platform/upstream/syslinux.git
12 years agocore: remove unused variable in scan_highmem_area()
H. Peter Anvin [Tue, 29 May 2012 21:53:52 +0000 (14:53 -0700)]
core: remove unused variable in scan_highmem_area()

Remove a completely unused variable giving a "set but not used"
warning.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agoMerge commit 'd76af0754db7ddd4c06215d922d213c93178c0af' into elflink
H. Peter Anvin [Tue, 29 May 2012 21:53:07 +0000 (14:53 -0700)]
Merge commit 'd76af0754db7ddd4c06215d922d213c93178c0af' into elflink

12 years agopxe: move hardwired DHCP options into high memory
H. Peter Anvin [Tue, 29 May 2012 19:22:32 +0000 (12:22 -0700)]
pxe: move hardwired DHCP options into high memory

If we have hardwired DHCP options, move them into high memory instead
of into the trackbuf.  This eliminates yet another trackbuf user.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agopxe: remove remaining stray trackbuf reference
H. Peter Anvin [Tue, 29 May 2012 19:01:25 +0000 (12:01 -0700)]
pxe: remove remaining stray trackbuf reference

We aren't using trackbuf, stop referring to it...

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agopxe: stop using trackbuf for DHCP packets
H. Peter Anvin [Tue, 29 May 2012 18:56:05 +0000 (11:56 -0700)]
pxe: stop using trackbuf for DHCP packets

Get rid of yet another trackbuf usage.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agocore/font.c: remove another reference to trackbuf
H. Peter Anvin [Tue, 29 May 2012 18:46:41 +0000 (11:46 -0700)]
core/font.c: remove another reference to trackbuf

Remove a dead reference to trackbuf.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agocore/font: clean up and remove trackbuf usage
H. Peter Anvin [Tue, 29 May 2012 18:41:51 +0000 (11:41 -0700)]
core/font: clean up and remove trackbuf usage

This code was pretty messed up; it used the trackbuf for simple file
I/O, but didn't use lowmem for the actual font buffer, which is
touched by BIOS.

This also removes yet another user of trackbuf.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agocom32: fix warning in host module
Paulo Alcantara [Mon, 28 May 2012 04:04:00 +0000 (01:04 -0300)]
com32: fix warning in host module

host.c: In function ‘main’:
host.c:56:9: warning: implicit declaration of function ‘exit’
                            [-Wimplicit-function-declaration]
host.c:56:9: warning: incompatible implicit declaration of built-in
                                function ‘exit’ [enabled by default]

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agocom32: fix warning in elf_module
Paulo Alcantara [Mon, 28 May 2012 03:52:03 +0000 (00:52 -0300)]
com32: fix warning in elf_module

sys/module/elf_module.c: In function ‘module_load’:
sys/module/elf_module.c:454:8: warning: ‘ctors’ may be used
                    uninitialized in this function [-Wuninitialized]
sys/module/elf_module.c:404:17: note: ‘ctors’ was declared here

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agolocalboot: remove unnecessary real-mode call
Paulo Alcantara [Mon, 28 May 2012 03:31:59 +0000 (00:31 -0300)]
localboot: remove unnecessary real-mode call

syslinux_local_boot() used to call local_boot() from INT 0x22
(AX=0x0014) as it should just call local_boot() function.

The local_boot() function is now exported by core/include/localboot.h to
be used in COM32 library space so that syslinux_local_boot() can use it.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agographics: make use of syslinux_force_text_mode()
Paulo Alcantara [Sat, 19 May 2012 04:58:03 +0000 (01:58 -0300)]
graphics: make use of syslinux_force_text_mode()

The syslinux_force_text_mode() function used in library
space made unnecessary INT 0x22 call that could be simply
used with vgaclearmode() function.

This patche renames vgaclearmode() to
syslinux_force_text_mode() as this naming is generally more
carefully considered and gets rid of "forcetext.c" source
file.

Also all the VGA-related functions and variables that were
exported in core/include/bios.h have been moved out to
core/include/graphics.h which makes more sense actually.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoCLI: don't highlight the prompt syslinux-5.00-pre2
H. Peter Anvin [Fri, 18 May 2012 23:29:42 +0000 (16:29 -0700)]
CLI: don't highlight the prompt

Don't gratuitously highlight the prompt; it is just annoying.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agosyslinux_boot_linux(): revert to text mode unless vga=current
H. Peter Anvin [Fri, 18 May 2012 23:26:53 +0000 (16:26 -0700)]
syslinux_boot_linux(): revert to text mode unless vga=current

When loading a Linux kernel, revert to text mode before invoking
unless vga=current.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agocom32: make syslinux_dump_*() pure debugging functions
H. Peter Anvin [Tue, 28 Jun 2011 02:06:43 +0000 (19:06 -0700)]
com32: make syslinux_dump_*() pure debugging functions

Make the syslinux_dump_*() functions pure debugging functions; that is
the way that they are used anyway, and this way they log to the same
place as dprintf.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoUse <dprintf.h> instead of an ad hoc definition
H. Peter Anvin [Tue, 28 Jun 2011 01:51:11 +0000 (18:51 -0700)]
Use <dprintf.h> instead of an ad hoc definition

Instead of using ad hoc definitions of dprintf, dprintf2, vdprintf and
vdprintf2, use <dprintf.h> everywhere possible.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agodprintf: always define dprintf2/vdprintf2
H. Peter Anvin [Tue, 21 Jun 2011 04:33:38 +0000 (21:33 -0700)]
dprintf: always define dprintf2/vdprintf2

Always define dprintf2/vdprintf2 even with no debugging at all
enabled.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agolib/shuffle: use <dprintf.h>
H. Peter Anvin [Tue, 21 Jun 2011 04:19:46 +0000 (21:19 -0700)]
lib/shuffle: use <dprintf.h>

Another straggler not yet using <dprintf.h> for debugging.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agodprintf: add the ability to log to stdio
H. Peter Anvin [Tue, 21 Jun 2011 04:19:17 +0000 (21:19 -0700)]
dprintf: add the ability to log to stdio

Add the ability to redirect dprintf to stdio when there is no other
choice.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Resolved Conflicts:

com32/lib/dprintf.c
com32/lib/vdprintf.c

12 years agovdprintf.c: undo double-printing
H. Peter Anvin [Fri, 18 May 2012 23:01:25 +0000 (16:01 -0700)]
vdprintf.c: undo double-printing

Undo double-printing change so we can sync with master.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoCLI: Stick to the classic "boot: " prompt rather than "syslinux$"
H. Peter Anvin [Fri, 18 May 2012 22:42:38 +0000 (15:42 -0700)]
CLI: Stick to the classic "boot: " prompt rather than "syslinux$"

Just for familiarity...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agofs.h: A slighly more useful default PATH
H. Peter Anvin [Fri, 18 May 2012 22:38:08 +0000 (15:38 -0700)]
fs.h: A slighly more useful default PATH

/bin is clearly insane...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoMakefile: install library modules, too
H. Peter Anvin [Fri, 18 May 2012 22:37:32 +0000 (15:37 -0700)]
Makefile: install library modules, too

We need the library modules to be added to MODULES.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoelflink: Make sure to install ldlinux.c32 at install time
H. Peter Anvin [Fri, 18 May 2012 22:00:04 +0000 (15:00 -0700)]
elflink: Make sure to install ldlinux.c32 at install time

We need to reach ldlinux.c32 during early boot...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoelflink: make dprintf() usable in the core
H. Peter Anvin [Fri, 18 May 2012 21:59:15 +0000 (14:59 -0700)]
elflink: make dprintf() usable in the core

Make dprintf() usable in the core, as it it on the mainline branch.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agosyslinux.mk: use $(MAKEDIR) not $(makefiledir)
H. Peter Anvin [Fri, 18 May 2012 21:47:40 +0000 (14:47 -0700)]
syslinux.mk: use $(MAKEDIR) not $(makefiledir)

Everything else in the system seems to use $(MAKEDIR), not
$(makefiledir)...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agographics: report video mode change from protected-mode code
Paulo Alcantara [Fri, 4 May 2012 07:43:34 +0000 (04:43 -0300)]
graphics: report video mode change from protected-mode code

Syslinux used to call __intcall() for calling routines of the old
COMBOOT API to report video mode change (INT 22h, AX=0x0017) that seemed
pointless, since INT 22h, AX=0x0017 does call the protected-mode
function pm_using_vga() already when calling INT 22h, AX=0x0017. So for
reporting video mode changes (VGA in this case) we must call
graphics_using_vga() instead for now.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agocom32: Do not use hard-coded values for PXE flags
Paulo Alcantara [Fri, 4 May 2012 06:58:52 +0000 (03:58 -0300)]
com32: Do not use hard-coded values for PXE flags

There is already a syslinux/pxe_api.h header file which contains PXE
flags, so these hard-coded values are unnecessaries.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agopxe: resolve names via DNS from protected-mode code
Paulo Alcantara [Fri, 4 May 2012 05:17:46 +0000 (02:17 -0300)]
pxe: resolve names via DNS from protected-mode code

Syslinux used to call __intcall() for calling routines of the old
COMBOOT API to resolve names via DNS (INT 22h, AX=0x0010) that seemed
pointless, since INT 22h, AX=0x0010 does call the protected-mode
function pm_pxe_resolv_dns() when calling INT 22h, AX=0x0010. So, for
resolving names via DNS we must call pxe_dns_resolv() (a protected-mode
function) instead for now.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agopxe: rename pxe_dns_resolv() function to pm_pxe_dns_resolv()
Paulo Alcantara [Mon, 30 Apr 2012 05:59:30 +0000 (02:59 -0300)]
pxe: rename pxe_dns_resolv() function to pm_pxe_dns_resolv()

As pxe_dns_resolv() (a protected-mode function) is just a wrapper for
real mode (used in the old COMBOOT API), so it makes more sense to
have it named as pm_pxe_dns_resolv().

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agohost.c32: do not use INT 22h, AX=0x0010 to resolve DNS
Paulo Alcantara [Mon, 30 Apr 2012 04:49:16 +0000 (01:49 -0300)]
host.c32: do not use INT 22h, AX=0x0010 to resolve DNS

Use pxe_dns() function (assigned in syslinux/pxe.h) instead for
resolving DNS.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoPXELINUX: do not use hard-coded values
Paulo Alcantara [Sat, 28 Apr 2012 18:40:31 +0000 (15:40 -0300)]
PXELINUX: do not use hard-coded values

PXENV_RESTART_TFTP and PXENV_FILE_EXEC flags are already declared in
core/pxe.inc, so we don't need to use hard-coded values there.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoISOLINUX: use bailmsg string in kaboom()
Paulo Alcantara [Thu, 19 Apr 2012 03:28:40 +0000 (00:28 -0300)]
ISOLINUX: use bailmsg string in kaboom()

Every code which implements kaboom(), uses bailmsg string. So we must
use it in core/isolinux.asm as well.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoISOLINUX: trivial fix
Paulo Alcantara [Thu, 19 Apr 2012 03:25:57 +0000 (00:25 -0300)]
ISOLINUX: trivial fix

Fix minor typo.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoMerge remote-tracking branch 'mfleming/elflink' into elflink
H. Peter Anvin [Fri, 4 May 2012 19:12:47 +0000 (12:12 -0700)]
Merge remote-tracking branch 'mfleming/elflink' into elflink

12 years agoldlinux: Parse ALLOWOPTIONS directive
Matt Fleming [Thu, 3 May 2012 12:54:14 +0000 (13:54 +0100)]
ldlinux: Parse ALLOWOPTIONS directive

Specifying the ALLOWOPTIONS directive doesn't have any effect at the
moment. Fix this so that if ALLOWOPTIONS 0 is used then command line
arguments are ignored.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Fix TIMEOUT and TOTALTIMEOUT handling
Matt Fleming [Thu, 3 May 2012 12:19:52 +0000 (13:19 +0100)]
elflink: Fix TIMEOUT and TOTALTIMEOUT handling

Paulo reported that his default command line wasn't being executed
when the timeout specified in his config file elapsed. This is because
mygetkey() wasn't correctly applying the timeout when waiting for
input.

Furthermore, it seems the ONTIMEOUT parsing was also broken.

Reported-by: Paulo Alcantara <pcacjr@zytor.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Don't drop args if we auto-lookup cmd extension
Matt Fleming [Tue, 1 May 2012 15:00:12 +0000 (16:00 +0100)]
ldlinux: Don't drop args if we auto-lookup cmd extension

If we automatically lookup the extension for a command and the user
has supplied an argument to that command we incorrectly stamp the NUL
byte after the extension, and not after the argument, thereby
effectively erasing the argument.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoget_key: Valid key values are positive
H. Peter Anvin [Tue, 17 Apr 2012 18:25:53 +0000 (11:25 -0700)]
get_key: Valid key values are positive

Make sure we return positive values for valid keystrokes.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agocore/graphics.c: Fixes and cleanups
H. Peter Anvin [Tue, 17 Apr 2012 18:22:36 +0000 (11:22 -0700)]
core/graphics.c: Fixes and cleanups

Fix up various conversion bugs from assembly.  Eventually this whole
file should be removed and the functionality moved to using the VESA
framework.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agohw/vga.h: Header file for VGA hardware registers
H. Peter Anvin [Tue, 17 Apr 2012 17:42:17 +0000 (10:42 -0700)]
hw/vga.h: Header file for VGA hardware registers

Header file for VGA hardware registers; so far only the base registers
and sub-register indicies, but no bit masks or bit positions; those
can be added as needed.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
12 years agoMerge branches 'auto-extension' and 'fix-build-warnings' into elflink
Matt Fleming [Tue, 17 Apr 2012 10:24:56 +0000 (11:24 +0100)]
Merge branches 'auto-extension' and 'fix-build-warnings' into elflink

Conflicts:
com32/elflink/ldlinux/ldlinux.c

12 years agoMark unused function parameters as __unused
Matt Fleming [Wed, 4 Apr 2012 11:18:47 +0000 (12:18 +0100)]
Mark unused function parameters as __unused

Move the __unused tag from com32/hdt/ to com32/include/klibc/ so that
it can be used by the entire code base, and mark unused function
parameters as __unused to stop the following kind of build warning,

elflink/load_env32.c: In function ‘load_env32’:
elflink/load_env32.c:107:30: warning: unused parameter ‘regs’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Remove unused variables
Matt Fleming [Wed, 4 Apr 2012 09:27:42 +0000 (10:27 +0100)]
elflink: Remove unused variables

Reduce the number of build warnings by deleting unused variables.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agofs: Include unistd.h for chdir() prototype
Matt Fleming [Tue, 3 Apr 2012 15:34:25 +0000 (16:34 +0100)]
fs: Include unistd.h for chdir() prototype

fs/lib/chdir.c: In function ‘generic_chdir_start’:
fs/lib/chdir.c:5:2: warning: implicit declaration of function ‘chdir’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agofs: Include header for close() prototype
Matt Fleming [Tue, 3 Apr 2012 15:28:52 +0000 (16:28 +0100)]
fs: Include header for close() prototype

... which avoids the following build warning,

fs/fs.c: In function ‘open_config’:
fs/fs.c:97:2: warning: implicit declaration of function ‘close’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Allocate space for 'realname'
Matt Fleming [Tue, 3 Apr 2012 15:17:17 +0000 (16:17 +0100)]
elflink: Allocate space for 'realname'

search_dirs() expects the 'realname' argument to point to space
allocated for storing the real path name. Currently we're passing an
uninitialized pointer which was highlighted by the following build
warning,

elflink/load_env32.c:155:18: warning: ‘realname’ may be used uninitialized in this function

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Delete obsolete constructor code
Matt Fleming [Tue, 3 Apr 2012 15:07:09 +0000 (16:07 +0100)]
elflink: Delete obsolete constructor code

Since commit 8e0ed96bff75 ("elf: Support __constructor and
__destructor") the code for looping over ctors in ldlinux has been
unnecessary. Delete since this is all now handled in the core module
loading code.

This also gets rid of the following build warning,

elflink/load_env32.c: At top level:
elflink/load_env32.c:28:15: warning: array ‘__ctors_start’ assumed to have one element
elflink/load_env32.c:28:32: warning: array ‘__ctors_end’ assumed to have one element

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoconio: Fix up compiler warnings
Matt Fleming [Tue, 3 Apr 2012 15:00:53 +0000 (16:00 +0100)]
conio: Fix up compiler warnings

conio.c: In function ‘pm_getchar’:
conio.c:336:2: warning: pointer targets in passing argument 1 of ‘getchar’ differ in signedness
conio.c:268:6: note: expected ‘char *’ but argument is of type ‘uint8_t *’
conio.c: In function ‘pm_pollchar’:
conio.c:261:1: warning: control reaches end of non-void function

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agographics: Fix GXPix* assignment
Matt Fleming [Tue, 3 Apr 2012 14:30:58 +0000 (15:30 +0100)]
graphics: Fix GXPix* assignment

We need assign cols/rows to GXPixCols/GXPixRows separately, we can't
rely on the compiler writing the 32-bit value to two consecutive
16-bit memory locations like the assembly version did. The value we
were storing was actually being truncated by the compiler (see the
warning below),

Also fixup the following warnings,

graphics.c: In function ‘vgasetmode’:
graphics.c:95:18: warning: cast from pointer to integer of different size
graphics.c:102:2: warning: large integer implicitly truncated to unsigned type
graphics.c: In function ‘outputvga’:
graphics.c:222:12: warning: cast from pointer to integer of different size
graphics.c:227:11: warning: cast from pointer to integer of different size
graphics.c: In function ‘vgadisplayfile’:
graphics.c:303:4: warning: passing argument 1 of ‘outputvga’ from incompatible pointer type
graphics.c:213:13: note: expected ‘uint32_t *’ but argument is of type ‘uint8_t *’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agofont: Cast away compiler warning
Matt Fleming [Tue, 3 Apr 2012 14:14:24 +0000 (15:14 +0100)]
font: Cast away compiler warning

font.c: In function ‘adjust_screen’:
font.c:167:30: warning: initialization makes pointer from integer without a cast

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agowritestr: Include core.h for writechr() prototype
Matt Fleming [Tue, 3 Apr 2012 13:57:58 +0000 (14:57 +0100)]
writestr: Include core.h for writechr() prototype

This eliminates the following compiler warning,

writestr.c: In function ‘crlf’:
writestr.c:26:2: warning: implicit declaration of function ‘writechr’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agohello: Delete unused variable 'console_init'
Matt Fleming [Tue, 3 Apr 2012 13:38:08 +0000 (14:38 +0100)]
hello: Delete unused variable 'console_init'

Which also gets rid of the following warning,

hello.c:10:12: warning: ‘console_init’ defined but not used

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoinit: Fix up compiler warnings
Matt Fleming [Tue, 3 Apr 2012 12:55:51 +0000 (13:55 +0100)]
init: Fix up compiler warnings

Fix up the following compiler warnings by including appropriate
headers, applying some casts, and changing some data types,

init.c:7:1: warning: large integer implicitly truncated to unsigned type
init.c: In function ‘check_escapes’:
init.c:32:10: warning: cast from pointer to integer of different size
init.c:46:4: warning: implicit declaration of function ‘writestr’
init.c: In function ‘bios_timer_init’:
init.c:57:19: warning: initialization makes pointer from integer without a cast
init.c:61:8: warning: assignment makes integer from pointer without a cast
init.c: In function ‘init’:
init.c:74:2: warning: implicit declaration of function ‘adjust_screen’
init.c:75:2: warning: implicit declaration of function ‘printf_init’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agolocalboot: Include header files for function prototypes
Matt Fleming [Tue, 3 Apr 2012 11:58:52 +0000 (12:58 +0100)]
localboot: Include header files for function prototypes

... to avoid the following warnings,

localboot.c: In function ‘local_boot’:
localboot.c:38:2: warning: implicit declaration of function ‘vgaclearmode’
localboot.c:40:2: warning: implicit declaration of function ‘writestr’
localboot.c:41:2: warning: implicit declaration of function ‘crlf’
localboot.c:42:2: warning: implicit declaration of function ‘cleanup_hardware’
localboot.c:76:2: warning: implicit declaration of function ‘memcpy’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agomeminfo: If we allocate with lmalloc() we should free with lfree()
Matt Fleming [Tue, 3 Apr 2012 11:12:50 +0000 (12:12 +0100)]
meminfo: If we allocate with lmalloc() we should free with lfree()

Since commit 74518b8b691c ("elflink: Make ELF the default object
format") we've been using lmalloc() with free() instead of lfree().
This bug was pointed out by the following build warnings,

meminfo.c: In function ‘dump_e820’:
meminfo.c:93:5: warning: implicit declaration of function ‘free’
meminfo.c:93:5: warning: incompatible implicit declaration of built-in function ‘free’
vesainfo.c: In function ‘print_modes’:
vesainfo.c:82:2: warning: implicit declaration of function ‘free’
vesainfo.c:82:2: warning: incompatible implicit declaration of built-in function ‘free’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Include write_serial() prototype
Matt Fleming [Tue, 3 Apr 2012 10:49:50 +0000 (11:49 +0100)]
ldlinux: Include write_serial() prototype

Include core.h to avoid the following build warning,

eprintf.c: In function ‘veprintf’:
eprintf.c:23:6: warning: implicit declaration of function ‘write_serial’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agocore: Move write_serial() prototype to core.h
Matt Fleming [Tue, 3 Apr 2012 10:37:36 +0000 (11:37 +0100)]
core: Move write_serial() prototype to core.h

There's nothing inherently BIOS-specific about write_serial(), so it
doesn't make sense to have it in bios.h. Move the prototype to core.h
so that files can access the prototype without pulling in all the BIOS
symbols. Also add some missing function prototypes while we're at it.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Use signed char consistently
Matt Fleming [Tue, 3 Apr 2012 09:48:52 +0000 (10:48 +0100)]
ldlinux: Use signed char consistently

In get_key() we use unsigned chars but seem to use signed chars in
other functions. There's no real reason to use unsigned chars so let's
be consistent. This also eliminates the following warnings,

get_key.c: In function ‘get_key’:
get_key.c:187:2: warning: pointer targets in passing argument 1 of ‘get_key_decode’ differ in signedness
get_key.c:129:5: note: expected ‘char *’ but argument is of type ‘unsigned char *’
serirq.c:29:29: warning: pointer targets in initialization differ in signedness
serirq.c:30:29: warning: pointer targets in initialization differ in signedness

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Fix uninitialized variable warning
Matt Fleming [Mon, 2 Apr 2012 16:11:57 +0000 (17:11 +0100)]
ldlinux: Fix uninitialized variable warning

Fix the following warning by initializing 'kernel_name' to NULL,

kernel.c:18:14: warning: ‘kernel_name’ may be used uninitialized in this function

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Add prototype for new_linux_kernel()
Matt Fleming [Mon, 2 Apr 2012 16:07:59 +0000 (17:07 +0100)]
ldlinux: Add prototype for new_linux_kernel()

Make sure we're passing the correct arguments to new_linux_kernel() by
defining a prototype. This also fixes the following warning,

execute.c:108:3: warning: implicit declaration of function ‘new_linux_kernel’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Fix number of arguments to start_ldlinux()
Matt Fleming [Mon, 2 Apr 2012 14:51:45 +0000 (15:51 +0100)]
ldlinux: Fix number of arguments to start_ldlinux()

Commit 3a316db1 ("ldlinux: Loading a config file should cause
re-initialisation") added a call to start_ldlinux() with an incorrect
number of arguments. Add the prototype to core.h so this error doesn't
go unnoticed again.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Cast some arguments to avoid compiler warnings
Matt Fleming [Mon, 2 Apr 2012 14:14:55 +0000 (15:14 +0100)]
ldlinux: Cast some arguments to avoid compiler warnings

Specifically these warnings,

execute.c: In function ‘execute’:
execute.c:87:3: warning: passing argument 1 of ‘lfree’ discards qualifiers from pointer target type
../../../com32/include/com32.h:125:6: note: expected ‘void *’ but argument is of type ‘const char *’
execute.c:88:3: warning: passing argument 1 of ‘create_args_and_load’ discards qualifiers from pointer target type
execute.c:40:12: note: expected ‘char *’ but argument is of type ‘const char *’
execute.c:111:2: warning: passing argument 1 of ‘lfree’ discards qualifiers from pointer target type
../../../com32/include/com32.h:125:6: note: expected ‘void *’ but argument is of type ‘const char *’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Use '\0' instead of NULL when dealing with characters
Matt Fleming [Mon, 2 Apr 2012 13:44:46 +0000 (14:44 +0100)]
ldlinux: Use '\0' instead of NULL when dealing with characters

We should be using '\0', not NULL when signalling 'end of string'.
Using NULL results in the following warning,

readconfig.c: In function ‘parse_one_config’:
readconfig.c:1355:17: warning: assignment makes integer from pointer without a cast

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agocore: Add open_config() prototype
Matt Fleming [Mon, 2 Apr 2012 13:44:10 +0000 (14:44 +0100)]
core: Add open_config() prototype

... to fix the following warning,

readconfig.c: In function ‘parse_one_config’:
readconfig.c:1339:3: warning: implicit declaration of function ‘open_config’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Fix build warnings caused by refstrdup() usage
Matt Fleming [Mon, 2 Apr 2012 13:26:22 +0000 (14:26 +0100)]
ldlinux: Fix build warnings caused by refstrdup() usage

Sprinkle 'const' qualifiers when dealing with refstrdup() to fix the
following warnings,

readconfig.c: In function ‘parse_config_file’:
readconfig.c:1127:12: warning: assignment discards qualifiers from pointer target type
readconfig.c:1139:12: warning: assignment discards qualifiers from pointer target type
readconfig.c:1152:12: warning: assignment discards qualifiers from pointer target type
readconfig.c:1315:12: warning: assignment discards qualifiers from pointer target type

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Silence gcc warning about uninitialized variable
Matt Fleming [Mon, 2 Apr 2012 13:12:06 +0000 (14:12 +0100)]
ldlinux: Silence gcc warning about uninitialized variable

Initialize 'comm_counter' so that gcc will no longer complain with the
following,

cli.c: In function ‘edit_cmdline’:
cli.c:142:25: warning: ‘comm_counter’ may be used uninitialized in this function

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Add print_labels() prototype to config.h
Matt Fleming [Mon, 2 Apr 2012 13:07:33 +0000 (14:07 +0100)]
ldlinux: Add print_labels() prototype to config.h

... to fix the following build warning,

cli.c: In function ‘edit_cmdline’:
cli.c:411:3: warning: implicit declaration of function ‘print_labels’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Fix check for last command line entry
Matt Fleming [Mon, 2 Apr 2012 12:50:22 +0000 (13:50 +0100)]
ldlinux: Fix check for last command line entry

The expression that checks to see when we've reached the end of the
command line entries is incorrect, probably because the list macros
weren't used. Use list_is_last() to make the expression correct and
self-documenting.

This bug was highlighted by the following compiler warning,

cli.c: In function ‘cmd_reverse_search’:
cli.c:102:20: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Match arg types to function prototypes
Matt Fleming [Mon, 2 Apr 2012 12:36:17 +0000 (13:36 +0100)]
ldlinux: Match arg types to function prototypes

Change the types of some local variables to match the type in the
function prototypes, thereby avoiding the following warnings,

ldlinux.c:132:2: warning: pointer targets in passing argument 2 of ‘syslinux_getadv’ differ in signedness
../../../com32/include/syslinux/adv.h:55:22: note: expected ‘size_t *’ but argument is of type ‘int *’
ldlinux.c:132:6: warning: assignment discards qualifiers from pointer target type
ldlinux.c:156:3: warning: pointer targets in passing argument 1 of ‘load_kernel’ differ in signedness
ldlinux.c:58:13: note: expected ‘const char *’ but argument is of type ‘uint8_t *’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Tag __syslinux_init() as __constructor
Matt Fleming [Mon, 2 Apr 2012 11:53:59 +0000 (12:53 +0100)]
ldlinux: Tag __syslinux_init() as __constructor

We don't need to have control over exactly when __syslinux_init() is
executed, it just needs to be before we call syslinux_get_adv(). Let's
apply the __constructor tag to __syslinux_init() so that it is
executed before we enter ldlinux.c32's main(). This partially reverts
commit 487b67a9ce ("ldlinux: Remove __constructor attribute") because
we can now have __constructor functions in ldlinux.

By not calling __syslinux_init() directly we also avoid the following
build warning,

ldlinux.c: In function ‘main’:
ldlinux.c:131:2: warning: implicit declaration of function ‘__syslinux_init’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: parse_kernel_type() parameter should be const
Matt Fleming [Mon, 2 Apr 2012 11:41:50 +0000 (12:41 +0100)]
ldlinux: parse_kernel_type() parameter should be const

Since we always pass a const char * to parse_kernel_type(), change the
type of the parameter accordingly to get rid of the following
warnings,

ldlinux.c:66:3: warning: passing argument 1 of ‘parse_kernel_type’ discards qual
ifiers from pointer target type
ldlinux.c:14:25: note: expected ‘char *’ but argument is of type ‘const char *’
ldlinux.c:80:2: warning: passing argument 1 of ‘parse_kernel_type’ discards qual
ifiers from pointer target type
ldlinux.c:14:25: note: expected ‘char *’ but argument is of type ‘const char *’
ldlinux.c: In function ‘main’:

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Include headers for function prototypes
Matt Fleming [Mon, 2 Apr 2012 11:35:33 +0000 (12:35 +0100)]
ldlinux: Include headers for function prototypes

Include the appropriate headers to fix up the following build
warnings,

ldlinux.c: In function ‘parse_kernel_type’:
ldlinux.c:27:2: warning: implicit declaration of function ‘strncmp’
ldlinux.c: In function ‘load_kernel’:
ldlinux.c:64:2: warning: implicit declaration of function ‘find_label’
ldlinux.c:64:5: warning: assignment makes pointer from integer without a cast

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Add _module_unload() prototype to module.h
Matt Fleming [Mon, 2 Apr 2012 10:50:03 +0000 (11:50 +0100)]
elflink: Add _module_unload() prototype to module.h

Commit 8e0ed96bff7 ("elf: Support __constructor and __destructor")
failed to add a prototype for the newly introduced _module_unload()
function, which resulted in the following build warning being
introduced,

sys/module/exec.c: In function ‘spawn_load’:
sys/module/exec.c:222:3: warning: implicit declaration of function ‘_module_unload’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Fix module_load() compiler warnings
Matt Fleming [Mon, 2 Apr 2012 10:24:04 +0000 (11:24 +0100)]
elflink: Fix module_load() compiler warnings

Correct the 'argv' argument to spawn_load() in module_load() and
include the header containing the spawn_load() prototype, thereby
fixing the following warning,

sys/module/elf_module.c: In function ‘module_load’:
sys/module/elf_module.c:534:5: warning: initialization makes integer from pointer without a cast
sys/module/elf_module.c:534:5: warning: initialization makes integer from pointer without a cast
sys/module/elf_module.c:535:5: warning: implicit declaration of function ‘spawn_load’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Fix build warnings
Matt Fleming [Mon, 2 Apr 2012 10:07:56 +0000 (11:07 +0100)]
elflink: Fix build warnings

There's a lot of void * arithmetic going on in the ELF code that the
compiler warns about, i.e.

sys/module/common.c: In function ‘check_symbols’:
sys/module/common.c:325:44: warning: pointer of type ‘void *’ used in arithmetic

Cast the void * pointers to char * so that we can do byte arithmetic
on them.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoelflink: Delete dump_elf_module()
Matt Fleming [Fri, 30 Mar 2012 14:19:07 +0000 (15:19 +0100)]
elflink: Delete dump_elf_module()

dump_elf_module() doesn't have any callers (it's call site is
commented out in module_load()) and it's definition currently emits
the following build warning,

In file included from exit.c:34:0:
../include/sys/module.h: In function ‘dump_elf_module’:
../include/sys/module.h:123:55: warning: unused parameter ‘module’

Just delete it. If anyone needs a similar function in future it is
trivial to write.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agosyslinux/idle.c: Fix build warnings from missing prototypes
Matt Fleming [Fri, 30 Mar 2012 13:58:41 +0000 (14:58 +0100)]
syslinux/idle.c: Fix build warnings from missing prototypes

Include core.h to fix the following build warnings,

syslinux/idle.c: In function ‘syslinux_reset_idle’:
syslinux/idle.c:41:5: warning: implicit declaration of function ‘reset_idle’
syslinux/idle.c: In function ‘syslinux_idle’:
syslinux/idle.c:46:5: warning: implicit declaration of function ‘__idle’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agosys/fileclose.c: Fix build warning from missing prototype
Matt Fleming [Fri, 30 Mar 2012 12:22:40 +0000 (13:22 +0100)]
sys/fileclose.c: Fix build warning from missing prototype

Include fs.h to avoid the following warning,

sys/fileclose.c: In function ‘__file_close’:
sys/fileclose.c:42:2: warning: implicit declaration of function ‘close_file’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agosys/fileread.c: Fix build warning from missing prototype
Matt Fleming [Fri, 30 Mar 2012 12:16:00 +0000 (13:16 +0100)]
sys/fileread.c: Fix build warning from missing prototype

Include the appropriate header to fix the following warning,

sys/fileread.c: In function ‘__file_get_block’:
sys/fileread.c:45:5: warning: implicit declaration of function ‘pmapi_read_file’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agosys/open.c: Fix building warnings from missing prototype
Matt Fleming [Fri, 30 Mar 2012 12:09:16 +0000 (13:09 +0100)]
sys/open.c: Fix building warnings from missing prototype

Fix the following warning by including the appropriate header,

sys/open.c: In function ‘open’:
sys/open.c:67:5: warning: implicit declaration of function ‘open_file’

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agogetcwd.c: Include core_getcwd() prototype
Matt Fleming [Fri, 30 Mar 2012 12:07:12 +0000 (13:07 +0100)]
getcwd.c: Include core_getcwd() prototype

Fix the following warning by including the appropriate header,

getcwd.c: In function ‘getcwd’:
getcwd.c:10:5: warning: implicit declaration of function ‘core_getcwd’
getcwd.c:10:5: warning: return makes pointer from integer without a cast

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agocore: Partial revert of commit 9333426b and unify lmalloc()
Matt Fleming [Fri, 30 Mar 2012 11:45:33 +0000 (12:45 +0100)]
core: Partial revert of commit 9333426b and unify lmalloc()

The reason behind commit 9333426b ("elflink: fix the global naming for
lmalloc") seems to be that we need to avoid having two 'lmalloc'
symbols, one in the core and one in the com32 library.

Unfortunately, this commit introduced the following warning in
multiple places,

meminfo.c:47:2: warning: implicit declaration of function ‘lmalloc’
meminfo.c:47:9: warning: assignment makes pointer from integer without a cast
meminfo.c:93:5: warning: implicit declaration of function ‘free’
meminfo.c:93:5: warning: incompatible implicit declaration of built-in function ‘free’

Consolidate the implementations of lmalloc() so that it's suitable for
use both in the com32 library code and the core.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Automatically lookup file extension
Matt Fleming [Fri, 30 Mar 2012 09:57:22 +0000 (10:57 +0100)]
ldlinux: Automatically lookup file extension

The old kernel loader would automatically calculate valid file
extensions if one wasn't supplied by the user. For example, if a user
types 'ls' we want to run the ls.c32 module. Add support for this to
the new code in ldlinux.

Reported-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoRemove core/ui.inc completely from Syslinux
Paulo Alcantara [Wed, 11 Apr 2012 23:39:05 +0000 (20:39 -0300)]
Remove core/ui.inc completely from Syslinux

The old UI used by Syslinux is no longer supported. The 32-bit environment
already provides us an awesome prompt.

All Syslinux variants do not depend on it anymore, thus they were
modified in order to support the new prompt provided by the ELF module
ldlinux.c32.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoPXELINUX: call open_config() function before loading 32-bit environment
Paulo Alcantara [Wed, 11 Apr 2012 22:24:19 +0000 (19:24 -0300)]
PXELINUX: call open_config() function before loading 32-bit environment

ldlinux.c32 needs ConfigName variable to be set before jumping to 32-bit
ELF space. As pxe_open_config() is called from open_config() in
core/pxelinux.asm, it will set ConfigName variable accordingly.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoPXELINUX: get rid of core/ui.inc file
Paulo Alcantara [Wed, 11 Apr 2012 03:52:50 +0000 (00:52 -0300)]
PXELINUX: get rid of core/ui.inc file

core/ui.inc is no longer used. As it used to contain the boot prompt
code, there is replacement of it, the enter_cmdline() function
(com32/elflink/ldlinux/ldlinux.c). There were some variables declared in
core/ui.inc that are used by core/pxelinux.asm, so those were all moved
out to core/pxelinux.asm as well.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agoPXELINUX: do not load 32-bit environment twice
Paulo Alcantara [Sun, 8 Apr 2012 19:33:16 +0000 (16:33 -0300)]
PXELINUX: do not load 32-bit environment twice

Calling load_env32() once, it should never return. If it does, then jump
to kaboom.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
12 years agolibinstaller: Avoid using <linux/ext2_fs.h>
H. Peter Anvin [Tue, 27 Mar 2012 05:51:09 +0000 (22:51 -0700)]
libinstaller: Avoid using <linux/ext2_fs.h>

Don't use <linux/ext2_fs.h> if we can avoid it.

The ioctl constants have been globalized and moved to <linux/fs.h>.
Use a private copy of ext2_fs.h from e2fsprogs with the ioctl
constants removed for the data structures.

Do at least attempt backward compatibility for old kernel headers, but
no real hope of proper operation there...

[ Doing this as a cherry-pick to unblock this branch ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Resolved Conflicts:

libinstaller/linuxioctl.h

12 years agoMakefile.private: remove obsolete preupload rule syslinux-5.00-pre1
H. Peter Anvin [Tue, 27 Mar 2012 21:47:04 +0000 (14:47 -0700)]
Makefile.private: remove obsolete preupload rule

Remove obsolete preupload rule, already deleted on the master branch.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoversion: Bump date to 2012
H. Peter Anvin [Tue, 27 Mar 2012 21:44:23 +0000 (14:44 -0700)]
version: Bump date to 2012

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agokernel: Support multiple initrds
H. Peter Anvin [Tue, 27 Mar 2012 21:42:51 +0000 (14:42 -0700)]
kernel: Support multiple initrds

Support loading multiple initrd images separated by commas.  It still
doesn't correctly handle a secondary initrd= argument overriding the
first; not clear if that really was a good idea or if they would be
considered additive arguments.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoRevert "ldlinux: Disable VGA graphics when loading a kernel"
H. Peter Anvin [Tue, 27 Mar 2012 21:41:55 +0000 (14:41 -0700)]
Revert "ldlinux: Disable VGA graphics when loading a kernel"

This reverts commit 87320b8de8f331b9c1810e98e24426e70b0ae29f.

That commit would change the mode before the kernel was actually
loaded, but would leave the console nonfunctional if it was vesacon.

We may need to do something similar eventually, but that one is not
correct.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agomenu: Make "menu clear" the default
H. Peter Anvin [Tue, 27 Mar 2012 21:39:46 +0000 (14:39 -0700)]
menu: Make "menu clear" the default

Make "menu clear" the default... it was sort of implicitly so at least
for vesamenu when using the old system, since we would end up zapping
the mode when any output happened, but that no longer is the case.

Also move the cursor to the top of the screen.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agocore: Abstract search_config() into search_dirs()
Matt Fleming [Tue, 13 Mar 2012 12:23:56 +0000 (12:23 +0000)]
core: Abstract search_config() into search_dirs()

The core currently abuses search_config() in order to locate
ldlinux.c32. The problem with this is that search_config() updates
ConfigName with the realpath of the file on every invocation. If we've
previously set ConfigName search_config() will overwrite this value.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agomk: Don't link against compiler's version of libgcc
Matt Fleming [Mon, 12 Mar 2012 19:40:33 +0000 (19:40 +0000)]
mk: Don't link against compiler's version of libgcc

Syslinux provides its own copy of libgcc functions in
com32/lib/libgcc, so we don't need to link against the version
provided by the compiler. What's worse, the behaviour is different
between the two versions.

This caused problems, for example, when parsing the TOTALTIMEOUT
config directive in com32/menu because of the following calculation,

totaltimeout = (atoll(skipspace(p + 13)) * CLK_TCK + 9) / 10;

which invokes __divdi3() as provided by libgcc. The results returned
by the Syslinux and compiler's copy of libgcc differ, leading to
differences in behaviour.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Don't alloc initramfs unless initrd= is specified
Matt Fleming [Fri, 9 Mar 2012 12:49:50 +0000 (12:49 +0000)]
ldlinux: Don't alloc initramfs unless initrd= is specified

It only makes sense to allocate memory for 'initramfs' if an initrd=
argument was on the command line, otherwise we're wasting memory.

Furthermore needlessly allocating 'initramfs' actually caused old
kernels, such as memtest86, to fail to run because of the following
check in syslinux_boot_kernel(),

    if (initramfs && hdr.version < 0x0200)
        goto bail;              /* initrd/initramfs not supported */

Move the allocation after we've checked for and found an initrd=
argument.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Disable VGA graphics when loading a kernel
Matt Fleming [Fri, 9 Mar 2012 10:53:52 +0000 (10:53 +0000)]
ldlinux: Disable VGA graphics when loading a kernel

The state of the graphics hardware is unknown when we're about to load
a new kernel. It could be running in VGA mode, so let's disable VGA
graphics before passing control to the kernel.

The old assembly version of this code made extensive used of
writestr(), which always calls vgaclearmode(). In the C version we're
using printf() and so need to call vgaclearmode() directly. Doing it
directly has the added advantage of documenting exactly where we need
to reset the graphics hardware.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Make the default execute type KT_KERNEL
Matt Fleming [Tue, 13 Mar 2012 09:39:14 +0000 (09:39 +0000)]
ldlinux: Make the default execute type KT_KERNEL

Default to trying to boot a linux kernel image, which was the
behaviour of the old asm image file loader.

Note that we don't need to go through __intcall() to load a kernel as
the dynamic linker will fixup any references to the kernel load
functions for us at runtime. Furthermore, modules invoking execute()
could be located anywhere in the 32-bit address space and may not be
able to represent their pointer arguments with SEG() and OFFS(), so
using the comboot API may not even work.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: Avoid initialised data memory corruption
Matt Fleming [Wed, 7 Mar 2012 15:18:51 +0000 (15:18 +0000)]
ldlinux: Avoid initialised data memory corruption

We can't realloc() 'PATH' because realloc() may just extend the
malloc'd region if the adjacent region is free, as opposed to
allocating a new region and then copying the data. This behaviour is
fine in most circumstances but not with initialised string data, such
as 'PATH'. The reason is that other string data pointers may point to
characters in 'PATH' and if we modify it after realloc()'ing, we'll
appear to corrupt unrelated string data.

For example, the string "/" is used in chdir() and the address of that
string is the last "/" in 'PATH'. If we realloc() and then append
"foo" to 'PATH' the string pointer in chdir() will now point to "/foo".

Initialise 'PATH' at runtime using malloc() and free() to avoid
corrupting string data.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
12 years agoldlinux: chdir to the APPEND str when parsing a CONFIG directive
Matt Fleming [Tue, 13 Mar 2012 10:06:59 +0000 (10:06 +0000)]
ldlinux: chdir to the APPEND str when parsing a CONFIG directive

If an APPEND directive was specified for a CONFIG label then we need
to chdir to that directory after parsing the new config file.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>