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

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)