similar to: debugging pxelinux

On Tue, Apr 14, 2015 at 03:20:08PM -0400, Gene Cumm wrote: > > I thought I would try to find out how pxelinux copes with this, by trying > > to insert printfs in pxe_init, but nothing gets printed. > > This is normal. Can you give me hint as to why setting > > DEBUGOPT = -DDEBUG=1 -DDEBUG_STDIO -DCORE_DEBUG=1 changes that state of normality? (AFAICT dprintf.h

On Tue, Apr 14, 2015 at 11:25 AM, Patrick Welche via Syslinux <syslinux at zytor.com> wrote: 0) What version(s)? Have you tried the precompiled ones at kernel.org? > I have reason to believe that an odd box that is having boot trouble has > three instances of "!PXE" in the chunk of memory that "Method D" should > look at. 1) You can't have 3 instances in

On 05-08-15 15:28, Gene Cumm wrote: >>> 0x2f8 is a BIOSism. > >> Is this a problem? The example in the comments said 0x3f8 which is COM1. > > It means that a BIOS IO port for a UART won't work for EFI. No value > for DEBUG_PORT will do anything unless someone's got some translation > "glue" to take the attempts to open the UART and use an EFI handle

This patch adds support for printing messages through a debug console. QEMU, for example, supports this through the debugcon facility. The benefit is that it's *much* faster than printing over a serial port. To print to I/O port 0x402 (the default used by SeaBIOS and OVMF), add "-DDEBUG_IO_PORT=0x402 -DCORE_DEBUG=1" to the build CFLAGS. To enable a debug console in QEMU that

On Tue, Oct 27, 2015 at 10:15 PM, Bruno Cornec via Syslinux <syslinux at zytor.com> wrote: > Bruno Cornec via Syslinux said on Wed, Oct 28, 2015 at 01:45:22AM +0100: >> >> Is there a way to increase the debug level of syslinux.efi in order to >> check what it tries to do and diagnose more precisely what happens ? > > > Ok, I tried to modify mk/devel.mk to put:

Hello Geert Thanks for replying.. But i think i can?t use it, as i don?t reach the point where the debug module will be available.. it just pulls the lpxelinux.0 and tries to get the next download-- the ldlinux.c32 and it fails...and freezes. And the next step would be other modules i think.. if i?m wrong.. excuse me 8-).. yesterday i managed to get ipxelinux working from ipxe.org.. so the nic

On Tue, Apr 14, 2015 at 7:13 PM, Patrick Welche <prlw1 at cam.ac.uk> wrote: > On Tue, Apr 14, 2015 at 03:20:08PM -0400, Gene Cumm wrote: >> > I thought I would try to find out how pxelinux copes with this, by trying >> > to insert printfs in pxe_init, but nothing gets printed. >> >> This is normal. > > Can you give me hint as to why setting >

I noticed several issues when diagnosing why pxechn.c32 didn't work in 5.01-pre3. 1) pxechn.c32, prdhcp.c32 and other modules crash Syslinux and force a reboot by executing an unresolved symbols. unload_pxe(), dns_resolv() and pxe_call() are the three. "Error: An undefined symbol was referenced" 2) In past versions, I built a debug build by having "CFLAGS += -DDEBUG=1"

On 05-08-15 12:05, Gene Cumm wrote: > > I recompiled with this in mk/devel.mk <http://devel.mk>: > > GCCWARN += -DDEBUG_PORT=0x2f8 -DCORE_DEBUG=1 > > 0x2f8 is a BIOSism. Is this a problem? The example in the comments said 0x3f8 which is COM1.

On 04-08-15 17:38, Oscar Roozen wrote: > Okay, the code in efi/ uses Print() from gnu_efi, but generic code from > core/ like core/elflink/load_env32.c prints their messages and debugging > stuff using printf(). These messages end up nowhere. This may explain > why I never saw anything beyond a certain point, even with debugging > turned on. I was busy adding some code to dprintf.h

Gene Cumm said on Wed, Oct 28, 2015 at 05:58:59AM -0400: >> Ok, I tried to modify mk/devel.mk to put: >> GCCWARN += -Wno-clobbered -DCORE_DEBUG=1 -DDEBUG_MALLOC -DDEBUG_THREAD >> And removing the -DDYNAMIC_DEBUG but now syslinux doesn't want to build: > >MALLOC and THREAD are two debugs you probably don't want. Ok I can drop them, but that doesn't change the

Hello Thomas, Thomas Schmitt via Syslinux said on Sun, Oct 25, 2015 at 04:35:57PM +0100: >I assume you can boot Fedora Live CD on the same (virtual) hardware. Not sure for Fedora, but the system is installed with either RHEL6, RHEL7 or Ubuntu 14.04 depending on the Lab I'm making on it without issue. >Just to make sure that the firmware works so far. Globally they do ;-) >

On 04-08-15 14:42, Patrick Masotta wrote: > I think we solved a bug but we found a new one. > AFAIK you were not able to retrieve anything after loading syslinux.efi > Now you retrieve ldlinux.e32, libcom32.c32, etc but it crashes when loading a png. > If this is the case then the multi-nic issue is solved; the new code is able to > find the NIC that booted syslinux.efi and then

> On Sep 13, 2015, at 11:04 AM, Gene Cumm <gene.cumm at gmail.com> wrote: > > On Thu, Sep 10, 2015 at 1:55 AM, Khem Raj via Syslinux > <syslinux at zytor.com> wrote: >> We can let compiler driver pass the right options to preprocessor after >> processing -Mxy options, right now its bypassing the gcc driver and >> handing them straight to cpp >>

Hi, I'm following http://llvm.org/docs/SourceLevelDebugging.html#debugopt to do the dbgopt testing. But seems, there is something wrong with the Makefile, it told me : llvm-gcc sse.expandfft.c -g --emit-llvm -c -o Output/sse.expandfft.bc llvm-gcc: sse.expandfft.c: No such file or directory llvm-gcc: no input files Am I missing something, like the configure option? -------------- next part

We can let compiler driver pass the right options to preprocessor after processing -Mxy options, right now its bypassing the gcc driver and handing them straight to cpp This also helps in other compilers processing these options correctly for their preprocessors consumption Signed-off-by: Khem Raj <raj.khem at gmail.com> --- mk/syslinux.mk | 4 ++-- 1 file changed, 2 insertions(+), 2

On 6/6/19 8:16 AM, Ady Ady via Syslinux wrote: > >> the PXELINUX log line is >> printed (PXELINUX 6.04 lwIP 6.04-pre3 Copyright (C) 1994-2015 H. Peter >> Anvin et al), > > (snip) > > FWIW, the official binaries from 6.04-pre2 and 6.04-pre3 are not good > for troubleshooting. > > Is the same behavior present when testing with other versions? I would

From: Sylvain Gault <sylvain.gault at gmail.com> Despite having native network capabilities, UEFI 2.4 (the most widely deployed at the moment) has no native DNS resolver. I propose here an implementation more or less inspired by the one found in core/legacynet/dnsresolv.c. Since it's non-trivial, I'd like to ask for a deep review of this code. I tried to make it as strong as

On Sun, Feb 08, 2015 at 09:13:02AM -0700, Jonathan Boeing via Syslinux wrote: > This patch adds support for printing messages through a debug console. QEMU, > for example, supports this through the debugcon facility. The benefit is that > it's *much* faster than printing over a serial port. > > To print to I/O port 0x402 (the default used by SeaBIOS and OVMF), > add

I am sending a patch that makes the debugging output of PXELINUX slightly more concise, without (intentionally) affecting its completeness at all. Additionally, I am proposing that the debugging output of PXELINUX -- specifically the messages that appear after the copyright statement, but before the menu is loaded -- only be shown in response to keyboard input (such as holding Shift or Alt, or