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powerpc: Put the gpr save/restore functions in their own section

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This allows the linker to know that calls to them do not need to switch
TOC and stop errors like the following when linking large configurations:

powerpc64-linux-ld: drivers/built-in.o: In function `.gpiochip_is_requested':
(.text+0x4): sibling call optimization to `_savegpr0_29' does not allow automatic multiple TOCs; recompile with -mminimal-toc or -fno-optimize-sibling-calls, or make `_savegpr0_29' extern

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Stephen Rothwell 2012-07-05 21:09:40 +00:00 committed by Benjamin Herrenschmidt
parent 18ad51dd34
commit 1d5a436d2c
1 changed files with 4 additions and 1 deletions
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5
arch/powerpc/lib/crtsavres.S
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@ -41,12 +41,13 @@
#include <asm/ppc_asm.h>
.file "crtsavres.S"
.section ".text"
#ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
#ifndef CONFIG_PPC64
.section ".text"
/* Routines for saving integer registers, called by the compiler. */
/* Called with r11 pointing to the stack header word of the caller of the */
/* function, just beyond the end of the integer save area. */
@ -232,6 +233,8 @@ _GLOBAL(_rest32gpr_31_x)
#else /* CONFIG_PPC64 */
.section ".text.save.restore","ax",@progbits
.globl _savegpr0_14
_savegpr0_14:
std r14,-144(r1)