219 lines
5.8 KiB
C
219 lines
5.8 KiB
C
/*
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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/asm.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 <sparc-tdep.h>
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#include <sparc64-tdep.h>
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#include "kgdb.h"
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CORE_ADDR
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kgdb_trgt_core_pcb(u_int cpuid)
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{
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return (kgdb_trgt_stop_pcb(cpuid, sizeof(struct pcb)));
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}
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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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kt = kgdb_thr_lookup_tid(ptid_get_pid(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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supply_register(SPARC_SP_REGNUM, (char *)&pcb.pcb_sp);
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sparc_supply_rwindow(current_regcache, pcb.pcb_sp, -1);
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supply_register(SPARC64_PC_REGNUM, (char *)&pcb.pcb_pc);
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pcb.pcb_pc += 4;
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supply_register(SPARC64_NPC_REGNUM, (char *)&pcb.pcb_pc);
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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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void
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kgdb_trgt_new_objfile(struct objfile *objfile)
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{
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}
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struct kgdb_frame_cache {
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CORE_ADDR pc;
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CORE_ADDR sp;
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CORE_ADDR fp;
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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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cache->pc = frame_func_unwind(next_frame);
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frame_unwind_register(next_frame, SPARC_SP_REGNUM, buf);
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cache->sp = extract_unsigned_integer(buf,
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register_size(current_gdbarch, SPARC_SP_REGNUM));
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frame_unwind_register(next_frame, SPARC_FP_REGNUM, buf);
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cache->fp = extract_unsigned_integer(buf,
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register_size(current_gdbarch, SPARC_FP_REGNUM));
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cache->fp += BIAS - sizeof(struct trapframe);
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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->sp, cache->pc);
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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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cache = kgdb_trgt_frame_cache(next_frame, this_cache);
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switch (regnum) {
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case SPARC_SP_REGNUM:
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ofs = offsetof(struct trapframe, tf_sp);
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break;
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case SPARC64_PC_REGNUM:
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ofs = offsetof(struct trapframe, tf_tpc);
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break;
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case SPARC64_NPC_REGNUM:
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ofs = offsetof(struct trapframe, tf_tnpc);
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break;
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case SPARC_O0_REGNUM:
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case SPARC_O1_REGNUM:
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case SPARC_O2_REGNUM:
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case SPARC_O3_REGNUM:
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case SPARC_O4_REGNUM:
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case SPARC_O5_REGNUM:
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case SPARC_O7_REGNUM:
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ofs = offsetof(struct trapframe, tf_out) +
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(regnum - SPARC_O0_REGNUM) * 8;
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break;
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default:
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if (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) {
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ofs = (regnum - SPARC_L0_REGNUM) * 8;
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*addrp = cache->sp + BIAS + 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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return;
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}
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*addrp = cache->fp + 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_func_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, "tl0_intr") == 0 ||
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strcmp(pname, "tl0_trap") == 0 ||
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strcmp(pname, "tl1_intr") == 0 ||
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strcmp(pname, "tl1_trap") == 0)
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return (&kgdb_trgt_trapframe_unwind);
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/* printf("%s: %lx =%s\n", __func__, pc, pname); */
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return (NULL);
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}
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/*
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* This function ensures, that the PC is inside the
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* function section which is understood by GDB.
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*
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* Return 0 when fixup is necessary, -1 otherwise.
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*/
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int
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kgdb_trgt_pc_fixup(CORE_ADDR *pc __unused)
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{
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return (-1);
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}
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