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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-07-04 15:03:31 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-12 05:35:20 +0400 |
| commit | 0477cd427e4862843b6cfb460b83ca09f265742d (patch) | |
| tree | d7e4e7ff91e3f73196a18d93b8cdbef34e988522 /arch/arm | |
| parent | b85796fa1987e014a61c379e3cb753976e993a46 (diff) | |
| download | linux-0477cd427e4862843b6cfb460b83ca09f265742d.tar.xz | |
ARM: use linker magic for vectors and vector stubs
commit b9b32bf70f2fb710b07c94e13afbc729afe221da upstream.
Use linker magic to create the vectors and vector stubs: we can tell the
linker to place them at an appropriate VMA, but keep the LMA within the
kernel. This gets rid of some unnecessary symbol manipulation, and
have the linker calculate the relocations appropriately.
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 28 | ||||
| -rw-r--r-- | arch/arm/kernel/vmlinux.lds.S | 17 |
2 files changed, 27 insertions, 18 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index bc2180d3f6ec..12ac1e336645 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -992,7 +992,7 @@ ENDPROC(vector_\name) 1: .endm - .globl __stubs_start + .section .stubs, "ax", %progbits __stubs_start: @ This must be the first word .word vector_swi @@ -1119,24 +1119,16 @@ vector_addrexcptn: vector_fiq: subs pc, lr, #4 - .globl __stubs_end -__stubs_end: - - .equ stubs_offset, __vectors_start + 0x1000 - __stubs_start - - .globl __vectors_start + .section .vectors, "ax", %progbits __vectors_start: - W(b) vector_rst + stubs_offset - W(b) vector_und + stubs_offset - W(ldr) pc, .LCvswi + stubs_offset - W(b) vector_pabt + stubs_offset - W(b) vector_dabt + stubs_offset - W(b) vector_addrexcptn + stubs_offset - W(b) vector_irq + stubs_offset - W(b) vector_fiq + stubs_offset - - .globl __vectors_end -__vectors_end: + W(b) vector_rst + W(b) vector_und + W(ldr) pc, __vectors_start + 0x1000 + W(b) vector_pabt + W(b) vector_dabt + W(b) vector_addrexcptn + W(b) vector_irq + W(b) vector_fiq .data diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index a871b8e00fca..33f2ea32f5a0 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -152,6 +152,23 @@ SECTIONS . = ALIGN(PAGE_SIZE); __init_begin = .; #endif + /* + * The vectors and stubs are relocatable code, and the + * only thing that matters is their relative offsets + */ + __vectors_start = .; + .vectors 0 : AT(__vectors_start) { + *(.vectors) + } + . = __vectors_start + SIZEOF(.vectors); + __vectors_end = .; + + __stubs_start = .; + .stubs 0x1000 : AT(__stubs_start) { + *(.stubs) + } + . = __stubs_start + SIZEOF(.stubs); + __stubs_end = .; INIT_TEXT_SECTION(8) .exit.text : { |