patch na gcc

[Artur Frysiak]

On Sat, Nov 25, 2000 at 12:50:44AM +0100, Arkadiusz Miskiewicz wrote:
> Jak ktoś ma ochotę to niech sprawdzi czy ów patch naprawia
> mu błąd z lkml (Artur, rzuć tu źródełkiem testującym) w gcc
> na i386, i486, i586 (i686 jest ok).

Idzie w attachu
-- 
Artur Frysiak
http://www.pld.org.pl/
-------------- następna część ---------
/*
 * bug.c - aeb, 001124
 *
 * This program shows a bug in gcc 2.95.2.
 * It should print 0x0 and exit.
 * For me it prints 0x84800000.
 *
 * Compile with:
 *    gcc -Wall -O2 -o bug bug.c
 */
#include <stdio.h>

struct inode {
	long long		i_size;
	struct super_block	*i_sb;
};

struct file {
	long long		f_pos;
};

struct super_block {
	int			s_blocksize;
	unsigned char		s_blocksize_bits;
	int			s_hs;
};

static char *
isofs_bread(unsigned int block)
{
	printf("0x%x\n", block);
	exit(0);
}

static int
do_isofs_readdir(struct inode *inode, struct file *filp)
{
	int bufsize = inode->i_sb->s_blocksize;
	unsigned char bufbits = inode->i_sb->s_blocksize_bits;
	unsigned int block, offset;
	char *bh = NULL;
	int hs;

 	if (filp->f_pos >= inode->i_size)
		return 0;
 
	offset = filp->f_pos & (bufsize - 1);
	block = filp->f_pos >> bufbits;
	hs = inode->i_sb->s_hs;

	while (filp->f_pos < inode->i_size) {
		if (!bh)
			bh = isofs_bread(block);

		hs += block << bufbits;

		if (hs == 0)
			filp->f_pos++;

		if (offset >= bufsize)
			offset &= bufsize - 1;

		if (*bh)
			filp->f_pos++;

		filp->f_pos++;
	}
	return 0;
}

struct super_block s;
struct inode i;
struct file f;

int
main(int argc, char **argv){
	s.s_blocksize = 512;
	s.s_blocksize_bits = 9;
	i.i_size = 2048;
	i.i_sb = &s;
	f.f_pos = 0;

	do_isofs_readdir(&i,&f);
	return 0;
}