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 49void 50kgdb_trgt_fetch_registers(int regno __unused) 51{ 52 struct kthr *kt; 53 struct pcb pcb; 54 55 kt = kgdb_thr_lookup_tid(ptid_get_pid(inferior_ptid)); 56 if (kt == NULL) 57 return; 58 if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) { 59 warnx("kvm_read: %s", kvm_geterr(kvm)); 60 memset(&pcb, 0, sizeof(pcb)); 61 } 62 63 supply_register(SPARC_SP_REGNUM, (char *)&pcb.pcb_sp); 64 sparc_supply_rwindow(current_regcache, pcb.pcb_sp, -1); 65 supply_register(SPARC64_PC_REGNUM, (char *)&pcb.pcb_pc); 66 pcb.pcb_pc += 4; 67 supply_register(SPARC64_NPC_REGNUM, (char *)&pcb.pcb_pc); 68} 69 70void 71kgdb_trgt_store_registers(int regno __unused) 72{ 73 fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__); 74} 75 76void 77kgdb_trgt_new_objfile(struct objfile *objfile) 78{ 79} 80 81struct kgdb_frame_cache { 82 CORE_ADDR pc; 83 CORE_ADDR sp; 84 CORE_ADDR fp; 85}; 86 87static struct kgdb_frame_cache * 88kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache) 89{ 90 char buf[MAX_REGISTER_SIZE]; 91 struct kgdb_frame_cache *cache; 92 93 cache = *this_cache; 94 if (cache == NULL) { 95 cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache); 96 *this_cache = cache; 97 cache->pc = frame_func_unwind(next_frame); 98 frame_unwind_register(next_frame, SPARC_SP_REGNUM, buf); 99 cache->sp = extract_unsigned_integer(buf, 100 register_size(current_gdbarch, SPARC_SP_REGNUM)); 101 frame_unwind_register(next_frame, SPARC_FP_REGNUM, buf); 102 cache->fp = extract_unsigned_integer(buf, 103 register_size(current_gdbarch, SPARC_FP_REGNUM)); 104 cache->fp += BIAS - sizeof(struct trapframe); 105 } 106 return (cache); 107} 108 109static void 110kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache, 111 struct frame_id *this_id) 112{ 113 struct kgdb_frame_cache *cache; 114 115 cache = kgdb_trgt_frame_cache(next_frame, this_cache); 116 *this_id = frame_id_build(cache->sp, cache->pc); 117} 118 119static void 120kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame, 121 void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp, 122 CORE_ADDR *addrp, int *realnump, void *valuep) 123{ 124 char dummy_valuep[MAX_REGISTER_SIZE]; 125 struct kgdb_frame_cache *cache; 126 int ofs, regsz; 127 128 regsz = register_size(current_gdbarch, regnum); 129 130 if (valuep == NULL) 131 valuep = dummy_valuep; 132 memset(valuep, 0, regsz); 133 *optimizedp = 0; 134 *addrp = 0; 135 *lvalp = not_lval; 136 *realnump = -1; 137 138 cache = kgdb_trgt_frame_cache(next_frame, this_cache); 139 140 switch (regnum) { 141 case SPARC_SP_REGNUM: 142 ofs = offsetof(struct trapframe, tf_sp); 143 break; 144 case SPARC64_PC_REGNUM: 145 ofs = offsetof(struct trapframe, tf_tpc); 146 break; 147 case SPARC64_NPC_REGNUM: 148 ofs = offsetof(struct trapframe, tf_tnpc); 149 break; 150 case SPARC_O0_REGNUM: 151 case SPARC_O1_REGNUM: 152 case SPARC_O2_REGNUM: 153 case SPARC_O3_REGNUM: 154 case SPARC_O4_REGNUM: 155 case SPARC_O5_REGNUM: 156 case SPARC_O7_REGNUM: 157 ofs = offsetof(struct trapframe, tf_out) + 158 (regnum - SPARC_O0_REGNUM) * 8; 159 break; 160 default: 161 if (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) { 162 ofs = (regnum - SPARC_L0_REGNUM) * 8; 163 *addrp = cache->sp + BIAS + ofs; 164 *lvalp = lval_memory; 165 target_read_memory(*addrp, valuep, regsz); 166 } 167 return; 168 } 169 170 *addrp = cache->fp + ofs; 171 *lvalp = lval_memory; 172 target_read_memory(*addrp, valuep, regsz); 173} 174 175static const struct frame_unwind kgdb_trgt_trapframe_unwind = { 176 UNKNOWN_FRAME, 177 &kgdb_trgt_trapframe_this_id, 178 &kgdb_trgt_trapframe_prev_register 179}; 180 181const struct frame_unwind * 182kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame) 183{ 184 char *pname; 185 CORE_ADDR pc; 186 187 pc = frame_func_unwind(next_frame); 188 pname = NULL; 189 find_pc_partial_function(pc, &pname, NULL, NULL); 190 if (pname == NULL) 191 return (NULL); 192 if (strcmp(pname, "tl0_intr") == 0 || 193 strcmp(pname, "tl0_trap") == 0 || 194 strcmp(pname, "tl1_intr") == 0 || 195 strcmp(pname, "tl1_trap") == 0) 196 return (&kgdb_trgt_trapframe_unwind); 197 /* printf("%s: %lx =%s\n", __func__, pc, pname); */ 198 return (NULL); 199} 200