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Give kernel image a header.

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Kernel image now has a header with version, magic number, and a
pointer to its actual entrypoint. Entry point is now _start in
boot.s, and we now generate versions.s in the build tree for the
version macros.
This commit is contained in:
Justin C. Miller
2018-03-24 18:34:44 -07:00
parent d438392ed5
commit e19c7cee50
11 changed files with 246 additions and 28 deletions
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7
modules.mk
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@@ -16,13 +16,16 @@ MOD_BUILD_D := $(BUILD_D)/d.$(MOD_NAME)
MOD_LIBNAME := $(BUILD_D)/lib$(MOD_NAME).a
MOD_TARGETS += $(MOD_LIBNAME)
OBJS_$(MOD_NAME) := $(patsubst %.c,build/d.%.o,$(patsubst src/modules/%,%,$(SOURCES)))
OBJS_$(MOD_NAME) := $(patsubst %,build/d.%.o,$(patsubst src/modules/%,%,$(SOURCES)))
$(MOD_LIBNAME): $(OBJS_$(MOD_NAME))
$(AR) cr $@ $(OBJS_$(MOD_NAME))
$(MOD_BUILD_D)/%.o: $(MOD_SRC_D)/%.c $(INIT_DEP)
$(MOD_BUILD_D)/%.c.o: $(MOD_SRC_D)/%.c $(INIT_DEP)
$(CC) $(CFLAGS) -c -o $@ $<
$(MOD_BUILD_D)/%.s.o: $(MOD_SRC_D)/%.s $(BUILD_D)/versions.s $(INIT_DEP)
$(AS) $(ASFLAGS) -o $@ $<
DEPS += $(patsubst %.o,%.d,$(OBJS_$(MOD_NAME)))