SeaBIOS July 2020

seabios@seabios.org

14 participants
12 discussions

[PATCH v3 0/5] Make seabios linkable with lld
by Fangrui Song 12 Aug '21

12 Aug '21

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 This drops the only instance https://sourceware.org/bugzilla/show_bug.cgi?id=12726 1, 2, 3 and 4 are really independent and can be applied in arbitrary order. 5 depends on 4. I originally combined 4 and 5 and that was why I don't think a patch series made sense. Fangrui Song (5): romlayout.S: Add missing SHF_ALLOC flag to .fixedaddr.\addr Make rom16.o linkable with lld Makefile: Change ET_EXEC to ET_REL so that lld can link bios.bin.elf romlayout32flag.lds: Use `. +=` instead of `. =` test-build.sh: Delete unneeded LD capability test Makefile | 4 ++++ scripts/layoutrom.py | 13 ++++++++++--- scripts/test-build.sh | 42 +----------------------------------------- src/romlayout.S | 2 +- 4 files changed, 16 insertions(+), 45 deletions(-) -- 2.26.0.292.g33ef6b2f38-goog

4 16

release planning
by Gerd Hoffmann 28 Jul '20

28 Jul '20

Hi, qemu 5.1 is coming closer, with freeze in a week and release in August. See https://wiki.qemu.org/Planning/5.1 We'll need a new seabios release for qemu 5.1, and the options we have are: (1) cherry-pick bugfixes (at least the cirrus vga fix, probably more) into 1.13-stable, tag a 1.13.1 stable release. (2) tag a 1.14 release from master branch. Given we have several useful changes in the master branch which I would not consider being bugfixes a 1.14 released would be nice. Freeze in a week and release in three weeks should work fine with the qemu release schedule. What do you think? take care, Gerd

3 7

[PATCH v2] virtio-scsi: fix boot prio detection by using correct lun
by Stefan Reiter 28 Jul '20

28 Jul '20

Commits d6bdb85eb0 virtio-scsi: skip initializing non-bootable devices f82e82a5ab2 virtio-mmio: add support for scsi devices. both use the lun value from tmpl_drv, which is always 0, instead of the correct one passed as a separate parameter. This causes systems where LUNs other than 0 are set as bootable, but 0 is not, to not boot. Reviewed-by: Paul Menzel <pmenzel(a)molgen.mpg.de> Signed-off-by: Stefan Reiter <s.reiter(a)proxmox.com> --- v2: * sep*a*rate :) * collect Paul's R-b src/hw/virtio-scsi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/src/hw/virtio-scsi.c b/src/hw/virtio-scsi.c index 59f1c65..369c981 100644 --- a/src/hw/virtio-scsi.c +++ b/src/hw/virtio-scsi.c @@ -126,14 +126,14 @@ virtio_scsi_add_lun(u32 lun, struct drive_s *tmpl_drv) int prio = -1; if (tmpl_vlun->pci) - prio = bootprio_find_scsi_device(tmpl_vlun->pci, tmpl_vlun->target, tmpl_vlun->lun); + prio = bootprio_find_scsi_device(tmpl_vlun->pci, tmpl_vlun->target, lun); if (tmpl_vlun->mmio) - prio = bootprio_find_scsi_mmio_device(tmpl_vlun->mmio, tmpl_vlun->target, tmpl_vlun->lun); + prio = bootprio_find_scsi_mmio_device(tmpl_vlun->mmio, tmpl_vlun->target, lun); if (skip_nonbootable && prio < 0) { dprintf(1, "skipping init of a non-bootable virtio-scsi dev at %s," " target %d, lun %d\n", - tmpl_vlun->name, tmpl_vlun->target, tmpl_vlun->lun); + tmpl_vlun->name, tmpl_vlun->target, lun); return -1; } -- 2.20.1

2 1

[PATCH] hw/nvme: Increase `nvme_cmd_readwrite()` message log level from 3 to 5
by Paul Menzel 28 Jul '20

28 Jul '20

Currently, setting SeaBIOS debug level to 3, the log is filled with messages like below. ns 1 read lba 11346288+8: 0 ns 1 read lba 11346296+4: 0 ns 1 read lba 11346300+4: 0 ns 1 read lba 11346304+8: 0 ns 1 read lba 11346312+8: 0 ns 1 read lba 11346320+8: 0 ns 1 read lba 11346328+8: 0 ns 1 read lba 11346336+8: 0 With SeaBIOS as coreboot payload, this fills up the CBMEM console buffer. So, increase the debug level to 5, so possible console buffer do not overflow. Signed-off-by: Paul Menzel <pmenzel(a)molgen.mpg.de> --- src/hw/nvme.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/hw/nvme.c b/src/hw/nvme.c index 41f3b76..6a01204 100644 --- a/src/hw/nvme.c +++ b/src/hw/nvme.c @@ -669,7 +669,7 @@ nvme_cmd_readwrite(struct nvme_namespace *ns, struct disk_op_s *op, int write) } res = nvme_io_readwrite(ns, op->lba + i, ns->dma_buffer, blocks, write); - dprintf(3, "ns %u %s lba %llu+%u: %d\n", ns->ns_id, write ? "write" + dprintf(5, "ns %u %s lba %llu+%u: %d\n", ns->ns_id, write ? "write" : "read", op->lba + i, blocks, res); -- 2.26.2

3 2

[PATCHv2] ldnoexec: Add script to remove ET_EXEC flag from intermediate build objects
by Kevin O'Connor 28 Jul '20

28 Jul '20

Add a script to remove the ET_EXEC flag from the 16bit and "32bit segmented" intermediate objects. This avoids build failures with some linkers that will not allow linking these objects again. Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> -- v2: Use python instead of python2 in the script header --- Makefile | 9 +++++---- scripts/ldnoexec.py | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+), 4 deletions(-) create mode 100755 scripts/ldnoexec.py diff --git a/Makefile b/Makefile index c20be15..3d8943e 100644 --- a/Makefile +++ b/Makefile @@ -127,9 +127,10 @@ $(Q)printf '$(foreach i,$2,#include "$i"\n)' > $3.tmp.c $(Q)$(CC) -I. $1 $(CFLAGSWHOLE) -c $3.tmp.c -o $3 endef -%.strip.o: %.o +%.noexec.o: %.o @echo " Stripping $@" - $(Q)$(STRIP) $< -o $@ + $(Q)$(STRIP) $< -o $<.strip.o + $(Q)$(PYTHON) ./scripts/ldnoexec.py $<.strip.o $@ $(OUT)%.s: %.c @echo " Compiling to assembler $@" @@ -185,9 +186,9 @@ $(OUT)rom32seg.o: $(OUT)code32seg.o $(OUT)romlayout32seg.lds @echo " Linking $@" $(Q)$(LD) -T $(OUT)romlayout32seg.lds $< -o $@ -$(OUT)rom.o: $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds +$(OUT)rom.o: $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds @echo " Linking $@" - $(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o -o $@ + $(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o -o $@ $(OUT)bios.bin.prep: $(OUT)rom.o scripts/checkrom.py @echo " Prepping $@" diff --git a/scripts/ldnoexec.py b/scripts/ldnoexec.py new file mode 100755 index 0000000..6d4e14b --- /dev/null +++ b/scripts/ldnoexec.py @@ -0,0 +1,32 @@ +#!/usr/bin/env python +# Script to remove EXEC flag from an ELF file +# +# Copyright (C) 2020 Kevin O'Connor <kevin(a)koconnor.net> +# +# This file may be distributed under the terms of the GNU GPLv3 license. +import os, optparse, sys + +FLAG_OFFSET = 16 + +def main(): + # Parse command-line arguments + usage = "%prog <input_file> <output_file>" + opts = optparse.OptionParser(usage) + options, args = opts.parse_args() + if len(args) != 2: + opts.error("Incorrect number of arguments") + infilename, outfilename = args + # Read input + f = open(infilename, "rb") + srcdata = f.read() + f.close() + # Update + outdata = bytearray(srcdata) + outdata[FLAG_OFFSET] = 0x01 # change ET_EXEC to ET_REL + # Write output + f = open(outfilename, "wb") + f.write(outdata) + f.close() + +if __name__ == '__main__': + main() -- 2.26.2

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[PATCH] virtio-scsi: fix boot prio detection by using correct lun
by Stefan Reiter 27 Jul '20

27 Jul '20

Commits d6bdb85eb0 virtio-scsi: skip initializing non-bootable devices f82e82a5ab2 virtio-mmio: add support for scsi devices. both use the lun value from tmpl_drv, which is always 0, instead of the correct one passed as a seperate parameter. This causes systems where LUNs other than 0 are set as bootable, but 0 is not, to not boot. Signed-off-by: Stefan Reiter <s.reiter(a)proxmox.com> --- src/hw/virtio-scsi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/src/hw/virtio-scsi.c b/src/hw/virtio-scsi.c index 59f1c65..369c981 100644 --- a/src/hw/virtio-scsi.c +++ b/src/hw/virtio-scsi.c @@ -126,14 +126,14 @@ virtio_scsi_add_lun(u32 lun, struct drive_s *tmpl_drv) int prio = -1; if (tmpl_vlun->pci) - prio = bootprio_find_scsi_device(tmpl_vlun->pci, tmpl_vlun->target, tmpl_vlun->lun); + prio = bootprio_find_scsi_device(tmpl_vlun->pci, tmpl_vlun->target, lun); if (tmpl_vlun->mmio) - prio = bootprio_find_scsi_mmio_device(tmpl_vlun->mmio, tmpl_vlun->target, tmpl_vlun->lun); + prio = bootprio_find_scsi_mmio_device(tmpl_vlun->mmio, tmpl_vlun->target, lun); if (skip_nonbootable && prio < 0) { dprintf(1, "skipping init of a non-bootable virtio-scsi dev at %s," " target %d, lun %d\n", - tmpl_vlun->name, tmpl_vlun->target, tmpl_vlun->lun); + tmpl_vlun->name, tmpl_vlun->target, lun); return -1; } -- 2.20.1

2 1

ps2port: `keyboard self test failed (got ab not 0xaa)`
by Paul Menzel 25 Jul '20

25 Jul '20

Dear SeaBIOS folks, On the laptop TUXEDO Book BU1406 (Clevo N240BU) with coreboot [1] and SeaBIOS master, the internal PS/2 keyboard often does not work. SeaBIOS (version rel-1.13.0-45-g6ada228) […] /7aa38000\ Start thread |7aa38000| Discarding ps2 data 41 (status=13) Searching bootorder for: HALT /7aa35000\ Start thread Found 0 lpt ports Found 0 serial ports |7aa38000| keyboard self test failed (got ab not 0xaa) \7aa38000/ End thread […] Kind regards, Paul [1]: https://review.coreboot.org/c/coreboot/+/43760/ "mb/clevo/kbl-u: Add Clevo N240BU as variant"

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recent ld built for x86_64 fails to accept 16bit code as input (seabios build)
by Michael Tokarev 25 Jul '20

25 Jul '20

Hello! To clarify from the very beginning, I don't know how this part of the larger picture actually works. The end result is that seabios project, with the current source tarball available for download from https://www.seabios.org/downloads/seabios-1.13.0.tar.gz , can't be built using GNU ld as of version 2.34.90.20200706. Here's the relevant output: seabios-1.13.0 $ make silentoldconfig seabios-1.13.0 $ make V=1 PYTHON=python3 ... Linking out/rom16.o ld -T out/romlayout16.lds out/code16.o -o out/rom16.o Stripping out/rom16.strip.o strip out/rom16.o -o out/rom16.strip.o Linking out/rom.o ld -N -T out/romlayout32flat.lds out/rom16.strip.o out/rom32seg.strip.o out/code32flat.o -o out/rom.o ld: cannot use executable file 'out/rom16.strip.o' as input to a link make: *** [Makefile:187: out/rom.o] Error 1 seabios-1.13.0 $ _ Previous versions of ld accepted this file just fine and produced valid out/bios.bin in the end. I dunno if this is a problem is seabios (which has actually been already reported to seabios by Paul Menzel today), or an issue in ld. These ROMs/firmwares are a bit tricky to build.. Thanks! /mjt

10 19

[PATCH] ldnoexec: Add script to remove ET_EXEC flag from intermediate build objects
by Kevin O'Connor 24 Jul '20

24 Jul '20

Add a script to remove the ET_EXEC flag from the 16bit and "32bit segmented" intermediate objects. This avoids build failures with some linkers that will not allow linking these objects again. Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- Makefile | 9 +++++---- scripts/ldnoexec.py | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+), 4 deletions(-) create mode 100755 scripts/ldnoexec.py diff --git a/Makefile b/Makefile index c20be15..3d8943e 100644 --- a/Makefile +++ b/Makefile @@ -127,9 +127,10 @@ $(Q)printf '$(foreach i,$2,#include "$i"\n)' > $3.tmp.c $(Q)$(CC) -I. $1 $(CFLAGSWHOLE) -c $3.tmp.c -o $3 endef -%.strip.o: %.o +%.noexec.o: %.o @echo " Stripping $@" - $(Q)$(STRIP) $< -o $@ + $(Q)$(STRIP) $< -o $<.strip.o + $(Q)$(PYTHON) ./scripts/ldnoexec.py $<.strip.o $@ $(OUT)%.s: %.c @echo " Compiling to assembler $@" @@ -185,9 +186,9 @@ $(OUT)rom32seg.o: $(OUT)code32seg.o $(OUT)romlayout32seg.lds @echo " Linking $@" $(Q)$(LD) -T $(OUT)romlayout32seg.lds $< -o $@ -$(OUT)rom.o: $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds +$(OUT)rom.o: $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds @echo " Linking $@" - $(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o -o $@ + $(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o -o $@ $(OUT)bios.bin.prep: $(OUT)rom.o scripts/checkrom.py @echo " Prepping $@" diff --git a/scripts/ldnoexec.py b/scripts/ldnoexec.py new file mode 100755 index 0000000..b0b32d4 --- /dev/null +++ b/scripts/ldnoexec.py @@ -0,0 +1,32 @@ +#!/usr/bin/env python2 +# Script to remove EXEC flag from an ELF file +# +# Copyright (C) 2020 Kevin O'Connor <kevin(a)koconnor.net> +# +# This file may be distributed under the terms of the GNU GPLv3 license. +import os, optparse, sys + +FLAG_OFFSET = 16 + +def main(): + # Parse command-line arguments + usage = "%prog <input_file> <output_file>" + opts = optparse.OptionParser(usage) + options, args = opts.parse_args() + if len(args) != 2: + opts.error("Incorrect number of arguments") + infilename, outfilename = args + # Read input + f = open(infilename, "rb") + srcdata = f.read() + f.close() + # Update + outdata = bytearray(srcdata) + outdata[FLAG_OFFSET] = 0x01 # change ET_EXEC to ET_REL + # Write output + f = open(outfilename, "wb") + f.write(outdata) + f.close() + +if __name__ == '__main__': + main() -- 2.26.2

2 2

[PATCH] vgabios: Fix preserve memory flag in handle_1000
by Kevin O'Connor 16 Jul '20

16 Jul '20

Commit 5108c69c made a change to the ordering of some code which broke the check for the MF_NOCLEARMEM flag. Reported by felix.von.s(a)posteo.de Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- vgasrc/vgabios.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/vgasrc/vgabios.c b/vgasrc/vgabios.c index 3b9694c..198ee55 100644 --- a/vgasrc/vgabios.c +++ b/vgasrc/vgabios.c @@ -336,6 +336,9 @@ static void handle_1000(struct bregs *regs) { int mode = regs->al & 0x7f; + int flags = MF_LEGACY | (GET_BDA(modeset_ctl) & (MF_NOPALETTE|MF_GRAYSUM)); + if (regs->al & 0x80) + flags |= MF_NOCLEARMEM; // Set regs->al if (mode > 7) @@ -345,10 +348,6 @@ handle_1000(struct bregs *regs) else regs->al = 0x30; - int flags = MF_LEGACY | (GET_BDA(modeset_ctl) & (MF_NOPALETTE|MF_GRAYSUM)); - if (regs->al & 0x80) - flags |= MF_NOCLEARMEM; - vga_set_mode(mode, flags); } -- 2.26.2

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SeaBIOS July 2020