| 1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that: (1) source distributions retain this entire copyright |
| 7 | * notice and comment, and (2) distributions including binaries display |
| 8 | * the following acknowledgement: ``This product includes software |
| 9 | * developed by the University of California, Berkeley and its contributors'' |
| 10 | * in the documentation or other materials provided with the distribution |
| 11 | * and in all advertising materials mentioning features or use of this |
| 12 | * software. Neither the name of the University nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 18 | */ |
| 19 | #include "gprof.h" |
| 20 | #include "cg_arcs.h" |
| 21 | #include "core.h" |
| 22 | #include "hist.h" |
| 23 | #include "symtab.h" |
| 24 | |
| 25 | |
| 26 | int |
| 27 | DEFUN (iscall, (ip), unsigned char *ip) |
| 28 | { |
| 29 | if (*ip == 0xeb || *ip == 0x9a) |
| 30 | return 1; |
| 31 | return 0; |
| 32 | } |
| 33 | |
| 34 | |
| 35 | void |
| 36 | find_call (parent, p_lowpc, p_highpc) |
| 37 | Sym *parent; |
| 38 | bfd_vma p_lowpc; |
| 39 | bfd_vma p_highpc; |
| 40 | { |
| 41 | unsigned char *instructp; |
| 42 | long length; |
| 43 | Sym *child; |
| 44 | bfd_vma destpc; |
| 45 | |
| 46 | if (core_text_space == 0) |
| 47 | { |
| 48 | return; |
| 49 | } |
| 50 | if (p_lowpc < s_lowpc) |
| 51 | { |
| 52 | p_lowpc = s_lowpc; |
| 53 | } |
| 54 | if (p_highpc > s_highpc) |
| 55 | { |
| 56 | p_highpc = s_highpc; |
| 57 | } |
| 58 | DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n", |
| 59 | parent->name, p_lowpc, p_highpc)); |
| 60 | for (instructp = (unsigned char *) core_text_space + p_lowpc; |
| 61 | instructp < (unsigned char *) core_text_space + p_highpc; |
| 62 | instructp += length) |
| 63 | { |
| 64 | length = 1; |
| 65 | if (iscall (instructp)) |
| 66 | { |
| 67 | DBG (CALLDEBUG, |
| 68 | printf ("[findcall]\t0x%x:callf", |
| 69 | instructp - (unsigned char *) core_text_space)); |
| 70 | length = 4; |
| 71 | /* |
| 72 | * regular pc relative addressing |
| 73 | * check that this is the address of |
| 74 | * a function. |
| 75 | */ |
| 76 | destpc = ((bfd_vma) instructp + 5 - (bfd_vma) core_text_space); |
| 77 | if (destpc >= s_lowpc && destpc <= s_highpc) |
| 78 | { |
| 79 | child = sym_lookup (&symtab, destpc); |
| 80 | DBG (CALLDEBUG, |
| 81 | printf ("[findcall]\tdestpc 0x%lx", destpc); |
| 82 | printf (" child->name %s", child->name); |
| 83 | printf (" child->addr 0x%lx\n", child->addr); |
| 84 | ); |
| 85 | if (child->addr == destpc) |
| 86 | { |
| 87 | /* |
| 88 | * a hit |
| 89 | */ |
| 90 | arc_add (parent, child, (long) 0); |
| 91 | length += 4; /* constant lengths */ |
| 92 | continue; |
| 93 | } |
| 94 | goto botched; |
| 95 | } |
| 96 | /* |
| 97 | * else: |
| 98 | * it looked like a callf, |
| 99 | * but it wasn't to anywhere. |
| 100 | */ |
| 101 | botched: |
| 102 | /* |
| 103 | * something funny going on. |
| 104 | */ |
| 105 | DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n")); |
| 106 | length = 1; |
| 107 | continue; |
| 108 | } |
| 109 | } |
| 110 | } |