powerpc: Set entry point and text address in linker script
Currently we set the kernel entry point and the address of the text
section in the Makefile, using CONFIG_KERNEL_START.
But we've already got <asm/page.h> in the linker script, so we can just
use KERNELBASE directly. That means if we ever change KERNELBASE there's
one less place to change it.
And we can set the entry point with ENTRY().
There are zero differences from "readelf -a vmlinux" with or without this
patch.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 2f4cce0..5bc11bd 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -12,9 +12,6 @@
# Rewritten by Cort Dougan and Paul Mackerras
#
-# This must match PAGE_OFFSET in include/asm-powerpc/page.h.
-KERNELLOAD := $(CONFIG_KERNEL_START)
-
HAS_BIARCH := $(call cc-option-yn, -m32)
ifeq ($(CONFIG_PPC64),y)
@@ -59,7 +56,7 @@
override CC += -m$(SZ)
endif
-LDFLAGS_vmlinux := -Ttext $(KERNELLOAD) -Bstatic -e $(KERNELLOAD)
+LDFLAGS_vmlinux := -Bstatic
# The -Iarch/$(ARCH)/include is temporary while we are merging
CPPFLAGS += -Iarch/$(ARCH) -Iarch/$(ARCH)/include
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index d4dfcfb..9ceaa7a 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -1,11 +1,9 @@
#include <linux/config.h>
-#ifdef CONFIG_PPC64
#include <asm/page.h>
-#else
-#define PAGE_SIZE 4096
-#endif
#include <asm-generic/vmlinux.lds.h>
+ENTRY(_stext)
+
#ifdef CONFIG_PPC64
OUTPUT_ARCH(powerpc:common64)
jiffies = jiffies_64;
@@ -21,6 +19,7 @@
*(.exit.data)
}
+ . = KERNELBASE;
/* Read-only sections, merged into text segment: */
#ifdef CONFIG_PPC32