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>

6 files changed, 5 insertions, 13 deletions

diff --git a/src/arch/arm/Makefile.inc b/src/arch/arm/Makefile.inc
index 27424142a1..013a4dda75 100644
--- a/src/arch/arm/Makefile.inc
+++ b/src/arch/arm/Makefile.inc
@@ -68,9 +68,9 @@ endif # CONFIG_ARCH_BOOTBLOCK_ARM
 
 ifeq ($(CONFIG_ARCH_VERSTAGE_ARM),y)
 
-$(objcbfs)/verstage.debug: $(objgenerated)/libverstage.a $$(verstage-objs)
+$(objcbfs)/verstage.debug: $$(verstage-objs)
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(LD_verstage) $(LDFLAGS_verstage) -o $@ -L$(obj) -T $(call src-to-obj,verstage,src/mainboard/$(MAINBOARDDIR)/memlayout.ld) --whole-archive --start-group $(filter-out %.ld,$(verstage-objs)) $(objgenerated)/libverstage.a --end-group
+	$(LD_verstage) $(LDFLAGS_verstage) -o $@ -L$(obj) -T $(call src-to-obj,verstage,src/mainboard/$(MAINBOARDDIR)/memlayout.ld) --whole-archive --start-group $(filter-out %.ld,$(verstage-objs)) --end-group
 
 verstage-y += boot.c
 verstage-y += div0.c
diff --git a/src/arch/arm/armv4/Makefile.inc b/src/arch/arm/armv4/Makefile.inc
index 1b91961f7e..e8e49a60a8 100644
--- a/src/arch/arm/armv4/Makefile.inc
+++ b/src/arch/arm/armv4/Makefile.inc
@@ -39,7 +39,6 @@ endif # CONFIG_ARCH_BOOTBLOCK_ARMV4
 ################################################################################
 
 ifeq ($(CONFIG_ARCH_VERSTAGE_ARMV4),y)
-libverstage-generic-ccopts += $(armv4_flags)
 verstage-generic-ccopts += $(armv4_flags)
 
 verstage-y += cache.c
diff --git a/src/arch/arm/armv7/Makefile.inc b/src/arch/arm/armv7/Makefile.inc
index d978f00fae..fe0b446623 100644
--- a/src/arch/arm/armv7/Makefile.inc
+++ b/src/arch/arm/armv7/Makefile.inc
@@ -71,8 +71,6 @@ endif # CONFIG_ARCH_BOOTBLOCK_ARMV7
 ################################################################################
 
 ifeq ($(CONFIG_ARCH_VERSTAGE_ARMV7),y)
-libverstage-generic-ccopts += $(armv7-a_flags)
-libverstage-S-ccopts += $(armv7_asm_flags)
 verstage-generic-ccopts += $(armv7-a_flags)
 verstage-S-ccopts += $(armv7_asm_flags)
 
@@ -83,14 +81,10 @@ verstage-y += exception_asm.S
 verstage-y += mmu.c
 
 else ifeq ($(CONFIG_ARCH_VERSTAGE_ARMV7_M),y)
-libverstage-generic-ccopts += $(armv7-m_flags)
-libverstage-S-ccopts += $(armv7_asm_flags)
 verstage-generic-ccopts += $(armv7-m_flags)
 verstage-S-ccopts += $(armv7_asm_flags)
 
 else ifeq ($(CONFIG_ARCH_VERSTAGE_ARMV7_R),y)
-libverstage-generic-ccopts += $(armv7-r_flags)
-libverstage-S-ccopts += $(armv7-r_asm_flags)
 verstage-generic-ccopts += $(armv7-r_flags)
 verstage-S-ccopts += $(armv7-r_asm_flags)
 
diff --git a/src/arch/arm64/Makefile.inc b/src/arch/arm64/Makefile.inc
index 7f3ce3fb96..ad3941b099 100644
--- a/src/arch/arm64/Makefile.inc
+++ b/src/arch/arm64/Makefile.inc
@@ -65,9 +65,9 @@ endif # CONFIG_ARCH_BOOTBLOCK_ARM64
 
 ifeq ($(CONFIG_ARCH_VERSTAGE_ARM64),y)
 
-$(objcbfs)/verstage.debug: $(objgenerated)/libverstage.a $$(verstage-objs)
+$(objcbfs)/verstage.debug: $$(verstage-objs)
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	$(LD_verstage) $(LDFLAGS_verstage) -o $@ -L$(obj) --whole-archive --start-group $(filter-out %.ld,$(verstage-objs)) $(objgenerated)/libverstage.a --end-group -T $(call src-to-obj,verstage,src/mainboard/$(MAINBOARDDIR)/memlayout.ld)
+	$(LD_verstage) $(LDFLAGS_verstage) -o $@ -L$(obj) --whole-archive --start-group $(filter-out %.ld,$(verstage-objs)) --end-group -T $(call src-to-obj,verstage,src/mainboard/$(MAINBOARDDIR)/memlayout.ld)
 
 verstage-y += boot.c
 verstage-y += div0.c
diff --git a/src/arch/arm64/armv8/Makefile.inc b/src/arch/arm64/armv8/Makefile.inc
index f026a99b23..a7a6b19f9f 100644
--- a/src/arch/arm64/armv8/Makefile.inc
+++ b/src/arch/arm64/armv8/Makefile.inc
@@ -53,7 +53,6 @@ verstage-y += cpu.S
 verstage-y += cache_helpers.S
 verstage-y += exception.c
 
-libverstage-generic-ccopts += $(armv8_flags)
 verstage-generic-ccopts += $(armv8_flags)
 
 endif
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))