Add initial platform support.
Submitted by: cognet
This commit is contained in:
obrien
parent
ec64bbcbdf
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100c4dc194
196
gnu/usr.bin/gdb/kgdb/trgt_arm.c
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196
gnu/usr.bin/gdb/kgdb/trgt_arm.c
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/*
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* Copyright (c) 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <machine/pcb.h>
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#include <machine/frame.h>
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#include <err.h>
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#include <kvm.h>
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#include <string.h>
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#include <defs.h>
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#include <target.h>
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#include <gdbthread.h>
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#include <inferior.h>
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#include <regcache.h>
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#include <frame-unwind.h>
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#include <arm-tdep.h>
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#include "kgdb.h"
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void
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kgdb_trgt_fetch_registers(int regno __unused)
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{
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struct kthr *kt;
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struct pcb pcb;
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int i, reg;
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kt = kgdb_thr_lookup_tid(ptid_get_tid(inferior_ptid));
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if (kt == NULL)
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return;
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if (kvm_read(kvm, kt->pcb, &pcb, sizeof(pcb)) != sizeof(pcb)) {
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warnx("kvm_read: %s", kvm_geterr(kvm));
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memset(&pcb, 0, sizeof(pcb));
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}
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for (i = ARM_A1_REGNUM + 8; i <= ARM_SP_REGNUM; i++) {
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supply_register(i, (char *)&pcb.un_32.pcb32_r8 +
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(i - (ARM_A1_REGNUM + 8 )) * 4);
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}
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if (pcb.un_32.pcb32_sp != 0) {
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for (i = 0; i < 4; i++) {
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if (kvm_read(kvm, pcb.un_32.pcb32_sp + (i) * 4,
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®, 4) != 4) {
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warnx("kvm_read: %s", kvm_geterr(kvm));
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break;
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}
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supply_register(ARM_A1_REGNUM + 4 + i, (char *)®);
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}
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if (kvm_read(kvm, pcb.un_32.pcb32_sp + 4 * 4, ®, 4) != 4)
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warnx("kvm_read :%s", kvm_geterr(kvm));
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else
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supply_register(ARM_PC_REGNUM, (char *)®);
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}
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}
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void
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kgdb_trgt_store_registers(int regno __unused)
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{
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fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__);
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}
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struct kgdb_frame_cache {
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CORE_ADDR fp;
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CORE_ADDR sp;
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};
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static int kgdb_trgt_frame_offset[26] = {
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offsetof(struct trapframe, tf_r0),
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offsetof(struct trapframe, tf_r1),
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offsetof(struct trapframe, tf_r2),
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offsetof(struct trapframe, tf_r3),
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offsetof(struct trapframe, tf_r4),
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offsetof(struct trapframe, tf_r5),
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offsetof(struct trapframe, tf_r6),
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offsetof(struct trapframe, tf_r7),
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offsetof(struct trapframe, tf_r8),
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offsetof(struct trapframe, tf_r9),
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offsetof(struct trapframe, tf_r10),
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offsetof(struct trapframe, tf_r11),
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offsetof(struct trapframe, tf_r12),
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offsetof(struct trapframe, tf_svc_sp),
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offsetof(struct trapframe, tf_svc_lr),
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offsetof(struct trapframe, tf_pc),
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-1, -1, -1, -1, -1, -1, -1, -1, -1,
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offsetof(struct trapframe, tf_spsr)
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};
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static struct kgdb_frame_cache *
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kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
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{
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char buf[MAX_REGISTER_SIZE];
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struct kgdb_frame_cache *cache;
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cache = *this_cache;
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if (cache == NULL) {
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cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache);
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*this_cache = cache;
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frame_unwind_register(next_frame, ARM_SP_REGNUM, buf);
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cache->sp = extract_unsigned_integer(buf,
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register_size(current_gdbarch, ARM_SP_REGNUM));
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frame_unwind_register(next_frame, ARM_FP_REGNUM, buf);
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cache->fp = extract_unsigned_integer(buf,
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register_size(current_gdbarch, ARM_FP_REGNUM));
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}
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return (cache);
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}
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static void
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kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache,
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struct frame_id *this_id)
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{
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struct kgdb_frame_cache *cache;
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cache = kgdb_trgt_frame_cache(next_frame, this_cache);
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*this_id = frame_id_build(cache->fp, 0);
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}
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static void
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kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
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void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp,
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CORE_ADDR *addrp, int *realnump, void *valuep)
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{
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char dummy_valuep[MAX_REGISTER_SIZE];
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struct kgdb_frame_cache *cache;
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int ofs, regsz;
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regsz = register_size(current_gdbarch, regnum);
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if (valuep == NULL)
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valuep = dummy_valuep;
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memset(valuep, 0, regsz);
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*optimizedp = 0;
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*addrp = 0;
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*lvalp = not_lval;
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*realnump = -1;
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ofs = (regnum >= 0 && regnum <= ARM_PS_REGNUM)
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? kgdb_trgt_frame_offset[regnum] : -1;
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if (ofs == -1)
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return;
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cache = kgdb_trgt_frame_cache(next_frame, this_cache);
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*addrp = cache->sp + ofs;
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*lvalp = lval_memory;
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target_read_memory(*addrp, valuep, regsz);
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}
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static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
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UNKNOWN_FRAME,
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&kgdb_trgt_trapframe_this_id,
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&kgdb_trgt_trapframe_prev_register
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};
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const struct frame_unwind *
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kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
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{
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char *pname;
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CORE_ADDR pc;
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pc = frame_pc_unwind(next_frame);
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pname = NULL;
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find_pc_partial_function(pc, &pname, NULL, NULL);
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if (pname == NULL)
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return (NULL);
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if (strcmp(pname, "Laddress_exception_entry") == 0 ||
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strcmp(pname, "undefined_entry") == 0 ||
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strcmp(pname, "exception_exit") == 0 ||
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strcmp(pname, "irq_entry") == 0)
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return (&kgdb_trgt_trapframe_unwind);
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return (NULL);
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}
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