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https://github.com/darlinghq/darling-gdb.git
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115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/*
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* Copyright (c) 1983, 1993, 1998
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* The Regents of the University of California. 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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* 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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "gprof.h"
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#include "search_list.h"
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#include "source.h"
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#include "symtab.h"
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#include "cg_arcs.h"
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#include "corefile.h"
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#include "hist.h"
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static Sym indirect_child;
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void mips_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
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void
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mips_find_call (parent, p_lowpc, p_highpc)
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Sym *parent;
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bfd_vma p_lowpc;
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bfd_vma p_highpc;
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{
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bfd_vma pc, dest_pc;
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unsigned int op;
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int offset;
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Sym *child;
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static boolean inited = false;
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if (!inited)
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{
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inited = true;
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sym_init (&indirect_child);
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indirect_child.name = _("<indirect child>");
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indirect_child.cg.prop.fract = 1.0;
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indirect_child.cg.cyc.head = &indirect_child;
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}
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if (!core_text_space)
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{
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return;
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}
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if (p_lowpc < s_lowpc)
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{
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p_lowpc = s_lowpc;
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}
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if (p_highpc > s_highpc)
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{
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p_highpc = s_highpc;
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}
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DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
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parent->name, (unsigned long) p_lowpc,
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(unsigned long) p_highpc));
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for (pc = p_lowpc; pc < p_highpc; pc += 4)
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{
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op = bfd_get_32 (core_bfd, &((char *)core_text_space)[pc - s_lowpc]);
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if ((op & 0xfc000000) == 0x0c000000)
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{
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/* This is a "jal" instruction. Check that the destination
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is the address of a function. */
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DBG (CALLDEBUG,
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printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc));
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offset = (op & 0x03ffffff) << 2;
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dest_pc = (pc & ~(bfd_vma) 0xfffffff) | offset;
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if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
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{
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child = sym_lookup (&symtab, dest_pc);
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DBG (CALLDEBUG,
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printf (" 0x%lx\t; name=%s, addr=0x%lx",
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(unsigned long) dest_pc, child->name,
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(unsigned long) child->addr));
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if (child->addr == dest_pc)
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{
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DBG (CALLDEBUG, printf ("\n"));
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/* a hit: */
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arc_add (parent, child, (unsigned long) 0);
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continue;
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}
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}
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/* Something funny going on. */
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DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
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}
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else if ((op & 0xfc00f83f) == 0x0000f809)
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{
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/* This is a "jalr" instruction (indirect call). */
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DBG (CALLDEBUG,
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printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc));
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arc_add (parent, &indirect_child, (unsigned long) 0);
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}
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}
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}
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