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authorJulius Werner <jwerner@chromium.org>2017-03-20 15:32:15 -0700
committerJulius Werner <jwerner@chromium.org>2017-03-28 22:18:53 +0200
commite91d170d21b295f1f4a5b89644c6cbe4f3e85ff1 (patch)
treeeeae08776f5324acc803c47cd7e5a48d7c32a604 /src/arch/x86
parent58c3938705af5dd96456216a17d579868e0f5b77 (diff)
Remove libverstage as separate library and source file class
In builds without CONFIG_VBOOT_SEPARATE_VERSTAGE, verstage files are linked directly into the bootblock or the romstage. However, they're still compiled with a separate "libverstage" source file class, linked into an intermediate library and then linked into the final destination stage. There is no obvious benefit to doing it this way and it's unclear why it was chosen in the first place... there are, however, obvious disadvantages: it can result in code that is used by both libverstage and the host stage to occur twice in the output binary. It also means that libverstage files have their separate compiler flags that are not necessarily aligned with the host stage, which can lead to weird effects like <rules.h> macros not being set the way you would expect. In fact, VBOOT_STARTS_IN_ROMSTAGE configurations are currently broken on x86 because their libverstage code that gets compiled into the romstage sets ENV_VERSTAGE, but CAR migration code expects all ENV_VERSTAGE code to run pre-migration. This patch resolves these problems by removing the separate library. There is no more difference between the 'verstage' and 'libverstage' classes, and the source files added to them are just treated the same way a bootblock or romstage source files in configurations where the verstage is linked into either of these respective stages (allowing for the normal object code deduplication and causing those files to be compiled with the same flags as the host stage's files). Tested this whole series by booting a Kevin, an Elm (both with and without SEPARATE_VERSTAGE) and a Falco in normal and recovery mode. Change-Id: I6bb84a9bf1cd54f2e02ca1f665740a9c88d88df4 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/18302 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/arch/x86')
-rw-r--r--src/arch/x86/Makefile.inc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 332e8ec6f6..5f184c5d96 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -186,7 +186,7 @@ verstage-$(CONFIG_C_ENVIRONMENT_BOOTBLOCK) += verstage.c
verstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
-verstage-libs += $(objgenerated)/libverstage.a
+verstage-libs ?=
$(eval $(call early_x86_assembly_entry_rule,verstage))