Commit 1d5a436d authored Jul 05, 2012 by Stephen Rothwell Committed by Benjamin Herrenschmidt Jul 11, 2012

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>

parent 18ad51dd

arch/powerpc/lib/crtsavres.S

+4 −1

Original line number	Diff line number	Diff line
		@@ -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)