u-boot

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Commit Graph

Author	SHA1	Message	Date
Wolfgang Denk	1a4596601f	Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>	12 years ago
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>	15 years ago
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>	16 years ago
wdenk	27b207fd0a	* Implement new mechanism to export U-Boot's functions to standalone applications: instead of using (PPC-specific) system calls we now use a jump table; please see doc/README.standalone for details * Patch by Dave Westwood, 24 Jul 2003: added support for Unity OS (a proprietary OS)	22 years ago
wdenk	3b285da69a	Initial revision	23 years ago
wdenk	592ec2c500	Initial revision	25 years ago
wdenk	2d39b71fb2	Initial revision	25 years ago
wdenk	fb48c4afc4	Initial revision	25 years ago

3 Commits (8c1b717218aff5a1eae0f045dcb64088f3728102)