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/* $OpenBSD: crt0.c,v 1.4 2005/08/04 16:33:05 espie Exp $ */
/* $NetBSD: crt0.c,v 1.7 1995/06/03 13:16:15 pk Exp $ */
/*
* 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 without 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.
*
*/
#include <sys/param.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
extern void __init __P((void));
extern void _mcleanup __P((void));
extern unsigned char eprol asm ("eprol");
extern unsigned char etext;
char **environ;
static char empty[1];
char *__progname = empty;
void __perf_init __P((void));
static inline int
_perfcall(int func, void *arg)
{
int status = 0;
#if 0
__asm__ volatile ( "move $4, %1\n\t"
"move $5, %2\n\t"
"teqi $0, 0\n\t"
"move %0, $2"
: "=r" (status)
: "r" (func), "r" (arg)
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10",
"$11", "$12","$13","$14","$15","$24","$25", "memory");
#endif
return(status);
}
void
__start()
{
struct kframe {
long kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
register struct kframe *kfp;
register char **argv, *ap;
/*
* Do GP register setup. Differs depending on shared lib stuff or not.
*/
#if defined(_NO_ABICALLS)
asm(" la $28,_gp");
asm(" addiu %0,$29,32" : "=r" (kfp));
#else
#ifdef __LP64__
asm(" addiu %0,$29,80" : "=r" (kfp));
#else
asm(" addiu %0,$29,56" : "=r" (kfp));
#endif
#endif
/* just above the saved frame pointer
kfp = (struct kframe *) (¶m-1);*/
argv = &kfp->kargv[0];
environ = argv + kfp->kargc + 1;
if (ap = argv[0])
if ((__progname = strrchr(ap, '/')) == NULL)
__progname = ap;
else
++__progname;
asm("eprol:");
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
#endif /*MCRT0*/
__init();
__perf_init();
asm ("_callmain:"); /* Defined for the benefit of debuggers */
exit(main(kfp->kargc, argv, environ));
}
#ifdef MCRT0
asm (" .text");
asm ("_eprol:");
#endif
/************/
#include <stdio.h>
void _perf_cleanup __P((void));
#define PCNT_CE 0x0400 /* Count enable */
#define PCNT_UM 0x0200 /* Count in User mode */
#define PCNT_KM 0x0100 /* Count in kernel mode */
#define PCNT_FNC_SELECT 0x0001 /* Select counter source */
#define PCNT_FNC_READ 0x0002 /* Read current value of counter */
struct cname {
char *name;
int cval;
} cn_tab[] = {
{ "CLOCKS", 0x00 },
{ "INSTR", 0x01 },
{ "FPINSTR", 0x02 },
{ "IINSTR", 0x03 },
{ "LOAD", 0x04 },
{ "STORE", 0x05 },
{ "DUAL", 0x06 },
{ "BRPREF", 0x07 },
{ "EXTMISS", 0x08 },
{ "STALL", 0x09 },
{ "SECMISS", 0x0a },
{ "INSMISS", 0x0b },
{ "DTAMISS", 0x0c },
{ "DTLBMISS", 0x0d },
{ "ITLBMISS", 0x0e },
{ "JTLBIMISS", 0x0f },
{ "JTLBDMISS", 0x10 },
{ "BRTAKEN", 0x11 },
{ "BRISSUED", 0x12 },
{ "SECWBACK", 0x13 },
{ "PRIWBACK", 0x14 },
{ "DCSTALL", 0x15 },
{ "MISS", 0x16 },
{ "FPEXC", 0x17 },
{ "MULSLIP", 0x18 },
{ "CP0SLIP", 0x19 },
{ "LDSLIP", 0x1a },
{ "WBFULL", 0x1b },
{ "CISTALL", 0x1c },
{ "MULSTALL", 0x1d },
{ "ELDSTALL", 0x1e },
};
#define NCNTAB (sizeof(cn_tab) / sizeof(struct cname))
void
__perf_init()
{
long pselect;
char *cn;
if((cn = getenv("__PERF_SELECT")) == NULL) {
return;
}
for(pselect = 0; pselect < NCNTAB; pselect++) {
if(strcmp(cn, cn_tab[pselect].name) == 0) {
pselect = cn_tab[pselect].cval;
break;
}
}
if(pselect >= NCNTAB) {
fprintf(stderr, "!! Invalid __PERF_SELECT !!\n");
exit(255);
}
_perfcall(PCNT_FNC_SELECT, (void *)(PCNT_CE|PCNT_UM|pselect)); /*XXX*/
atexit(_perf_cleanup);
if((cn = getenv("__PERF_START")) == NULL) {
return;
}
}
void
_perf_cleanup()
{
quad_t countvalue;
_perfcall(PCNT_FNC_READ, &countvalue);
printf("\ncount = %qd.\n", countvalue);
}
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