C-startup routines for generic m68k machines, with shared library support.
This commit is contained in:
paulus
parent
75f98f5632
commit
156ee99921
|
|
@ -0,0 +1,35 @@
|
|||
# from: @(#)Makefile 5.6 (Berkeley) 5/22/91
|
||||
# $Id: Makefile,v 1.1 1993/11/25 23:22:41 paulus Exp $
|
||||
|
||||
CFLAGS+= -DLIBC_SCCS -DDYNAMIC
|
||||
OBJS= crt0.o gcrt0.o
|
||||
CLEANFILES+= gmon.o moncrt0.o core a.out
|
||||
|
||||
all: ${OBJS}
|
||||
|
||||
crt0.o: crt0.c
|
||||
${CC} ${CFLAGS} -c -DCRT0 ${.ALLSRC}
|
||||
${LD} -x -r ${.TARGET}
|
||||
mv a.out ${.TARGET}
|
||||
|
||||
moncrt0.o: crt0.c
|
||||
${CC} ${CFLAGS} -c -DMCRT0 ${.ALLSRC} -o ${.TARGET}
|
||||
${LD} -x -r ${.TARGET}
|
||||
mv a.out ${.TARGET}
|
||||
|
||||
gcrt0.o: moncrt0.o gmon.o
|
||||
${LD} -x -r -o ${.TARGET} moncrt0.o gmon.o
|
||||
|
||||
gmon.o: gmon.c gmon.h
|
||||
${CC} ${CFLAGS} -c ${.IMPSRC}
|
||||
${LD} -x -r ${.TARGET}
|
||||
mv a.out ${.TARGET}
|
||||
|
||||
install:
|
||||
install -d -o ${BINOWN} -g ${BINGRP} -m 0755 ${DESTDIR}/usr/lib
|
||||
install ${COPY} -o ${BINOWN} -g ${BINGRP} -m 444 ${OBJS} \
|
||||
${DESTDIR}/usr/lib
|
||||
|
||||
depend lint tags:
|
||||
|
||||
.include <bsd.prog.mk>
|
||||
|
|
@ -0,0 +1,345 @@
|
|||
/*
|
||||
* Copyright (c) 1993 Paul Kranenburg
|
||||
* 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. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by Paul Kranenburg.
|
||||
* 4. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software withough specific prior written permission
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
||||
*
|
||||
* $Id: crt0.c,v 1.1 1993/11/25 23:22:43 paulus Exp $
|
||||
*/
|
||||
|
||||
|
||||
#if defined(LIBC_SCCS) && !defined(lint)
|
||||
static char sccsid[] = "%W% (Erasmus) %G%";
|
||||
#endif /* LIBC_SCCS and not lint */
|
||||
|
||||
extern void exit();
|
||||
int _callmain();
|
||||
|
||||
#include <sys/param.h>
|
||||
|
||||
#ifdef DYNAMIC
|
||||
#include <sys/types.h>
|
||||
#include <sys/syscall.h>
|
||||
#include <a.out.h>
|
||||
#ifndef N_GETMAGIC
|
||||
#define N_GETMAGIC(x) ((x).a_magic)
|
||||
#endif
|
||||
#ifndef N_BSSADDR
|
||||
#define N_BSSADDR(x) (N_DATADDR(x)+(x).a_data)
|
||||
#endif
|
||||
#include <sys/mman.h>
|
||||
#ifdef sun
|
||||
#define MAP_COPY MAP_PRIVATE
|
||||
#define MAP_FILE 0
|
||||
#define MAP_ANON 0
|
||||
#endif
|
||||
#include <link.h>
|
||||
|
||||
extern struct link_dynamic _DYNAMIC;
|
||||
static void __do_dynamic_link ();
|
||||
static char *_getenv();
|
||||
static int _strncmp();
|
||||
|
||||
#ifdef sun
|
||||
#define LDSO "/usr/lib/ld.so"
|
||||
#endif
|
||||
#ifdef BSD
|
||||
#define LDSO "/usr/libexec/ld.so"
|
||||
#endif
|
||||
|
||||
#endif /* DYNAMIC */
|
||||
|
||||
static char *_strrchr();
|
||||
|
||||
char **environ;
|
||||
|
||||
#ifdef BSD
|
||||
extern unsigned char etext;
|
||||
extern unsigned char eprol asm ("eprol");
|
||||
extern start() asm("start");
|
||||
extern mcount() asm ("mcount");
|
||||
|
||||
int errno;
|
||||
static char empty[1];
|
||||
char *__progname = empty;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* We need these system calls, but can't use library stubs
|
||||
*/
|
||||
#define _exit(v) __syscall(SYS_exit, (v))
|
||||
#define open(name, f, m) __syscall(SYS_open, (name), (f), (m))
|
||||
#define close(fd) __syscall(SYS_close, (fd))
|
||||
#define read(fd, s, n) __syscall(SYS_read, (fd), (s), (n))
|
||||
#define write(fd, s, n) __syscall(SYS_write, (fd), (s), (n))
|
||||
#define dup(fd) __syscall(SYS_dup, (fd))
|
||||
#define dup2(fd, fdnew) __syscall(SYS_dup2, (fd), (fdnew))
|
||||
#ifdef sun
|
||||
#define mmap(addr, len, prot, flags, fd, off) \
|
||||
__syscall(SYS_mmap, (addr), (len), (prot), _MAP_NEW|(flags), (fd), (off))
|
||||
#else
|
||||
#define mmap(addr, len, prot, flags, fd, off) \
|
||||
__syscall(SYS_mmap, (addr), (len), (prot), (flags), (fd), (off))
|
||||
#endif
|
||||
|
||||
#define _FATAL(str) \
|
||||
write(2, str, sizeof(str)), \
|
||||
_exit(1);
|
||||
|
||||
|
||||
/* do we really need this? */
|
||||
asm(".text; orb #0,d0"); /* 32 bits of zero at location 0 */
|
||||
|
||||
start()
|
||||
{
|
||||
struct kframe {
|
||||
int kargc;
|
||||
char *kargv[1]; /* size depends on kargc */
|
||||
char kargstr[1]; /* size varies */
|
||||
char kenvstr[1]; /* size varies */
|
||||
};
|
||||
/*
|
||||
* ALL REGISTER VARIABLES!!!
|
||||
*/
|
||||
register struct kframe *kfp;
|
||||
register char **targv;
|
||||
register char **argv;
|
||||
extern void _mcleanup();
|
||||
#ifdef DYNAMIC
|
||||
volatile caddr_t x;
|
||||
#endif
|
||||
|
||||
#ifdef lint
|
||||
kfp = 0;
|
||||
initcode = initcode = 0;
|
||||
#else /* not lint */
|
||||
asm("lea a6@(4),%0" : "=r" (kfp)); /* catch it quick */
|
||||
#endif /* not lint */
|
||||
for (argv = targv = &kfp->kargv[0]; *targv++; /* void */)
|
||||
/* void */ ;
|
||||
if (targv >= (char **)(*argv))
|
||||
--targv;
|
||||
environ = targv;
|
||||
|
||||
#ifdef DYNAMIC
|
||||
/* ld(1) convention: if DYNAMIC = 0 then statically linked */
|
||||
#ifdef stupid_gcc
|
||||
if (&_DYNAMIC)
|
||||
__do_dynamic_link();
|
||||
#else
|
||||
x = (caddr_t)&_DYNAMIC;
|
||||
if (x)
|
||||
__do_dynamic_link();
|
||||
#endif
|
||||
#endif /* DYNAMIC */
|
||||
|
||||
asm("eprol:");
|
||||
|
||||
#ifdef MCRT0
|
||||
atexit(_mcleanup);
|
||||
monstartup(&eprol, &etext);
|
||||
#endif MCRT0
|
||||
if (argv[0])
|
||||
if ((__progname = _strrchr(argv[0], '/')) == NULL)
|
||||
__progname = argv[0];
|
||||
else
|
||||
++__progname;
|
||||
asm ("__callmain:"); /* Defined for the benefit of debuggers */
|
||||
exit(main(kfp->kargc, argv, environ));
|
||||
}
|
||||
|
||||
#ifdef DYNAMIC
|
||||
static void
|
||||
__do_dynamic_link ()
|
||||
{
|
||||
struct crt_ldso crt;
|
||||
struct exec hdr;
|
||||
char *ldso;
|
||||
int dupzfd;
|
||||
void (*entry)();
|
||||
|
||||
#ifdef DEBUG
|
||||
/* Provision for alternate ld.so - security risk! */
|
||||
if (!(ldso = _getenv("LDSO")))
|
||||
#endif
|
||||
ldso = LDSO;
|
||||
|
||||
crt.crt_ldfd = open(ldso, 0, 0);
|
||||
if (crt.crt_ldfd == -1) {
|
||||
_FATAL("No ld.so\n");
|
||||
}
|
||||
|
||||
/* Read LDSO exec header */
|
||||
if (read(crt.crt_ldfd, &hdr, sizeof hdr) < sizeof hdr) {
|
||||
_FATAL("Failure reading ld.so\n");
|
||||
}
|
||||
if (N_GETMAGIC(hdr) != ZMAGIC) {
|
||||
_FATAL("Bad magic: ld.so\n");
|
||||
}
|
||||
|
||||
#ifdef sun
|
||||
/* Get bucket of zeroes */
|
||||
crt.crt_dzfd = open("/dev/zero", 0, 0);
|
||||
if (crt.crt_dzfd == -1) {
|
||||
_FATAL("No /dev/zero\n");
|
||||
}
|
||||
#endif
|
||||
#ifdef BSD
|
||||
/* We use MAP_ANON */
|
||||
crt.crt_dzfd = -1;
|
||||
#endif
|
||||
|
||||
#if defined(sun) && defined(DUPZFD)
|
||||
if ((dupzfd = dup(crt.crt_dzfd)) < 0) {
|
||||
_FATAL("Cannot dup /dev/zero\n");
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Map in ld.so */
|
||||
crt.crt_ba = mmap(0, hdr.a_text+hdr.a_data+hdr.a_bss,
|
||||
PROT_READ|PROT_EXEC,
|
||||
MAP_FILE|MAP_COPY,
|
||||
crt.crt_ldfd, N_TXTOFF(hdr));
|
||||
if (crt.crt_ba == -1) {
|
||||
_FATAL("Cannot map ld.so\n");
|
||||
}
|
||||
|
||||
#ifdef BSD
|
||||
/* !!!
|
||||
* This is gross, ld.so is a ZMAGIC a.out, but has `sizeof(hdr)' for
|
||||
* an entry point and not at PAGSIZ as the N_*ADDR macros assume.
|
||||
*/
|
||||
#undef N_DATADDR
|
||||
#undef N_BSSADDR
|
||||
#define N_DATADDR(x) ((x).a_text)
|
||||
#define N_BSSADDR(x) ((x).a_text + (x).a_data)
|
||||
#endif
|
||||
|
||||
/* Map in data segment of ld.so writable */
|
||||
if (mmap(crt.crt_ba+N_DATADDR(hdr), hdr.a_data,
|
||||
PROT_READ|PROT_EXEC|PROT_WRITE,
|
||||
MAP_FIXED|MAP_FILE|MAP_COPY,
|
||||
crt.crt_ldfd, N_DATOFF(hdr)) == -1) {
|
||||
_FATAL("Cannot map ld.so\n");
|
||||
}
|
||||
|
||||
/* Map bss segment of ld.so zero */
|
||||
if (hdr.a_bss && mmap(crt.crt_ba+N_BSSADDR(hdr), hdr.a_bss,
|
||||
PROT_READ|PROT_EXEC|PROT_WRITE,
|
||||
MAP_FIXED|MAP_ANON|MAP_COPY,
|
||||
crt.crt_dzfd, 0) == -1) {
|
||||
_FATAL("Cannot map ld.so\n");
|
||||
}
|
||||
|
||||
crt.crt_dp = &_DYNAMIC;
|
||||
crt.crt_ep = environ;
|
||||
crt.crt_bp = (caddr_t)_callmain;
|
||||
|
||||
entry = (void (*)())(crt.crt_ba + sizeof hdr);
|
||||
#ifdef SUN_COMPAT
|
||||
(*entry)(CRT_VERSION_SUN, &crt);
|
||||
#else
|
||||
(*entry)(CRT_VERSION_BSD, &crt);
|
||||
#endif
|
||||
|
||||
#if defined(sun) && defined(DUPZFD)
|
||||
if (dup2(dupzfd, crt.crt_dzfd) < 0) {
|
||||
_FATAL("Cannot dup2 /dev/zero\n");
|
||||
}
|
||||
(void)close(dupzfd);
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Support routines
|
||||
*/
|
||||
|
||||
static int
|
||||
_strncmp(s1, s2, n)
|
||||
register char *s1, *s2;
|
||||
register n;
|
||||
{
|
||||
|
||||
if (n == 0)
|
||||
return (0);
|
||||
do {
|
||||
if (*s1 != *s2++)
|
||||
return (*(unsigned char *)s1 - *(unsigned char *)--s2);
|
||||
if (*s1++ == 0)
|
||||
break;
|
||||
} while (--n != 0);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static char *
|
||||
_getenv(name)
|
||||
register char *name;
|
||||
{
|
||||
extern char **environ;
|
||||
register int len;
|
||||
register char **P, *C;
|
||||
|
||||
for (C = name, len = 0; *C && *C != '='; ++C, ++len);
|
||||
for (P = environ; *P; ++P)
|
||||
if (!_strncmp(*P, name, len))
|
||||
if (*(C = *P + len) == '=') {
|
||||
return(++C);
|
||||
}
|
||||
return (char *)0;
|
||||
}
|
||||
|
||||
asm(" ___syscall:");
|
||||
asm(" movel a7@+,a0"); /* return address */
|
||||
asm(" movel a7@,d0"); /* syscall number */
|
||||
asm(" movel a0,a7@");
|
||||
asm(" trap #0"); /* do system call */
|
||||
asm(" bcc 1f"); /* check error */
|
||||
asm(" moveq #-1,d0");
|
||||
asm(" 1: movel a7@,a0"); /* get return address, leave */
|
||||
asm(" jmp a0@"); /* correct amount on stack */
|
||||
|
||||
#endif /* DYNAMIC */
|
||||
|
||||
static char *
|
||||
_strrchr(p, ch)
|
||||
register char *p, ch;
|
||||
{
|
||||
register char *save;
|
||||
|
||||
for (save = NULL;; ++p) {
|
||||
if (*p == ch)
|
||||
save = (char *)p;
|
||||
if (!*p)
|
||||
return(save);
|
||||
}
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
#ifdef MCRT0
|
||||
asm (" .text");
|
||||
asm ("_eprol:");
|
||||
#endif
|
||||
|
|
@ -0,0 +1,329 @@
|
|||
/*-
|
||||
* Copyright (c) 1990 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. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the University of
|
||||
* California, Berkeley and its contributors.
|
||||
* 4. 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.
|
||||
*/
|
||||
|
||||
#ifndef lint
|
||||
/*static char sccsid[] = "from: @(#)gmon.c 5.5 (Berkeley) 5/21/91";*/
|
||||
static char rcsid[] = "$Id: gmon.c,v 1.1 1993/11/25 23:22:44 paulus Exp $";
|
||||
#endif /* not lint */
|
||||
|
||||
#include <unistd.h>
|
||||
|
||||
#ifdef DEBUG
|
||||
#include <stdio.h>
|
||||
#endif
|
||||
|
||||
#include "gmon.h"
|
||||
|
||||
extern mcount() asm ("mcount");
|
||||
extern char *minbrk asm ("minbrk");
|
||||
|
||||
/*
|
||||
* froms is actually a bunch of unsigned shorts indexing tos
|
||||
*/
|
||||
static int profiling = 3;
|
||||
static unsigned short *froms;
|
||||
static struct tostruct *tos = 0;
|
||||
static long tolimit = 0;
|
||||
static char *s_lowpc = 0;
|
||||
static char *s_highpc = 0;
|
||||
static unsigned long s_textsize = 0;
|
||||
|
||||
static int ssiz;
|
||||
static char *sbuf;
|
||||
static int s_scale;
|
||||
/* see profil(2) where this is describe (incorrectly) */
|
||||
#define SCALE_1_TO_1 0x10000L
|
||||
|
||||
#define MSG "No space for profiling buffer(s)\n"
|
||||
|
||||
monstartup(lowpc, highpc)
|
||||
char *lowpc;
|
||||
char *highpc;
|
||||
{
|
||||
int monsize;
|
||||
char *buffer;
|
||||
register int o;
|
||||
|
||||
/*
|
||||
* round lowpc and highpc to multiples of the density we're using
|
||||
* so the rest of the scaling (here and in gprof) stays in ints.
|
||||
*/
|
||||
lowpc = (char *)
|
||||
ROUNDDOWN((unsigned)lowpc, HISTFRACTION*sizeof(HISTCOUNTER));
|
||||
s_lowpc = lowpc;
|
||||
highpc = (char *)
|
||||
ROUNDUP((unsigned)highpc, HISTFRACTION*sizeof(HISTCOUNTER));
|
||||
s_highpc = highpc;
|
||||
s_textsize = highpc - lowpc;
|
||||
monsize = (s_textsize / HISTFRACTION) + sizeof(struct phdr);
|
||||
buffer = sbrk( monsize );
|
||||
if ( buffer == (char *) -1 ) {
|
||||
write( 2 , MSG , sizeof(MSG) );
|
||||
return;
|
||||
}
|
||||
froms = (unsigned short *) sbrk( s_textsize / HASHFRACTION );
|
||||
if ( froms == (unsigned short *) -1 ) {
|
||||
write( 2 , MSG , sizeof(MSG) );
|
||||
froms = 0;
|
||||
return;
|
||||
}
|
||||
tolimit = s_textsize * ARCDENSITY / 100;
|
||||
if ( tolimit < MINARCS ) {
|
||||
tolimit = MINARCS;
|
||||
} else if ( tolimit > 65534 ) {
|
||||
tolimit = 65534;
|
||||
}
|
||||
tos = (struct tostruct *) sbrk( tolimit * sizeof( struct tostruct ) );
|
||||
if ( tos == (struct tostruct *) -1 ) {
|
||||
write( 2 , MSG , sizeof(MSG) );
|
||||
froms = 0;
|
||||
tos = 0;
|
||||
return;
|
||||
}
|
||||
minbrk = sbrk(0);
|
||||
tos[0].link = 0;
|
||||
sbuf = buffer;
|
||||
ssiz = monsize;
|
||||
( (struct phdr *) buffer ) -> lpc = lowpc;
|
||||
( (struct phdr *) buffer ) -> hpc = highpc;
|
||||
( (struct phdr *) buffer ) -> ncnt = ssiz;
|
||||
monsize -= sizeof(struct phdr);
|
||||
if ( monsize <= 0 )
|
||||
return;
|
||||
o = highpc - lowpc;
|
||||
if( monsize < o )
|
||||
#ifndef hp300
|
||||
s_scale = ( (float) monsize / o ) * SCALE_1_TO_1;
|
||||
#else /* avoid floating point */
|
||||
{
|
||||
int quot = o / monsize;
|
||||
|
||||
if (quot >= 0x10000)
|
||||
s_scale = 1;
|
||||
else if (quot >= 0x100)
|
||||
s_scale = 0x10000 / quot;
|
||||
else if (o >= 0x800000)
|
||||
s_scale = 0x1000000 / (o / (monsize >> 8));
|
||||
else
|
||||
s_scale = 0x1000000 / ((o << 8) / monsize);
|
||||
}
|
||||
#endif
|
||||
else
|
||||
s_scale = SCALE_1_TO_1;
|
||||
moncontrol(1);
|
||||
}
|
||||
|
||||
_mcleanup()
|
||||
{
|
||||
int fd;
|
||||
int fromindex;
|
||||
int endfrom;
|
||||
char *frompc;
|
||||
int toindex;
|
||||
struct rawarc rawarc;
|
||||
|
||||
moncontrol(0);
|
||||
fd = creat( "gmon.out" , 0666 );
|
||||
if ( fd < 0 ) {
|
||||
perror( "mcount: gmon.out" );
|
||||
return;
|
||||
}
|
||||
# ifdef DEBUG
|
||||
fprintf( stderr , "[mcleanup] sbuf 0x%x ssiz %d\n" , sbuf , ssiz );
|
||||
# endif DEBUG
|
||||
write( fd , sbuf , ssiz );
|
||||
endfrom = s_textsize / (HASHFRACTION * sizeof(*froms));
|
||||
for ( fromindex = 0 ; fromindex < endfrom ; fromindex++ ) {
|
||||
if ( froms[fromindex] == 0 ) {
|
||||
continue;
|
||||
}
|
||||
frompc = s_lowpc + (fromindex * HASHFRACTION * sizeof(*froms));
|
||||
for (toindex=froms[fromindex]; toindex!=0; toindex=tos[toindex].link) {
|
||||
# ifdef DEBUG
|
||||
fprintf( stderr ,
|
||||
"[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" ,
|
||||
frompc , tos[toindex].selfpc , tos[toindex].count );
|
||||
# endif DEBUG
|
||||
rawarc.raw_frompc = (unsigned long) frompc;
|
||||
rawarc.raw_selfpc = (unsigned long) tos[toindex].selfpc;
|
||||
rawarc.raw_count = tos[toindex].count;
|
||||
write( fd , &rawarc , sizeof rawarc );
|
||||
}
|
||||
}
|
||||
close( fd );
|
||||
}
|
||||
|
||||
mcount()
|
||||
{
|
||||
register char *selfpc;
|
||||
register unsigned short *frompcindex;
|
||||
register struct tostruct *top;
|
||||
register struct tostruct *prevtop;
|
||||
register long toindex;
|
||||
|
||||
/*
|
||||
* find the return address for mcount,
|
||||
* and the return address for mcount's caller.
|
||||
*/
|
||||
asm(".text"); /* make sure we're in text space */
|
||||
/*
|
||||
* selfpc = pc pushed by mcount jsr
|
||||
*/
|
||||
asm("movl a6@(4),%0" : "=r" (selfpc));
|
||||
/*
|
||||
* frompcindex = pc pushed by jsr into self.
|
||||
* In GCC the caller's stack frame has already been built so we
|
||||
* have to chase a6 to find caller's raddr.
|
||||
* NOTE: this assumes that all profiled routines use link/unlk.
|
||||
*/
|
||||
asm("movl a6@(0)@(4),%0" : "=r" (frompcindex));
|
||||
/*
|
||||
* check that we are profiling
|
||||
* and that we aren't recursively invoked.
|
||||
*/
|
||||
if (profiling) {
|
||||
goto out;
|
||||
}
|
||||
profiling++;
|
||||
/*
|
||||
* check that frompcindex is a reasonable pc value.
|
||||
* for example: signal catchers get called from the stack,
|
||||
* not from text space. too bad.
|
||||
*/
|
||||
frompcindex = (unsigned short *)((long)frompcindex - (long)s_lowpc);
|
||||
if ((unsigned long)frompcindex > s_textsize) {
|
||||
goto done;
|
||||
}
|
||||
frompcindex =
|
||||
&froms[((long)frompcindex) / (HASHFRACTION * sizeof(*froms))];
|
||||
toindex = *frompcindex;
|
||||
if (toindex == 0) {
|
||||
/*
|
||||
* first time traversing this arc
|
||||
*/
|
||||
toindex = ++tos[0].link;
|
||||
if (toindex >= tolimit) {
|
||||
goto overflow;
|
||||
}
|
||||
*frompcindex = toindex;
|
||||
top = &tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = 0;
|
||||
goto done;
|
||||
}
|
||||
top = &tos[toindex];
|
||||
if (top->selfpc == selfpc) {
|
||||
/*
|
||||
* arc at front of chain; usual case.
|
||||
*/
|
||||
top->count++;
|
||||
goto done;
|
||||
}
|
||||
/*
|
||||
* have to go looking down chain for it.
|
||||
* top points to what we are looking at,
|
||||
* prevtop points to previous top.
|
||||
* we know it is not at the head of the chain.
|
||||
*/
|
||||
for (; /* goto done */; ) {
|
||||
if (top->link == 0) {
|
||||
/*
|
||||
* top is end of the chain and none of the chain
|
||||
* had top->selfpc == selfpc.
|
||||
* so we allocate a new tostruct
|
||||
* and link it to the head of the chain.
|
||||
*/
|
||||
toindex = ++tos[0].link;
|
||||
if (toindex >= tolimit) {
|
||||
goto overflow;
|
||||
}
|
||||
top = &tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
/*
|
||||
* otherwise, check the next arc on the chain.
|
||||
*/
|
||||
prevtop = top;
|
||||
top = &tos[top->link];
|
||||
if (top->selfpc == selfpc) {
|
||||
/*
|
||||
* there it is.
|
||||
* increment its count
|
||||
* move it to the head of the chain.
|
||||
*/
|
||||
top->count++;
|
||||
toindex = prevtop->link;
|
||||
prevtop->link = top->link;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
|
||||
}
|
||||
done:
|
||||
profiling--;
|
||||
/* and fall through */
|
||||
out:
|
||||
return; /* normal return restores saved registers */
|
||||
|
||||
overflow:
|
||||
profiling++; /* halt further profiling */
|
||||
# define TOLIMIT "mcount: tos overflow\n"
|
||||
write(2, TOLIMIT, sizeof(TOLIMIT));
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Control profiling
|
||||
* profiling is what mcount checks to see if
|
||||
* all the data structures are ready.
|
||||
*/
|
||||
moncontrol(mode)
|
||||
int mode;
|
||||
{
|
||||
if (mode) {
|
||||
/* start */
|
||||
profil(sbuf + sizeof(struct phdr), ssiz - sizeof(struct phdr),
|
||||
(int)s_lowpc, s_scale);
|
||||
profiling = 0;
|
||||
} else {
|
||||
/* stop */
|
||||
profil((char *)0, 0, 0, 0);
|
||||
profiling = 3;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,106 @@
|
|||
/*-
|
||||
* Copyright (c) 1990 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. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the University of
|
||||
* California, Berkeley and its contributors.
|
||||
* 4. 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.
|
||||
*
|
||||
* from: @(#)gmon.h 5.3 (Berkeley) 5/6/91
|
||||
* $Id: gmon.h,v 1.1 1993/11/25 23:22:45 paulus Exp $
|
||||
*/
|
||||
|
||||
struct phdr {
|
||||
char *lpc;
|
||||
char *hpc;
|
||||
int ncnt;
|
||||
};
|
||||
|
||||
/*
|
||||
* histogram counters are unsigned shorts (according to the kernel).
|
||||
*/
|
||||
#define HISTCOUNTER unsigned short
|
||||
|
||||
/*
|
||||
* fraction of text space to allocate for histogram counters
|
||||
* here, 1/2
|
||||
*/
|
||||
#define HISTFRACTION 2
|
||||
|
||||
/*
|
||||
* Fraction of text space to allocate for from hash buckets.
|
||||
* The value of HASHFRACTION is based on the minimum number of bytes
|
||||
* of separation between two subroutine call points in the object code.
|
||||
* Given MIN_SUBR_SEPARATION bytes of separation the value of
|
||||
* HASHFRACTION is calculated as:
|
||||
*
|
||||
* HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
|
||||
*
|
||||
* For the VAX, the shortest two call sequence is:
|
||||
*
|
||||
* calls $0,(r0)
|
||||
* calls $0,(r0)
|
||||
*
|
||||
* which is separated by only three bytes, thus HASHFRACTION is
|
||||
* calculated as:
|
||||
*
|
||||
* HASHFRACTION = 3 / (2 * 2 - 1) = 1
|
||||
*
|
||||
* Note that the division above rounds down, thus if MIN_SUBR_FRACTION
|
||||
* is less than three, this algorithm will not work!
|
||||
*/
|
||||
#define HASHFRACTION 1
|
||||
|
||||
/*
|
||||
* percent of text space to allocate for tostructs
|
||||
* with a minimum.
|
||||
*/
|
||||
#define ARCDENSITY 2
|
||||
#define MINARCS 50
|
||||
|
||||
struct tostruct {
|
||||
char *selfpc;
|
||||
long count;
|
||||
unsigned short link;
|
||||
};
|
||||
|
||||
/*
|
||||
* a raw arc,
|
||||
* with pointers to the calling site and the called site
|
||||
* and a count.
|
||||
*/
|
||||
struct rawarc {
|
||||
unsigned long raw_frompc;
|
||||
unsigned long raw_selfpc;
|
||||
long raw_count;
|
||||
};
|
||||
|
||||
/*
|
||||
* general rounding functions.
|
||||
*/
|
||||
#define ROUNDDOWN(x,y) (((x)/(y))*(y))
|
||||
#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
|
||||
Loading…
Reference in New Issue