Hi,
I downloaded the u-boot repository from this website,
http://www.denx.de/wiki/U-Boot. I am using an ARM11 board, which
means that the compiler supports ELDK 4.2 (with EABI supported). So,
the -mabi switch is set to aapcs-linux -mno-thumb-interwork. I am
trying to get EXT2 support in u-boot, when I noticed a variable length
declaration of a character array. In the ext2fs_iterate_dir function
in fs/ext2/ext2fs.c file, I see the following lines of code
char filename[dirent.namelen + 1];
[The code as is gives me problems, sine I notice that the Link
Register in the stack gets overwritten, and so when it comes out of
the ext2fs_read_file function, it does not get to the next line of
code, but gets into some random behaviour and the Program counter
points to a random location in memory. Now, if I replace the above
code with malloc, or create a fixed length array like (char
filename[2048]), then this code works fine. The same code works on an
omap platform, when the -mabi switch is set to apcs-gnu and
-mno-thumb-interwork.]
ext2fs_node_t fdiro;
int type = FILETYPE_UNKNOWN;
status = ext2fs_read_file (diro,
fpos + sizeof (struct ext2_dirent),
dirent.namelen, filename);
Please let me know of any pointers to this issue.
I have also filed an issue with the uboot mailing list, and then I was
directed to get in touch with the gcc mailing list.
[http://lists.denx.de/pipermail/u-boot/2010-March/068339.html]
Thanks,
Praveen
