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File linux32.c of Package linux32 (Revision 1f977c8e17b1c207963686feb34b7194)

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/* Written 2002 by Andi Kleen */
#include <sys/personality.h>
#include <unistd.h>
#include <string.h>
#include <libgen.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>

/* Make --3gb the default for buggy Java */
#define STUPID_DEFAULT 1

#ifdef STUPID_DEFAULT 
#define DFL_PER PER_LINUX32_3GB
#else
#define DFL_PER PER_LINUX32
#endif

#define  ADDR_LIMIT_3GB        0x8000000
#define  PER_LINUX32_3GB       (0x0008 | ADDR_LIMIT_3GB)

int main(int ac, char **av) 
{ 
	int pers = DFL_PER; 
	char *progname;
	
	progname = basename(av[0]);

if (!strcmp(progname, "linux64")) {
		pers= PER_LINUX;
		
		/* ignore --3gb or --4gb for linux64 */
		if (av[1] && (!strcmp(av[1], "--3gb") || !strcmp(av[1], "--4gb")))
			av++;
	}
	else if (!strcmp(progname,"linux32")) {
		pers = DFL_PER;

if (av[1] && !strcmp(av[1], "--3gb")) {
			pers = PER_LINUX32_3GB; 
			av++; 
		}	
		if (av[1] && !strcmp(av[1], "--4gb")) {
			pers = PER_LINUX32; 
			av++; 
		}	
	}

if (!av[1]) {
		if (pers == PER_LINUX) {  /* 64 bit, no options */
			fprintf(stderr, "usage: %s program args ...\n", progname);
		} else {
			fprintf(stderr, "usage: %s [--3gb] [--4gb] program args ...\n", progname);
#if DFL_PER == PER_LINUX32_3GB
			fprintf(stderr, "Default is --3gb to limit the address space of the 32bit children to 3GB\n");
#endif
		}
		exit(1);
	}

if (personality(pers) < 0) {
		fprintf(stderr, "Cannot set %x personality: %s\n", pers,
			strerror(errno));
		exit(1);
	} 
	execvp(av[1],av+1);
	fprintf(stderr, "Cannot execute %s: %s\n", av[1], strerror(errno)); 
	exit(1); 
}

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File linux32.c of Package linux32 (Revision 1f977c8e17b1c207963686feb34b7194)

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