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Diffstat (limited to 'gprof/mips.c')
| -rw-r--r-- | gprof/mips.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/gprof/mips.c b/gprof/mips.c new file mode 100644 index 0000000..1d05052 --- /dev/null +++ b/gprof/mips.c @@ -0,0 +1,102 @@ +/* + * Copyright (c) 1983, 1998 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that: (1) source distributions retain this entire copyright + * notice and comment, and (2) distributions including binaries display + * the following acknowledgement: ``This product includes software + * developed by the University of California, Berkeley and its contributors'' + * in the documentation or other materials provided with the distribution + * and in all advertising materials mentioning features or use of this + * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ +#include "gprof.h" +#include "cg_arcs.h" +#include "corefile.h" +#include "hist.h" +#include "symtab.h" + +static Sym indirect_child; + +void mips_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); + +void +mips_find_call (parent, p_lowpc, p_highpc) + Sym *parent; + bfd_vma p_lowpc; + bfd_vma p_highpc; +{ + bfd_vma pc, dest_pc; + unsigned int op; + int offset; + Sym *child; + static bool inited = FALSE; + + if (!inited) + { + inited = TRUE; + sym_init (&indirect_child); + indirect_child.name = _("<indirect child>"); + indirect_child.cg.prop.fract = 1.0; + indirect_child.cg.cyc.head = &indirect_child; + } + + if (!core_text_space) + { + return; + } + if (p_lowpc < s_lowpc) + { + p_lowpc = s_lowpc; + } + if (p_highpc > s_highpc) + { + p_highpc = s_highpc; + } + 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) + { + op = bfd_get_32 (core_bfd, &((char *)core_text_space)[pc - s_lowpc]); + if ((op & 0xfc000000) == 0x0c000000) + { + /* This is a "jal" instruction. Check that the destination + is the address of a function. */ + DBG (CALLDEBUG, + printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc)); + offset = (op & 0x03ffffff) << 2; + dest_pc = (pc & ~0xfffffff) | offset; + if (dest_pc >= s_lowpc && dest_pc <= s_highpc) + { + child = sym_lookup (&symtab, dest_pc); + DBG (CALLDEBUG, + printf (" 0x%lx\t; name=%s, addr=0x%lx", + (unsigned long) dest_pc, child->name, + (unsigned long) child->addr)); + if (child->addr == dest_pc) + { + DBG (CALLDEBUG, printf ("\n")); + /* a hit: */ + arc_add (parent, child, (unsigned long) 0); + continue; + } + } + /* Something funny going on. */ + DBG (CALLDEBUG, printf ("\tbut it's a botch\n")); + } + else if ((op & 0xfc00f83f) == 0x0000f809) + { + /* This is a "jalr" instruction (indirect call). */ + DBG (CALLDEBUG, + printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc)); + arc_add (parent, &indirect_child, (unsigned long) 0); + } + } +} |