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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-02-05 12:04:47 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2016-02-11 18:33:39 +0300 |
| commit | b48da55830c40077deafdda388feb819c8c19431 (patch) | |
| tree | 2d21be00856b8b186d77f0a7f1b9f44830a4c7c9 | |
| parent | 538bf4694898b19e76f32d554cc16135cf37b51c (diff) | |
| download | linux-b48da55830c40077deafdda388feb819c8c19431.tar.xz | |
ARM: 8514/1: remove duplicate definitions of __vectors_start and __stubs_start
Commit b9b32bf70f2f ("ARM: use linker magic for vectors and vector stubs")
introduced new global definitions of __vectors_start and __stubs_start,
and changed the existing ones to have internal linkage only. However, these
symbols are still visible to kallsyms, and due to the way the .vectors and
.stubs sections are emitted at the base of the VMA space, these duplicate
definitions have conflicting values.
$ nm -n vmlinux |grep -E __vectors|__stubs
00000000 t __vectors_start
00001000 t __stubs_start
c0e77000 T __vectors_start
c0e77020 T __stubs_start
This is completely harmless by itself, since the wrong values are local
symbols that cannot be referenced by other object files directly. However,
since these symbols are also listed in the kallsyms symbol table in some
cases (i.e., CONFIG_KALLSYMS_ALL=y and CONFIG_XIP_KERNEL=y), having these
conflicting values can be confusing. So either remove them, or make them
strictly local.
Acked-by: Chris Brandt <chris.brandt@renesas.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 3ce377f7251f..788e40c1254f 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -1064,7 +1064,6 @@ ENDPROC(vector_\name) .endm .section .stubs, "ax", %progbits -__stubs_start: @ This must be the first word .word vector_swi @@ -1206,10 +1205,10 @@ vector_addrexcptn: .equ vector_fiq_offset, vector_fiq .section .vectors, "ax", %progbits -__vectors_start: +.L__vectors_start: W(b) vector_rst W(b) vector_und - W(ldr) pc, __vectors_start + 0x1000 + W(ldr) pc, .L__vectors_start + 0x1000 W(b) vector_pabt W(b) vector_dabt W(b) vector_addrexcptn |