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Diffstat (limited to 'gprof/aarch64.c')
| -rw-r--r-- | gprof/aarch64.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/gprof/aarch64.c b/gprof/aarch64.c new file mode 100644 index 0000000..4187d97 --- /dev/null +++ b/gprof/aarch64.c @@ -0,0 +1,99 @@ +/* Gprof -c option support for AArch64. + Copyright 2013 Linaro Ltd. + + Based upon gprof/i386.c. + + Copyright (c) 1983, 1993, 2001 + The Regents of the University of California. All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + 3. Neither the name of the University nor the names of its contributors + may be used to endorse or promote products derived from this software + without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + SUCH DAMAGE. */ + +#include "gprof.h" +#include "search_list.h" +#include "source.h" +#include "symtab.h" +#include "cg_arcs.h" +#include "corefile.h" +#include "hist.h" + +#define BRANCH_MASK 0x7c000000 +#define BRANCH_PATTERN 0x14000000 + +void aarch64_find_call (Sym *, bfd_vma, bfd_vma); + +void +aarch64_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc) +{ + bfd_vma pc, dest_pc, offset; + unsigned int insn; + Sym *child; + + DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n", + parent->name, (unsigned long) p_lowpc, + (unsigned long) p_highpc)); + + for (pc = p_lowpc; pc < p_highpc; pc += 4) + { + + insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space + + pc - core_text_sect->vma)); + + if ((insn & BRANCH_MASK) == BRANCH_PATTERN) + { + DBG (CALLDEBUG, + printf ("[find_call] 0x%lx: bl", (unsigned long) pc)); + + /* Regular pc relative addressing check that this is the + address of a function. */ + offset = (((insn & 0x3ffffff) ^ 0x2000000) - 0x2000000) << 2; + + dest_pc = pc + offset; + + if (hist_check_address (dest_pc)) + { + child = sym_lookup (&symtab, dest_pc); + + if (child) + { + DBG (CALLDEBUG, + printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n", + (unsigned long) dest_pc, child->name, + (unsigned long) child->addr)); + + if (child->addr == dest_pc) + { + /* a hit. */ + arc_add (parent, child, (unsigned long) 0); + continue; + } + } + } + + /* Something funny going on. */ + DBG (CALLDEBUG, printf ("\tbut it's a botch\n")); + } + } +} |