */ |
213 | #define PT_R0 0 | |
214 | #define PT_R1 1 | |
215 | #define PT_R2 2 | |
216 | #define PT_R3 3 | |
217 | #define PT_R4 4 | |
218 | #define PT_R5 5 | |
219 | #define PT_R6 6 | |
220 | #define PT_R7 7 | |
221 | #define PT_R8 8 | |
222 | #define PT_R9 9 | |
223 | #define PT_R10 10 | |
224 | #define PT_R11 11 | |
225 | #define PT_R12 12 | |
226 | #define PT_R13 13 | |
227 | #define PT_R14 14 | |
228 | #define PT_R15 15 | |
229 | #define PT_R16 16 | |
230 | #define PT_R17 17 | |
231 | #define PT_R18 18 | |
232 | #define PT_R19 19 | |
233 | #define PT_R20 20 | |
234 | #define PT_R21 21 | |
235 | #define PT_R22 22 | |
236 | #define PT_R23 23 | |
237 | #define PT_R24 24 | |
238 | #define PT_R25 25 | |
239 | #define PT_R26 26 | |
240 | #define PT_R27 27 | |
241 | #define PT_R28 28 | |
242 | #define PT_R29 29 | |
243 | #define PT_R30 30 | |
244 | #define PT_R31 31 | |
245 | ||
246 | #define PT_NIP 32 | |
247 | #define PT_MSR 33 | |
1da177e4 | 248 | #define PT_ORIG_R3 34 |
1da177e4 LT |
249 | #define PT_CTR 35 |
250 | #define PT_LNK 36 | |
251 | #define PT_XER 37 | |
252 | #define PT_CCR 38 | |
da80d460 SR |
253 | #ifndef __powerpc64__ |
254 | #define PT_MQ 39 | |
255 | #else | |
1da177e4 | 256 | #define PT_SOFTE 39 |
e17666ba | 257 | #endif |
a0987224 AB |
258 | #define PT_TRAP 40 |
259 | #define PT_DAR 41 | |
260 | #define PT_DSISR 42 | |
1da177e4 | 261 | #define PT_RESULT 43 |
e17666ba | 262 | #define PT_REGS_COUNT 44 |
1da177e4 | 263 | |
da80d460 SR |
264 | #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ |
265 | ||
266 | #ifndef __powerpc64__ | |
267 | ||
268 | #define PT_FPR31 (PT_FPR0 + 2*31) | |
269 | #define PT_FPSCR (PT_FPR0 + 2*32 + 1) | |
270 | ||
271 | #else /* __powerpc64__ */ | |
1da177e4 | 272 | |
a0987224 | 273 | #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */ |
1da177e4 LT |
274 | |
275 | #ifdef __KERNEL__ | |
a0987224 | 276 | #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */ |
1da177e4 LT |
277 | #endif |
278 | ||
279 | #define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */ | |
280 | #define PT_VSCR (PT_VR0 + 32*2 + 1) | |
281 | #define PT_VRSAVE (PT_VR0 + 33*2) | |
282 | ||
283 | #ifdef __KERNEL__ | |
284 | #define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */ | |
285 | #define PT_VSCR_32 (PT_VR0 + 32*4 + 3) | |
286 | #define PT_VRSAVE_32 (PT_VR0 + 33*4) | |
287 | #endif | |
288 | ||
ce48b210 MN |
289 | /* |
290 | * Only store first 32 VSRs here. The second 32 VSRs in VR0-31 | |
291 | */ | |
292 | #define PT_VSR0 150 /* each VSR reg occupies 2 slots in 64-bit */ | |
293 | #define PT_VSR31 (PT_VSR0 + 2*31) | |
294 | #ifdef __KERNEL__ | |
295 | #define PT_VSR0_32 300 /* each VSR reg occupies 4 slots in 32-bit */ | |
296 | #endif | |
da80d460 SR |
297 | #endif /* __powerpc64__ */ |
298 | ||
1da177e4 | 299 | /* |
da80d460 SR |
300 | * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go. |
301 | * The transfer totals 34 quadword. Quadwords 0-31 contain the | |
302 | * corresponding vector registers. Quadword 32 contains the vscr as the | |
303 | * last word (offset 12) within that quadword. Quadword 33 contains the | |
1da177e4 LT |
304 | * vrsave as the first word (offset 0) within the quadword. |
305 | * | |
da80d460 SR |
306 | * This definition of the VMX state is compatible with the current PPC32 |
307 | * ptrace interface. This allows signal handling and ptrace to use the same | |
308 | * structures. This also simplifies the implementation of a bi-arch | |
1da177e4 LT |
309 | * (combined (32- and 64-bit) gdb. |
310 | */ | |
311 | #define PTRACE_GETVRREGS 18 | |
312 | #define PTRACE_SETVRREGS 19 | |
313 | ||
da80d460 SR |
314 | /* Get/set all the upper 32-bits of the SPE registers, accumulator, and |
315 | * spefscr, in one go */ | |
316 | #define PTRACE_GETEVRREGS 20 | |
317 | #define PTRACE_SETEVRREGS 21 | |
1da177e4 | 318 | |
ce48b210 MN |
319 | /* Get the first 32 128bit VSX registers */ |
320 | #define PTRACE_GETVSRREGS 27 | |
321 | #define PTRACE_SETVSRREGS 28 | |
322 | ||
a94d3085 AB |
323 | /* |
324 | * Get or set a debug register. The first 16 are DABR registers and the | |
325 | * second 16 are IABR registers. | |
326 | */ | |
327 | #define PTRACE_GET_DEBUGREG 25 | |
328 | #define PTRACE_SET_DEBUGREG 26 | |
329 | ||
e17666ba BH |
330 | /* (new) PTRACE requests using the same numbers as x86 and the same |
331 | * argument ordering. Additionally, they support more registers too | |
332 | */ | |
333 | #define PTRACE_GETREGS 12 | |
334 | #define PTRACE_SETREGS 13 | |
335 | #define PTRACE_GETFPREGS 14 | |
336 | #define PTRACE_SETFPREGS 15 | |
337 | #define PTRACE_GETREGS64 22 | |
338 | #define PTRACE_SETREGS64 23 | |
339 | ||
340 | /* (old) PTRACE requests with inverted arguments */ | |
a0987224 AB |
341 | #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */ |
342 | #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */ | |
343 | #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */ | |
344 | #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */ | |
345 | ||
346 | /* Calls to trace a 64bit program from a 32bit program */ | |
347 | #define PPC_PTRACE_PEEKTEXT_3264 0x95 | |
348 | #define PPC_PTRACE_PEEKDATA_3264 0x94 | |
349 | #define PPC_PTRACE_POKETEXT_3264 0x93 | |
350 | #define PPC_PTRACE_POKEDATA_3264 0x92 | |
351 | #define PPC_PTRACE_PEEKUSR_3264 0x91 | |
352 | #define PPC_PTRACE_POKEUSR_3264 0x90 | |
1da177e4 | 353 | |
ec097c84 RM |
354 | #define PTRACE_SINGLEBLOCK 0x100 /* resume execution until next branch */ |
355 | ||
3162d92d DK |
356 | #define PPC_PTRACE_GETHWDBGINFO 0x89 |
357 | #define PPC_PTRACE_SETHWDEBUG 0x88 | |
358 | #define PPC_PTRACE_DELHWDEBUG 0x87 | |
359 | ||
360 | #ifndef __ASSEMBLY__ | |
361 | ||
362 | struct ppc_debug_info { | |
bf23690b SR |
363 | __u32 version; /* Only version 1 exists to date */ |
364 | __u32 num_instruction_bps; | |
365 | __u32 num_data_bps; | |
366 | __u32 num_condition_regs; | |
367 | __u32 data_bp_alignment; | |
368 | __u32 sizeof_condition; /* size of the DVC register */ | |
369 | __u64 features; | |
3162d92d DK |
370 | }; |
371 | ||
372 | #endif /* __ASSEMBLY__ */ | |
373 | ||
374 | /* | |
375 | * features will have bits indication whether there is support for: | |
376 | */ | |
377 | #define PPC_DEBUG_FEATURE_INSN_BP_RANGE 0x0000000000000001 | |
378 | #define PPC_DEBUG_FEATURE_INSN_BP_MASK 0x0000000000000002 | |
379 | #define PPC_DEBUG_FEATURE_DATA_BP_RANGE 0x0000000000000004 | |
380 | #define PPC_DEBUG_FEATURE_DATA_BP_MASK 0x0000000000000008 | |
381 | ||
382 | #ifndef __ASSEMBLY__ | |
383 | ||
384 | struct ppc_hw_breakpoint { | |
bf23690b SR |
385 | __u32 version; /* currently, version must be 1 */ |
386 | __u32 trigger_type; /* only some combinations allowed */ | |
387 | __u32 addr_mode; /* address match mode */ | |
388 | __u32 condition_mode; /* break/watchpoint condition flags */ | |
389 | __u64 addr; /* break/watchpoint address */ | |
390 | __u64 addr2; /* range end or mask */ | |
391 | __u64 condition_value; /* contents of the DVC register */ | |
3162d92d DK |
392 | }; |
393 | ||
394 | #endif /* __ASSEMBLY__ */ | |
395 | ||
396 | /* | |
397 | * Trigger Type | |
398 | */ | |
399 | #define PPC_BREAKPOINT_TRIGGER_EXECUTE 0x00000001 | |
400 | #define PPC_BREAKPOINT_TRIGGER_READ 0x00000002 | |
401 | #define PPC_BREAKPOINT_TRIGGER_WRITE 0x00000004 | |
402 | #define PPC_BREAKPOINT_TRIGGER_RW \ | |
403 | (PPC_BREAKPOINT_TRIGGER_READ | PPC_BREAKPOINT_TRIGGER_WRITE) | |
404 | ||
405 | /* | |
406 | * Address Mode | |
407 | */ | |
408 | #define PPC_BREAKPOINT_MODE_EXACT 0x00000000 | |
409 | #define PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE 0x00000001 | |
410 | #define PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE 0x00000002 | |
411 | #define PPC_BREAKPOINT_MODE_MASK 0x00000003 | |
412 | ||
413 | /* | |
414 | * Condition Mode | |
415 | */ | |
416 | #define PPC_BREAKPOINT_CONDITION_MODE 0x00000003 | |
417 | #define PPC_BREAKPOINT_CONDITION_NONE 0x00000000 | |
418 | #define PPC_BREAKPOINT_CONDITION_AND 0x00000001 | |
419 | #define PPC_BREAKPOINT_CONDITION_EXACT PPC_BREAKPOINT_CONDITION_AND | |
420 | #define PPC_BREAKPOINT_CONDITION_OR 0x00000002 | |
421 | #define PPC_BREAKPOINT_CONDITION_AND_OR 0x00000003 | |
422 | #define PPC_BREAKPOINT_CONDITION_BE_ALL 0x00ff0000 | |
423 | #define PPC_BREAKPOINT_CONDITION_BE_SHIFT 16 | |
424 | #define PPC_BREAKPOINT_CONDITION_BE(n) \ | |
425 | (1<<((n)+PPC_BREAKPOINT_CONDITION_BE_SHIFT)) | |
426 | ||
da80d460 | 427 | #endif /* _ASM_POWERPC_PTRACE_H */ |