trgt_arm.c revision 276190
1160581Sobrien/* 2160581Sobrien * Copyright (c) 2004 Marcel Moolenaar 3160581Sobrien * All rights reserved. 4160581Sobrien * 5160581Sobrien * Redistribution and use in source and binary forms, with or without 6160581Sobrien * modification, are permitted provided that the following conditions 7160581Sobrien * are met: 8160581Sobrien * 9160581Sobrien * 1. Redistributions of source code must retain the above copyright 10160581Sobrien * notice, this list of conditions and the following disclaimer. 11160581Sobrien * 2. Redistributions in binary form must reproduce the above copyright 12160581Sobrien * notice, this list of conditions and the following disclaimer in the 13160581Sobrien * documentation and/or other materials provided with the distribution. 14160581Sobrien * 15160581Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 16160581Sobrien * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17160581Sobrien * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18160581Sobrien * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 19160581Sobrien * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20160581Sobrien * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21160581Sobrien * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22160581Sobrien * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23160581Sobrien * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24160581Sobrien * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25160581Sobrien */ 26160581Sobrien 27160581Sobrien#include <sys/cdefs.h> 28160581Sobrien__FBSDID("$FreeBSD: head/gnu/usr.bin/gdb/kgdb/trgt_arm.c 276190 2014-12-24 18:54:31Z ian $"); 29160581Sobrien 30160581Sobrien#include <sys/types.h> 31162303Simp#ifndef CROSS_DEBUGGER 32160581Sobrien#include <machine/pcb.h> 33160581Sobrien#include <machine/frame.h> 34162303Simp#include <machine/armreg.h> 35162303Simp#endif 36160581Sobrien#include <err.h> 37160581Sobrien#include <kvm.h> 38160581Sobrien#include <string.h> 39160581Sobrien 40160581Sobrien#include <defs.h> 41160581Sobrien#include <target.h> 42160581Sobrien#include <gdbthread.h> 43160581Sobrien#include <inferior.h> 44160581Sobrien#include <regcache.h> 45160581Sobrien#include <frame-unwind.h> 46160581Sobrien#include <arm-tdep.h> 47160581Sobrien 48160581Sobrien#include "kgdb.h" 49160581Sobrien 50246893SmarcelCORE_ADDR 51246893Smarcelkgdb_trgt_core_pcb(u_int cpuid) 52246893Smarcel{ 53261788Sjmg#ifndef CROSS_DEBUGGER 54246893Smarcel return (kgdb_trgt_stop_pcb(cpuid, sizeof(struct pcb))); 55261788Sjmg#else 56261788Sjmg return -1; 57261788Sjmg#endif 58246893Smarcel} 59246893Smarcel 60160581Sobrienvoid 61160581Sobrienkgdb_trgt_fetch_registers(int regno __unused) 62160581Sobrien{ 63162303Simp#ifndef CROSS_DEBUGGER 64160581Sobrien struct kthr *kt; 65160581Sobrien struct pcb pcb; 66160581Sobrien int i, reg; 67163440Sjhb 68178713Sjhb kt = kgdb_thr_lookup_tid(ptid_get_pid(inferior_ptid)); 69160581Sobrien if (kt == NULL) 70160581Sobrien return; 71160581Sobrien if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) { 72160581Sobrien warnx("kvm_read: %s", kvm_geterr(kvm)); 73160581Sobrien memset(&pcb, 0, sizeof(pcb)); 74160581Sobrien } 75276190Sian for (i = ARM_A1_REGNUM + 4; i <= ARM_SP_REGNUM; i++) { 76276190Sian supply_register(i, (char *)&pcb.pcb_regs.sf_r4 + 77276190Sian (i - (ARM_A1_REGNUM + 4 )) * 4); 78160581Sobrien } 79276190Sian if (pcb.pcb_regs.sf_sp != 0) { 80276190Sian if (kvm_read(kvm, pcb.pcb_regs.sf_sp + 4 * 4, ®, 4) != 4) 81160581Sobrien warnx("kvm_read :%s", kvm_geterr(kvm)); 82160581Sobrien else 83160581Sobrien supply_register(ARM_PC_REGNUM, (char *)®); 84160581Sobrien } 85162303Simp#endif 86160581Sobrien} 87160581Sobrien 88160581Sobrienvoid 89160581Sobrienkgdb_trgt_store_registers(int regno __unused) 90160581Sobrien{ 91160581Sobrien fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__); 92160581Sobrien} 93160581Sobrien 94178670Sjhbvoid 95178670Sjhbkgdb_trgt_new_objfile(struct objfile *objfile) 96178670Sjhb{ 97178670Sjhb} 98178670Sjhb 99162303Simp#ifndef CROSS_DEBUGGER 100160581Sobrienstruct kgdb_frame_cache { 101160581Sobrien CORE_ADDR fp; 102160581Sobrien CORE_ADDR sp; 103160581Sobrien}; 104160581Sobrien 105160581Sobrienstatic int kgdb_trgt_frame_offset[26] = { 106160581Sobrien offsetof(struct trapframe, tf_r0), 107160581Sobrien offsetof(struct trapframe, tf_r1), 108160581Sobrien offsetof(struct trapframe, tf_r2), 109160581Sobrien offsetof(struct trapframe, tf_r3), 110160581Sobrien offsetof(struct trapframe, tf_r4), 111160581Sobrien offsetof(struct trapframe, tf_r5), 112160581Sobrien offsetof(struct trapframe, tf_r6), 113160581Sobrien offsetof(struct trapframe, tf_r7), 114160581Sobrien offsetof(struct trapframe, tf_r8), 115160581Sobrien offsetof(struct trapframe, tf_r9), 116160581Sobrien offsetof(struct trapframe, tf_r10), 117160581Sobrien offsetof(struct trapframe, tf_r11), 118160581Sobrien offsetof(struct trapframe, tf_r12), 119160581Sobrien offsetof(struct trapframe, tf_svc_sp), 120160581Sobrien offsetof(struct trapframe, tf_svc_lr), 121160581Sobrien offsetof(struct trapframe, tf_pc), 122160581Sobrien -1, -1, -1, -1, -1, -1, -1, -1, -1, 123160581Sobrien offsetof(struct trapframe, tf_spsr) 124160581Sobrien}; 125160581Sobrien 126160581Sobrienstatic struct kgdb_frame_cache * 127160581Sobrienkgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache) 128160581Sobrien{ 129160581Sobrien char buf[MAX_REGISTER_SIZE]; 130160581Sobrien struct kgdb_frame_cache *cache; 131160581Sobrien 132160581Sobrien cache = *this_cache; 133160581Sobrien if (cache == NULL) { 134160581Sobrien cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache); 135160581Sobrien *this_cache = cache; 136160581Sobrien frame_unwind_register(next_frame, ARM_SP_REGNUM, buf); 137160581Sobrien cache->sp = extract_unsigned_integer(buf, 138160581Sobrien register_size(current_gdbarch, ARM_SP_REGNUM)); 139160581Sobrien frame_unwind_register(next_frame, ARM_FP_REGNUM, buf); 140160581Sobrien cache->fp = extract_unsigned_integer(buf, 141160581Sobrien register_size(current_gdbarch, ARM_FP_REGNUM)); 142160581Sobrien } 143160581Sobrien return (cache); 144160581Sobrien} 145160581Sobrien 146162303Simpstatic int is_undef; 147162303Simp 148160581Sobrienstatic void 149160581Sobrienkgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache, 150160581Sobrien struct frame_id *this_id) 151160581Sobrien{ 152160581Sobrien struct kgdb_frame_cache *cache; 153160581Sobrien 154160581Sobrien cache = kgdb_trgt_frame_cache(next_frame, this_cache); 155160581Sobrien *this_id = frame_id_build(cache->fp, 0); 156160581Sobrien} 157160581Sobrien 158160581Sobrienstatic void 159160581Sobrienkgdb_trgt_trapframe_prev_register(struct frame_info *next_frame, 160160581Sobrien void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp, 161160581Sobrien CORE_ADDR *addrp, int *realnump, void *valuep) 162160581Sobrien{ 163160581Sobrien char dummy_valuep[MAX_REGISTER_SIZE]; 164160581Sobrien struct kgdb_frame_cache *cache; 165160581Sobrien int ofs, regsz; 166162303Simp int is_undefined = 0; 167160581Sobrien 168160581Sobrien regsz = register_size(current_gdbarch, regnum); 169160581Sobrien 170160581Sobrien if (valuep == NULL) 171160581Sobrien valuep = dummy_valuep; 172160581Sobrien memset(valuep, 0, regsz); 173160581Sobrien *optimizedp = 0; 174160581Sobrien *addrp = 0; 175160581Sobrien *lvalp = not_lval; 176160581Sobrien *realnump = -1; 177160581Sobrien 178160581Sobrien ofs = (regnum >= 0 && regnum <= ARM_PS_REGNUM) 179160581Sobrien ? kgdb_trgt_frame_offset[regnum] : -1; 180160581Sobrien if (ofs == -1) 181160581Sobrien return; 182160581Sobrien 183160581Sobrien cache = kgdb_trgt_frame_cache(next_frame, this_cache); 184163440Sjhb 185162303Simp if (is_undef && (regnum == ARM_SP_REGNUM || regnum == ARM_PC_REGNUM)) { 186162303Simp *addrp = cache->sp + offsetof(struct trapframe, tf_spsr); 187162303Simp target_read_memory(*addrp, valuep, regsz); 188162303Simp is_undefined = 1; 189162303Simp ofs = kgdb_trgt_frame_offset[ARM_SP_REGNUM]; 190162303Simp 191162303Simp } 192160581Sobrien *addrp = cache->sp + ofs; 193160581Sobrien *lvalp = lval_memory; 194160581Sobrien target_read_memory(*addrp, valuep, regsz); 195162303Simp 196162303Simp if (is_undefined) { 197162303Simp *addrp = *(unsigned int *)valuep + (regnum == ARM_SP_REGNUM ? 198162303Simp 0 : 8); 199162303Simp target_read_memory(*addrp, valuep, regsz); 200162303Simp 201162303Simp } 202160581Sobrien} 203160581Sobrien 204160581Sobrienstatic const struct frame_unwind kgdb_trgt_trapframe_unwind = { 205160581Sobrien UNKNOWN_FRAME, 206160581Sobrien &kgdb_trgt_trapframe_this_id, 207160581Sobrien &kgdb_trgt_trapframe_prev_register 208160581Sobrien}; 209162303Simp#endif 210160581Sobrien 211160581Sobrienconst struct frame_unwind * 212160581Sobrienkgdb_trgt_trapframe_sniffer(struct frame_info *next_frame) 213160581Sobrien{ 214162303Simp#ifndef CROSS_DEBUGGER 215160581Sobrien char *pname; 216160581Sobrien CORE_ADDR pc; 217160581Sobrien 218160581Sobrien pc = frame_pc_unwind(next_frame); 219160581Sobrien pname = NULL; 220160581Sobrien find_pc_partial_function(pc, &pname, NULL, NULL); 221162303Simp if (pname == NULL) { 222162303Simp is_undef = 0; 223160581Sobrien return (NULL); 224162303Simp } 225162303Simp if (!strcmp(pname, "undefinedinstruction")) 226162303Simp is_undef = 1; 227160581Sobrien if (strcmp(pname, "Laddress_exception_entry") == 0 || 228160581Sobrien strcmp(pname, "undefined_entry") == 0 || 229160581Sobrien strcmp(pname, "exception_exit") == 0 || 230162303Simp strcmp(pname, "Laddress_exception_msg") == 0 || 231160581Sobrien strcmp(pname, "irq_entry") == 0) 232160581Sobrien return (&kgdb_trgt_trapframe_unwind); 233162303Simp if (!strcmp(pname, "undefinedinstruction")) 234162303Simp is_undef = 1; 235162303Simp else 236162303Simp is_undef = 0; 237162303Simp#endif 238160581Sobrien return (NULL); 239160581Sobrien} 240