diff options
| author | Thorsten Lockert <tholo@cvs.openbsd.org> | 1996-10-02 02:59:51 +0000 |
|---|---|---|
| committer | Thorsten Lockert <tholo@cvs.openbsd.org> | 1996-10-02 02:59:51 +0000 |
| commit | 36ae36319d92202d4c1d7634d20ab3dcc402e907 (patch) | |
| tree | 1dd176e17be7e447ebc7bf06b21254eccc37e73e /usr.bin/gprof/i386.c | |
| parent | fdfd0e2d2493cfee377e69f3468092370c9043f2 (diff) | |
Support for call graph detection using the -c options on i386
Diffstat (limited to 'usr.bin/gprof/i386.c')
| -rw-r--r-- | usr.bin/gprof/i386.c | 55 |
1 files changed, 53 insertions, 2 deletions
diff --git a/usr.bin/gprof/i386.c b/usr.bin/gprof/i386.c index ab3f51d0c2c..250852b167f 100644 --- a/usr.bin/gprof/i386.c +++ b/usr.bin/gprof/i386.c @@ -1,12 +1,14 @@ -/* $OpenBSD: i386.c,v 1.2 1996/06/26 05:33:52 deraadt Exp $ */ +/* $OpenBSD: i386.c,v 1.3 1996/10/02 02:59:50 tholo Exp $ */ /* $NetBSD: i386.c,v 1.5 1995/04/19 07:16:04 cgd Exp $ */ #ifndef lint -static char rcsid[] = "$OpenBSD: i386.c,v 1.2 1996/06/26 05:33:52 deraadt Exp $"; +static char rcsid[] = "$OpenBSD: i386.c,v 1.3 1996/10/02 02:59:50 tholo Exp $"; #endif /* not lint */ #include "gprof.h" +#define iscall(pc) ((*pc) == 0xE8) + /* * gprof -c isn't currently supported... */ @@ -15,4 +17,53 @@ findcall( parentp , p_lowpc , p_highpc ) unsigned long p_lowpc; unsigned long p_highpc; { + unsigned char *pc; + long len; + nltype *childp; + unsigned long destpc; + + if (textspace == 0) + return; + if (p_lowpc < s_lowpc) + p_lowpc = s_lowpc; + if (p_highpc > s_highpc) + p_highpc = s_highpc; +# ifdef DEBUG + if ( debug & CALLDEBUG ) { + printf( "[findcall] %s: 0x%x to 0x%x\n" , + parentp -> name , p_lowpc , p_highpc ); + } +# endif DEBUG + for (pc = textspace + p_lowpc - N_TXTADDR(xbuf) ; pc < textspace + p_highpc - N_TXTADDR(xbuf) ; pc += len) { + len = 1; + if (iscall(pc)) { + destpc = *(unsigned long *)(pc + 1) + (pc - textspace + N_TXTADDR(xbuf)) + 5; +# ifdef DEBUG + if ( debug & CALLDEBUG ) { + printf( "[findcall]\t0x%x:calls" , pc - textspace ); + printf( "\tdestpc 0x%x" , destpc ); + } +# endif DEBUG + if (destpc >= s_lowpc && destpc <= s_highpc) { + childp = nllookup(destpc); +# ifdef DEBUG + if ( debug & CALLDEBUG ) { + printf( " childp->name %s" , childp -> name ); + printf( " childp->value 0x%x\n" , + childp -> value ); + } +# endif DEBUG + if (childp != NULL && childp->value == destpc) { + addarc(parentp, childp, 0L); + len += 4; + continue; + } + } +# ifdef DEBUG + if ( debug & CALLDEBUG ) { + printf( "\tbut it's a botch\n" ); + } +# endif DEBUG + } + } } |