1/* 2 * Copyright (c) 2004 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/types.h> 31#include <machine/asm.h> 32#include <machine/pcb.h> 33#include <machine/frame.h> 34#include <err.h> 35#include <kvm.h> 36#include <string.h> 37 38#include <defs.h> 39#include <target.h> 40#include <gdbthread.h> 41#include <inferior.h> 42#include <regcache.h> 43#include <frame-unwind.h> 44#include <sparc-tdep.h> 45#include <sparc64-tdep.h> 46 47#include "kgdb.h" 48 49CORE_ADDR 50kgdb_trgt_core_pcb(u_int cpuid) 51{ 52 return (kgdb_trgt_stop_pcb(cpuid, sizeof(struct pcb))); 53} 54 55void 56kgdb_trgt_fetch_registers(int regno __unused) 57{ 58 struct kthr *kt; 59 struct pcb pcb; 60 61 kt = kgdb_thr_lookup_tid(ptid_get_pid(inferior_ptid)); 62 if (kt == NULL) 63 return; 64 if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) { 65 warnx("kvm_read: %s", kvm_geterr(kvm)); 66 memset(&pcb, 0, sizeof(pcb)); 67 } 68 69 supply_register(SPARC_SP_REGNUM, (char *)&pcb.pcb_sp); 70 sparc_supply_rwindow(current_regcache, pcb.pcb_sp, -1); 71 supply_register(SPARC64_PC_REGNUM, (char *)&pcb.pcb_pc); 72 pcb.pcb_pc += 4; 73 supply_register(SPARC64_NPC_REGNUM, (char *)&pcb.pcb_pc); 74} 75 76void 77kgdb_trgt_store_registers(int regno __unused) 78{ 79 fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__); 80} 81 82void 83kgdb_trgt_new_objfile(struct objfile *objfile) 84{ 85} 86 87struct kgdb_frame_cache { 88 CORE_ADDR pc; 89 CORE_ADDR sp; 90 CORE_ADDR fp; 91}; 92 93static struct kgdb_frame_cache * 94kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache) 95{ 96 char buf[MAX_REGISTER_SIZE]; 97 struct kgdb_frame_cache *cache; 98 99 cache = *this_cache; 100 if (cache == NULL) { 101 cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache); 102 *this_cache = cache; 103 cache->pc = frame_func_unwind(next_frame); 104 frame_unwind_register(next_frame, SPARC_SP_REGNUM, buf); 105 cache->sp = extract_unsigned_integer(buf, 106 register_size(current_gdbarch, SPARC_SP_REGNUM)); 107 frame_unwind_register(next_frame, SPARC_FP_REGNUM, buf); 108 cache->fp = extract_unsigned_integer(buf, 109 register_size(current_gdbarch, SPARC_FP_REGNUM)); 110 cache->fp += BIAS - sizeof(struct trapframe); 111 } 112 return (cache); 113} 114 115static void 116kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache, 117 struct frame_id *this_id) 118{ 119 struct kgdb_frame_cache *cache; 120 121 cache = kgdb_trgt_frame_cache(next_frame, this_cache); 122 *this_id = frame_id_build(cache->sp, cache->pc); 123} 124 125static void 126kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame, 127 void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp, 128 CORE_ADDR *addrp, int *realnump, void *valuep) 129{ 130 char dummy_valuep[MAX_REGISTER_SIZE]; 131 struct kgdb_frame_cache *cache; 132 int ofs, regsz; 133 134 regsz = register_size(current_gdbarch, regnum); 135 136 if (valuep == NULL) 137 valuep = dummy_valuep; 138 memset(valuep, 0, regsz); 139 *optimizedp = 0; 140 *addrp = 0; 141 *lvalp = not_lval; 142 *realnump = -1; 143 144 cache = kgdb_trgt_frame_cache(next_frame, this_cache); 145 146 switch (regnum) { 147 case SPARC_SP_REGNUM: 148 ofs = offsetof(struct trapframe, tf_sp); 149 break; 150 case SPARC64_PC_REGNUM: 151 ofs = offsetof(struct trapframe, tf_tpc); 152 break; 153 case SPARC64_NPC_REGNUM: 154 ofs = offsetof(struct trapframe, tf_tnpc); 155 break; 156 case SPARC_O0_REGNUM: 157 case SPARC_O1_REGNUM: 158 case SPARC_O2_REGNUM: 159 case SPARC_O3_REGNUM: 160 case SPARC_O4_REGNUM: 161 case SPARC_O5_REGNUM: 162 case SPARC_O7_REGNUM: 163 ofs = offsetof(struct trapframe, tf_out) + 164 (regnum - SPARC_O0_REGNUM) * 8; 165 break; 166 default: 167 if (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) { 168 ofs = (regnum - SPARC_L0_REGNUM) * 8; 169 *addrp = cache->sp + BIAS + ofs; 170 *lvalp = lval_memory; 171 target_read_memory(*addrp, valuep, regsz); 172 } 173 return; 174 } 175 176 *addrp = cache->fp + ofs; 177 *lvalp = lval_memory; 178 target_read_memory(*addrp, valuep, regsz); 179} 180 181static const struct frame_unwind kgdb_trgt_trapframe_unwind = { 182 UNKNOWN_FRAME, 183 &kgdb_trgt_trapframe_this_id, 184 &kgdb_trgt_trapframe_prev_register 185}; 186 187const struct frame_unwind * 188kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame) 189{ 190 char *pname; 191 CORE_ADDR pc; 192 193 pc = frame_func_unwind(next_frame); 194 pname = NULL; 195 find_pc_partial_function(pc, &pname, NULL, NULL); 196 if (pname == NULL) 197 return (NULL); 198 if (strcmp(pname, "tl0_intr") == 0 || 199 strcmp(pname, "tl0_trap") == 0 || 200 strcmp(pname, "tl1_intr") == 0 || 201 strcmp(pname, "tl1_trap") == 0) 202 return (&kgdb_trgt_trapframe_unwind); 203 /* printf("%s: %lx =%s\n", __func__, pc, pname); */ 204 return (NULL); 205} 206