On Wed, Apr 01, 2020 at 10:29:14AM -0700, Fangrui Song wrote:
> This improves the portability of the linker script and allows lld to link
> rom.o
>
> Dot assignment inside an output section has an inconsistent behavior
> which makes lld difficult to implement.
> See
On 2020-04-06, Kevin O'Connor wrote:
On Wed, Apr 01, 2020 at 10:29:12AM -0700, Fangrui Song wrote:
(1) In romlayout.S, .fixedaddr.\addr sections do have not the SHF_ALLOC flag.
It does not make sense to reference a SHF_ALLOC section from a non-SHF_ALLOC
section via R_386_PC16.
GNU ld allows it
This improves the portability of the linker script and allows lld to link rom.o
Dot assignment inside an output section has an inconsistent behavior
which makes lld difficult to implement.
See https://bugs.llvm.org/show_bug.cgi?id=43083
Dropping `. =` turns out to be beneficial to older GNU ld
On Fri, Apr 03, 2020 at 10:31:19AM +0200, Gerd Hoffmann wrote:
> Create a list of devices found in the DSDT table. Add helper functions
> to find devices, walk the list and figure device informations like mmio
> ranges and irqs.
>
> Signed-off-by: Gerd Hoffmann
> ---
> src/util.h |
On 2020-04-06, Kevin O'Connor wrote:
On Wed, Apr 01, 2020 at 10:29:15AM -0700, Fangrui Song wrote:
The previous commit changed romlayout32flag.lds to use `. += ` instead
of `. =`.
We no longer need the LD capability test checking
https://sourceware.org/bugzilla/show_bug.cgi?id=12726
Thanks.
On 2020-04-06, Kevin O'Connor wrote:
On Wed, Apr 01, 2020 at 10:29:13AM -0700, Fangrui Song wrote:
Accepting ET_EXEC as an input file is an extremely rare GNU ld feature
that lld does not intend to support, because this is error-prone.
See Linux kernel commit
On Fri, Apr 03, 2020 at 10:31:20AM +0200, Gerd Hoffmann wrote:
> Don't initialize the ps/2 keyboard in case the device is not
> listed in the ACPi DSDT table.
>
> Signed-off-by: Gerd Hoffmann
> ---
> src/hw/ps2port.c | 4
> 1 file changed, 4 insertions(+)
>
> diff --git a/src/hw/ps2port.c
On Wed, Apr 01, 2020 at 10:29:13AM -0700, Fangrui Song wrote:
> Accepting ET_EXEC as an input file is an extremely rare GNU ld feature
> that lld does not intend to support, because this is error-prone.
>
> See Linux kernel commit 90ceddcb495008ac8ba7a3dce297841efcd7d584 for
> another use of the
On Wed, Apr 01, 2020 at 10:29:15AM -0700, Fangrui Song wrote:
> The previous commit changed romlayout32flag.lds to use `. += ` instead
> of `. =`.
> We no longer need the LD capability test checking
> https://sourceware.org/bugzilla/show_bug.cgi?id=12726
Thanks. It would be great to remove this
On Mon, Apr 06, 2020 at 05:26:35PM -0700, Fangrui Song wrote:
> On 2020-04-06, Kevin O'Connor wrote:
> > On Wed, Apr 01, 2020 at 10:29:12AM -0700, Fangrui Song wrote:
> > > (1) In romlayout.S, .fixedaddr.\addr sections do have not the SHF_ALLOC
> > > flag.
> > > It does not make sense to
On 2020-04-06, Kevin O'Connor wrote:
On Wed, Apr 01, 2020 at 10:29:14AM -0700, Fangrui Song wrote:
This improves the portability of the linker script and allows lld to link rom.o
Dot assignment inside an output section has an inconsistent behavior
which makes lld difficult to implement.
See
On Fri, Apr 03, 2020 at 10:31:13AM +0200, Gerd Hoffmann wrote:
> Add a new virtio-mmio.c source file, providing a function
> to register virtio-mmio devices.
>
> Signed-off-by: Gerd Hoffmann
> ---
> Makefile | 2 +-
> src/hw/virtio-mmio.h | 6 ++
> src/hw/virtio-mmio.c | 30
On Wed, Apr 01, 2020 at 06:12:09PM -0700, Fangrui Song wrote:
> objdump -h relies heavily on BFD internals and the BFD flags are difficult to
> emulate in llvm-objdump.
> llvm-objdump -h has a different output (https://reviews.llvm.org/D57146)
>
> Switch to readelf, which is generally better
On Wed, Apr 01, 2020 at 10:29:12AM -0700, Fangrui Song wrote:
> (1) In romlayout.S, .fixedaddr.\addr sections do have not the SHF_ALLOC flag.
> It does not make sense to reference a SHF_ALLOC section from a non-SHF_ALLOC
> section via R_386_PC16.
> GNU ld allows it but lld will warn. Add the
On 2020-04-06, Kevin O'Connor wrote:
On Wed, Apr 01, 2020 at 06:12:09PM -0700, Fangrui Song wrote:
objdump -h relies heavily on BFD internals and the BFD flags are difficult to
emulate in llvm-objdump.
llvm-objdump -h has a different output (https://reviews.llvm.org/D57146)
Switch to readelf,
Accepting ET_EXEC as an input file is an extremely rare GNU ld feature
that lld does not intend to support, because this is error-prone.
See Linux kernel commit 90ceddcb495008ac8ba7a3dce297841efcd7d584 for
another use of the dd trick.
--
Changes v1 -> v2
* Add status=none to the dd command line.
This patch series make seabios linkable with lld.
This is beneficial for FreeBSD ports as well
https://svnweb.freebsd.org/ports/head/misc/seabios/Makefile
as they can drop an LLD_UNSAFE
As a maintainer of lld ELF, I have triaged numerous pieces of software.
seabios is the only one making use of
The previous commit changed romlayout32flag.lds to use `. += ` instead
of `. =`.
We no longer need the LD capability test checking
https://sourceware.org/bugzilla/show_bug.cgi?id=12726
Signed-off-by: Fangrui Song
---
scripts/test-build.sh | 42 +-
1 file
lld requires output section descriptions to be sorted by address.
Just sort the addresses beforehand.
--
Changes v2 -> v3
* Sort sections by finalloc unconditionally
Signed-off-by: Fangrui Song
---
scripts/layoutrom.py | 1 +
1 file changed, 1 insertion(+)
diff --git a/scripts/layoutrom.py
It does not make sense to reference a SHF_ALLOC section from a
non-SHF_ALLOC section via R_386_PC16. Conceptually, even if a
non-SHF_ALLOC is loaded as part of the memory image, the distance
between it and a SHF_ALLOC section may not be a constant, so the linker
cannot reasonably resolve the
Hello, recently I've found the-sea-watcher project and now I'm trying to repeat
it.
https://scumjr.github.io/2016/01/10/from-smm-to-userland-in-a-few-bytes/
But I have a strange problem when I trigger a SMI my VM instantly reboot. I use
that function to send SMI:
#define PORT_SMI_CMD
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