1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 * 22 * $FreeBSD$ 23 */ 24 /* 25 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 #include <sys/cdefs.h> 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/stack.h> 34 #include <sys/pcpu.h> 35 36 #include <machine/frame.h> 37 #include <machine/md_var.h> 38 39 #include <vm/vm.h> 40 #include <vm/vm_param.h> 41 #include <vm/pmap.h> 42 43 #include <machine/atomic.h> 44 #include <machine/db_machdep.h> 45 #include <machine/md_var.h> 46 #include <machine/stack.h> 47 #include <ddb/db_sym.h> 48 #include <ddb/ddb.h> 49 #include <sys/kdb.h> 50 51 #include "regset.h" 52 53 /* 54 * Wee need some reasonable default to prevent backtrace code 55 * from wandering too far 56 */ 57 #define MAX_FUNCTION_SIZE 0x10000 58 #define MAX_PROLOGUE_SIZE 0x100 59 60 61 uint8_t dtrace_fuword8_nocheck(void *); 62 uint16_t dtrace_fuword16_nocheck(void *); 63 uint32_t dtrace_fuword32_nocheck(void *); 64 uint64_t dtrace_fuword64_nocheck(void *); 65 66 void 67 dtrace_getpcstack(pc_t *pcstack, int pcstack_limit, int aframes, 68 uint32_t *intrpc) 69 { 70 struct unwind_state state; 71 register_t sp; 72 int scp_offset; 73 int depth = 0; 74 75 if (intrpc != 0) 76 pcstack[depth++] = (pc_t) intrpc; 77 78 aframes++; 79 80 __asm __volatile("mov %0, sp" : "=&r" (sp)); 81 82 state.registers[FP] = (uint32_t)__builtin_frame_address(0); 83 state.registers[SP] = sp; 84 state.registers[LR] = (uint32_t)__builtin_return_address(0); 85 state.registers[PC] = (uint32_t)dtrace_getpcstack; 86 87 while (depth < pcstack_limit) { 88 int done; 89 90 done = unwind_stack_one(&state, 1); 91 92 /* 93 * NB: Unlike some other architectures, we don't need to 94 * explicitly insert cpu_dtrace_caller as it appears in the 95 * normal kernel stack trace rather than a special trap frame. 96 */ 97 if (aframes > 0) { 98 aframes--; 99 } else { 100 pcstack[depth++] = state.registers[PC]; 101 } 102 103 if (done) 104 break; 105 } 106 107 for (; depth < pcstack_limit; depth++) { 108 pcstack[depth] = 0; 109 } 110 } 111 112 void 113 dtrace_getupcstack(uint64_t *pcstack, int pcstack_limit) 114 { 115 printf("IMPLEMENT ME: %s\n", __func__); 116 } 117 118 int 119 dtrace_getustackdepth(void) 120 { 121 printf("IMPLEMENT ME: %s\n", __func__); 122 return (0); 123 } 124 125 void 126 dtrace_getufpstack(uint64_t *pcstack, uint64_t *fpstack, int pcstack_limit) 127 { 128 printf("IMPLEMENT ME: %s\n", __func__); 129 } 130 131 /*ARGSUSED*/ 132 uint64_t 133 dtrace_getarg(int arg, int aframes) 134 { 135 /* struct arm_frame *fp = (struct arm_frame *)dtrace_getfp();*/ 136 137 return (0); 138 } 139 140 int 141 dtrace_getstackdepth(int aframes) 142 { 143 struct unwind_state state; 144 register_t sp; 145 int scp_offset; 146 int done = 0; 147 int depth = 1; 148 149 __asm __volatile("mov %0, sp" : "=&r" (sp)); 150 151 state.registers[FP] = (uint32_t)__builtin_frame_address(0); 152 state.registers[SP] = sp; 153 state.registers[LR] = (uint32_t)__builtin_return_address(0); 154 state.registers[PC] = (uint32_t)dtrace_getstackdepth; 155 156 do { 157 done = unwind_stack_one(&state, 1); 158 depth++; 159 } while (!done); 160 161 if (depth < aframes) 162 return 0; 163 else 164 return depth - aframes; 165 } 166 167 ulong_t 168 dtrace_getreg(struct trapframe *rp, uint_t reg) 169 { 170 printf("IMPLEMENT ME: %s\n", __func__); 171 172 return (0); 173 } 174 175 static int 176 dtrace_copycheck(uintptr_t uaddr, uintptr_t kaddr, size_t size) 177 { 178 179 if (uaddr + size > VM_MAXUSER_ADDRESS || uaddr + size < uaddr) { 180 DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR); 181 cpu_core[curcpu].cpuc_dtrace_illval = uaddr; 182 return (0); 183 } 184 185 return (1); 186 } 187 188 void 189 dtrace_copyin(uintptr_t uaddr, uintptr_t kaddr, size_t size, 190 volatile uint16_t *flags) 191 { 192 if (dtrace_copycheck(uaddr, kaddr, size)) 193 dtrace_copy(uaddr, kaddr, size); 194 } 195 196 void 197 dtrace_copyout(uintptr_t kaddr, uintptr_t uaddr, size_t size, 198 volatile uint16_t *flags) 199 { 200 if (dtrace_copycheck(uaddr, kaddr, size)) 201 dtrace_copy(kaddr, uaddr, size); 202 } 203 204 void 205 dtrace_copyinstr(uintptr_t uaddr, uintptr_t kaddr, size_t size, 206 volatile uint16_t *flags) 207 { 208 if (dtrace_copycheck(uaddr, kaddr, size)) 209 dtrace_copystr(uaddr, kaddr, size, flags); 210 } 211 212 void 213 dtrace_copyoutstr(uintptr_t kaddr, uintptr_t uaddr, size_t size, 214 volatile uint16_t *flags) 215 { 216 if (dtrace_copycheck(uaddr, kaddr, size)) 217 dtrace_copystr(kaddr, uaddr, size, flags); 218 } 219 220 uint8_t 221 dtrace_fuword8(void *uaddr) 222 { 223 if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) { 224 DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR); 225 cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr; 226 return (0); 227 } 228 return (dtrace_fuword8_nocheck(uaddr)); 229 } 230 231 uint16_t 232 dtrace_fuword16(void *uaddr) 233 { 234 if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) { 235 DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR); 236 cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr; 237 return (0); 238 } 239 return (dtrace_fuword16_nocheck(uaddr)); 240 } 241 242 uint32_t 243 dtrace_fuword32(void *uaddr) 244 { 245 if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) { 246 DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR); 247 cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr; 248 return (0); 249 } 250 return (dtrace_fuword32_nocheck(uaddr)); 251 } 252 253 uint64_t 254 dtrace_fuword64(void *uaddr) 255 { 256 if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) { 257 DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR); 258 cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr; 259 return (0); 260 } 261 return (dtrace_fuword64_nocheck(uaddr)); 262 } 263