Commit graph

9 commits

Author SHA1 Message Date
Graeme Russ
fea2572001 x86: Rename i386 to x86
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-04-13 19:43:28 +10:00
Wolfgang Denk
7ec830d580 Fix build problems caused by "_end" -> "__bss_end__" rename
Commit 44c6e65 "rename _end to __bss_end__ broke building of a large
number of systems (at least all PowerPC?):

libstubs.o: In function `app_startup':
examples/standalone/stubs.c:197: undefined reference to `__bss_end__'

The rename should not be done for the files in the
examples/standalone/ directory, as these are not using the code from
start.S, but do their own BSS clearing, and either use their own
linker scripts or the ones provided by the compilers.

Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
2011-03-31 08:54:35 +02:00
Po-Yu Chuang
44c6e6591c rename _end to __bss_end__
Currently, _end is used for end of BSS section.  We want _end to mean
end of u-boot image, so we rename _end to __bss_end__ first.

Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>
2011-03-27 19:18:37 +02:00
Wolfgang Denk
54841ab50c Make sure that argv[] argument pointers are not modified.
The hush shell dynamically allocates (and re-allocates) memory for the
argument strings in the "char *argv[]" argument vector passed to
commands.  Any code that modifies these pointers will cause serious
corruption of the malloc data structures and crash U-Boot, so make
sure the compiler can check that no such modifications are being done
by changing the code into "char * const argv[]".

This modification is the result of debugging a strange crash caused
after adding a new command, which used the following argument
processing code which has been working perfectly fine in all Unix
systems since version 6 - but not so in U-Boot:

int main (int argc, char **argv)
{
	while (--argc > 0 && **++argv == '-') {
/* ====> */	while (*++*argv) {
			switch (**argv) {
			case 'd':
				debug++;
				break;
			...
			default:
				usage ();
			}
		}
	}
	...
}

The line marked "====>" will corrupt the malloc data structures and
usually cause U-Boot to crash when the next command gets executed by
the shell.  With the modification, the compiler will prevent this with
an
	error: increment of read-only location '*argv'

N.B.: The code above can be trivially rewritten like this:

	while (--argc > 0 && **++argv == '-') {
		char *arg = *argv;
		while (*++arg) {
			switch (*arg) {
			...

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2010-07-04 23:55:42 +02:00
Thomas Chou
1117cbf2ad nios: remove nios-32 arch
The nios-32 arch is obsolete and broken. So it is removed.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
2010-05-28 10:56:04 -04:00
Thomas Chou
0df01fd3d7 nios2: fix r15 issue for gcc4
The "-ffixed-r15" option doesn't work well for gcc4. Since we
don't use gp for small data with option "-G0", we can use gp
as global data pointer. This allows compiler to use r15. It
is necessary for gcc4 to work properly.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
2010-05-28 10:56:03 -04:00
Sergey Mironov
2c0c58b92d Fix bug in jumptable call stubs for SPARC.
Signed-off-by: Sergey Mironov <ierton@gmail.com>
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
2009-10-27 14:09:40 +01:00
Robin Getz
c4db335c2e Blackfin: change global data register from P5 to P3
Since the Blackfin ABI favors higher scratch registers by default, use the
last scratch register (P3) for global data rather than the first (P5).
This allows the compiler's register allocator to use higher number scratch
P registers, which in turn better matches the Blackfin instruction set,
which reduces the size of U-Boot by more than 1024 bytes...

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-02 05:14:02 -04:00
Peter Tyser
1bc1538613 Move examples/ to examples/standalone
The current files in examples are all standalone application examples,
so put them in their own subdirectory for organizational purposes

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2009-07-21 00:13:21 +02:00
Renamed from examples/stubs.c (Browse further)