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kernel-ark/arch/powerpc/lib/crtsavres.S

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[POWERPC] Fix -Os kernel builds with newer gcc versions GCC 4.4.x looks to be adding support for generating out-of-line register saves/restores based on: http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html This breaks the kernel if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE. To fix this we add the use the save/restore code from gcc and simplified it down for our needs (integer only). Additionally, we have to link this code into each module. The other solution was to add EXPORT_SYMBOL() which meant going through the trampoline which seemed nonsensical for these out-of-line routines. Finally, we add some checks to prom_init_check.sh to ignore the out-of-line save/restore functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-12 21:20:58 +00:00
/*
* Special support for eabi and SVR4
*
* Copyright (C) 1995, 1996, 1998, 2000, 2001 Free Software Foundation, Inc.
* Copyright 2008 Freescale Semiconductor, Inc.
* Written By Michael Meissner
*
* Based on gcc/config/rs6000/crtsavres.asm from gcc
powerpc: Fix module building for gcc 4.5 and 64 bit Gcc 4.5 is now generating out of line register save and restore in the function prefix and postfix when we use -Os. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-06-29 20:08:42 +00:00
* 64 bit additions from reading the PPC elf64abi document.
[POWERPC] Fix -Os kernel builds with newer gcc versions GCC 4.4.x looks to be adding support for generating out-of-line register saves/restores based on: http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html This breaks the kernel if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE. To fix this we add the use the save/restore code from gcc and simplified it down for our needs (integer only). Additionally, we have to link this code into each module. The other solution was to add EXPORT_SYMBOL() which meant going through the trampoline which seemed nonsensical for these out-of-line routines. Finally, we add some checks to prom_init_check.sh to ignore the out-of-line save/restore functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-12 21:20:58 +00:00
*
* This file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* In addition to the permissions in the GNU General Public License, the
* Free Software Foundation gives you unlimited permission to link the
* compiled version of this file with other programs, and to distribute
* those programs without any restriction coming from the use of this
* file. (The General Public License restrictions do apply in other
* respects; for example, they cover modification of the file, and
* distribution when not linked into another program.)
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* As a special exception, if you link this library with files
* compiled with GCC to produce an executable, this does not cause
* the resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*/
#include <asm/ppc_asm.h>
.file "crtsavres.S"
#ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
powerpc: Fix module building for gcc 4.5 and 64 bit Gcc 4.5 is now generating out of line register save and restore in the function prefix and postfix when we use -Os. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-06-29 20:08:42 +00:00
#ifndef CONFIG_PPC64
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>
2012-07-05 21:09:40 +00:00
.section ".text"
[POWERPC] Fix -Os kernel builds with newer gcc versions GCC 4.4.x looks to be adding support for generating out-of-line register saves/restores based on: http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html This breaks the kernel if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE. To fix this we add the use the save/restore code from gcc and simplified it down for our needs (integer only). Additionally, we have to link this code into each module. The other solution was to add EXPORT_SYMBOL() which meant going through the trampoline which seemed nonsensical for these out-of-line routines. Finally, we add some checks to prom_init_check.sh to ignore the out-of-line save/restore functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-12 21:20:58 +00:00
/* 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. */
_GLOBAL(_savegpr_14)
_GLOBAL(_save32gpr_14)
stw 14,-72(11) /* save gp registers */
_GLOBAL(_savegpr_15)
_GLOBAL(_save32gpr_15)
stw 15,-68(11)
_GLOBAL(_savegpr_16)
_GLOBAL(_save32gpr_16)
stw 16,-64(11)
_GLOBAL(_savegpr_17)
_GLOBAL(_save32gpr_17)
stw 17,-60(11)
_GLOBAL(_savegpr_18)
_GLOBAL(_save32gpr_18)
stw 18,-56(11)
_GLOBAL(_savegpr_19)
_GLOBAL(_save32gpr_19)
stw 19,-52(11)
_GLOBAL(_savegpr_20)
_GLOBAL(_save32gpr_20)
stw 20,-48(11)
_GLOBAL(_savegpr_21)
_GLOBAL(_save32gpr_21)
stw 21,-44(11)
_GLOBAL(_savegpr_22)
_GLOBAL(_save32gpr_22)
stw 22,-40(11)
_GLOBAL(_savegpr_23)
_GLOBAL(_save32gpr_23)
stw 23,-36(11)
_GLOBAL(_savegpr_24)
_GLOBAL(_save32gpr_24)
stw 24,-32(11)
_GLOBAL(_savegpr_25)
_GLOBAL(_save32gpr_25)
stw 25,-28(11)
_GLOBAL(_savegpr_26)
_GLOBAL(_save32gpr_26)
stw 26,-24(11)
_GLOBAL(_savegpr_27)
_GLOBAL(_save32gpr_27)
stw 27,-20(11)
_GLOBAL(_savegpr_28)
_GLOBAL(_save32gpr_28)
stw 28,-16(11)
_GLOBAL(_savegpr_29)
_GLOBAL(_save32gpr_29)
stw 29,-12(11)
_GLOBAL(_savegpr_30)
_GLOBAL(_save32gpr_30)
stw 30,-8(11)
_GLOBAL(_savegpr_31)
_GLOBAL(_save32gpr_31)
stw 31,-4(11)
blr
/* Routines for restoring 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 restore area. */
_GLOBAL(_restgpr_14)
_GLOBAL(_rest32gpr_14)
lwz 14,-72(11) /* restore gp registers */
_GLOBAL(_restgpr_15)
_GLOBAL(_rest32gpr_15)
lwz 15,-68(11)
_GLOBAL(_restgpr_16)
_GLOBAL(_rest32gpr_16)
lwz 16,-64(11)
_GLOBAL(_restgpr_17)
_GLOBAL(_rest32gpr_17)
lwz 17,-60(11)
_GLOBAL(_restgpr_18)
_GLOBAL(_rest32gpr_18)
lwz 18,-56(11)
_GLOBAL(_restgpr_19)
_GLOBAL(_rest32gpr_19)
lwz 19,-52(11)
_GLOBAL(_restgpr_20)
_GLOBAL(_rest32gpr_20)
lwz 20,-48(11)
_GLOBAL(_restgpr_21)
_GLOBAL(_rest32gpr_21)
lwz 21,-44(11)
_GLOBAL(_restgpr_22)
_GLOBAL(_rest32gpr_22)
lwz 22,-40(11)
_GLOBAL(_restgpr_23)
_GLOBAL(_rest32gpr_23)
lwz 23,-36(11)
_GLOBAL(_restgpr_24)
_GLOBAL(_rest32gpr_24)
lwz 24,-32(11)
_GLOBAL(_restgpr_25)
_GLOBAL(_rest32gpr_25)
lwz 25,-28(11)
_GLOBAL(_restgpr_26)
_GLOBAL(_rest32gpr_26)
lwz 26,-24(11)
_GLOBAL(_restgpr_27)
_GLOBAL(_rest32gpr_27)
lwz 27,-20(11)
_GLOBAL(_restgpr_28)
_GLOBAL(_rest32gpr_28)
lwz 28,-16(11)
_GLOBAL(_restgpr_29)
_GLOBAL(_rest32gpr_29)
lwz 29,-12(11)
_GLOBAL(_restgpr_30)
_GLOBAL(_rest32gpr_30)
lwz 30,-8(11)
_GLOBAL(_restgpr_31)
_GLOBAL(_rest32gpr_31)
lwz 31,-4(11)
blr
/* Routines for restoring 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 restore area. */
_GLOBAL(_restgpr_14_x)
_GLOBAL(_rest32gpr_14_x)
lwz 14,-72(11) /* restore gp registers */
_GLOBAL(_restgpr_15_x)
_GLOBAL(_rest32gpr_15_x)
lwz 15,-68(11)
_GLOBAL(_restgpr_16_x)
_GLOBAL(_rest32gpr_16_x)
lwz 16,-64(11)
_GLOBAL(_restgpr_17_x)
_GLOBAL(_rest32gpr_17_x)
lwz 17,-60(11)
_GLOBAL(_restgpr_18_x)
_GLOBAL(_rest32gpr_18_x)
lwz 18,-56(11)
_GLOBAL(_restgpr_19_x)
_GLOBAL(_rest32gpr_19_x)
lwz 19,-52(11)
_GLOBAL(_restgpr_20_x)
_GLOBAL(_rest32gpr_20_x)
lwz 20,-48(11)
_GLOBAL(_restgpr_21_x)
_GLOBAL(_rest32gpr_21_x)
lwz 21,-44(11)
_GLOBAL(_restgpr_22_x)
_GLOBAL(_rest32gpr_22_x)
lwz 22,-40(11)
_GLOBAL(_restgpr_23_x)
_GLOBAL(_rest32gpr_23_x)
lwz 23,-36(11)
_GLOBAL(_restgpr_24_x)
_GLOBAL(_rest32gpr_24_x)
lwz 24,-32(11)
_GLOBAL(_restgpr_25_x)
_GLOBAL(_rest32gpr_25_x)
lwz 25,-28(11)
_GLOBAL(_restgpr_26_x)
_GLOBAL(_rest32gpr_26_x)
lwz 26,-24(11)
_GLOBAL(_restgpr_27_x)
_GLOBAL(_rest32gpr_27_x)
lwz 27,-20(11)
_GLOBAL(_restgpr_28_x)
_GLOBAL(_rest32gpr_28_x)
lwz 28,-16(11)
_GLOBAL(_restgpr_29_x)
_GLOBAL(_rest32gpr_29_x)
lwz 29,-12(11)
_GLOBAL(_restgpr_30_x)
_GLOBAL(_rest32gpr_30_x)
lwz 30,-8(11)
_GLOBAL(_restgpr_31_x)
_GLOBAL(_rest32gpr_31_x)
lwz 0,4(11)
lwz 31,-4(11)
mtlr 0
mr 1,11
blr
powerpc: Fix module building for gcc 4.5 and 64 bit Gcc 4.5 is now generating out of line register save and restore in the function prefix and postfix when we use -Os. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-06-29 20:08:42 +00:00
powerpc: Add vr save/restore functions GCC 4.8 now generates out-of-line vr save/restore functions when optimizing for size. They are needed for the raid6 altivec support. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-12-30 14:31:17 +00:00
#ifdef CONFIG_ALTIVEC
/* Called with r0 pointing just beyond the end of the vector save area. */
_GLOBAL(_savevr_20)
li r11,-192
stvx vr20,r11,r0
_GLOBAL(_savevr_21)
li r11,-176
stvx vr21,r11,r0
_GLOBAL(_savevr_22)
li r11,-160
stvx vr22,r11,r0
_GLOBAL(_savevr_23)
li r11,-144
stvx vr23,r11,r0
_GLOBAL(_savevr_24)
li r11,-128
stvx vr24,r11,r0
_GLOBAL(_savevr_25)
li r11,-112
stvx vr25,r11,r0
_GLOBAL(_savevr_26)
li r11,-96
stvx vr26,r11,r0
_GLOBAL(_savevr_27)
li r11,-80
stvx vr27,r11,r0
_GLOBAL(_savevr_28)
li r11,-64
stvx vr28,r11,r0
_GLOBAL(_savevr_29)
li r11,-48
stvx vr29,r11,r0
_GLOBAL(_savevr_30)
li r11,-32
stvx vr30,r11,r0
_GLOBAL(_savevr_31)
li r11,-16
stvx vr31,r11,r0
blr
_GLOBAL(_restvr_20)
li r11,-192
lvx vr20,r11,r0
_GLOBAL(_restvr_21)
li r11,-176
lvx vr21,r11,r0
_GLOBAL(_restvr_22)
li r11,-160
lvx vr22,r11,r0
_GLOBAL(_restvr_23)
li r11,-144
lvx vr23,r11,r0
_GLOBAL(_restvr_24)
li r11,-128
lvx vr24,r11,r0
_GLOBAL(_restvr_25)
li r11,-112
lvx vr25,r11,r0
_GLOBAL(_restvr_26)
li r11,-96
lvx vr26,r11,r0
_GLOBAL(_restvr_27)
li r11,-80
lvx vr27,r11,r0
_GLOBAL(_restvr_28)
li r11,-64
lvx vr28,r11,r0
_GLOBAL(_restvr_29)
li r11,-48
lvx vr29,r11,r0
_GLOBAL(_restvr_30)
li r11,-32
lvx vr30,r11,r0
_GLOBAL(_restvr_31)
li r11,-16
lvx vr31,r11,r0
blr
#endif /* CONFIG_ALTIVEC */
powerpc: Fix module building for gcc 4.5 and 64 bit Gcc 4.5 is now generating out of line register save and restore in the function prefix and postfix when we use -Os. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-06-29 20:08:42 +00:00
#else /* CONFIG_PPC64 */
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>
2012-07-05 21:09:40 +00:00
.section ".text.save.restore","ax",@progbits
powerpc: Fix module building for gcc 4.5 and 64 bit Gcc 4.5 is now generating out of line register save and restore in the function prefix and postfix when we use -Os. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-06-29 20:08:42 +00:00
.globl _savegpr0_14
_savegpr0_14:
std r14,-144(r1)
.globl _savegpr0_15
_savegpr0_15:
std r15,-136(r1)
.globl _savegpr0_16
_savegpr0_16:
std r16,-128(r1)
.globl _savegpr0_17
_savegpr0_17:
std r17,-120(r1)
.globl _savegpr0_18
_savegpr0_18:
std r18,-112(r1)
.globl _savegpr0_19
_savegpr0_19:
std r19,-104(r1)
.globl _savegpr0_20
_savegpr0_20:
std r20,-96(r1)
.globl _savegpr0_21
_savegpr0_21:
std r21,-88(r1)
.globl _savegpr0_22
_savegpr0_22:
std r22,-80(r1)
.globl _savegpr0_23
_savegpr0_23:
std r23,-72(r1)
.globl _savegpr0_24
_savegpr0_24:
std r24,-64(r1)
.globl _savegpr0_25
_savegpr0_25:
std r25,-56(r1)
.globl _savegpr0_26
_savegpr0_26:
std r26,-48(r1)
.globl _savegpr0_27
_savegpr0_27:
std r27,-40(r1)
.globl _savegpr0_28
_savegpr0_28:
std r28,-32(r1)
.globl _savegpr0_29
_savegpr0_29:
std r29,-24(r1)
.globl _savegpr0_30
_savegpr0_30:
std r30,-16(r1)
.globl _savegpr0_31
_savegpr0_31:
std r31,-8(r1)
std r0,16(r1)
blr
.globl _restgpr0_14
_restgpr0_14:
ld r14,-144(r1)
.globl _restgpr0_15
_restgpr0_15:
ld r15,-136(r1)
.globl _restgpr0_16
_restgpr0_16:
ld r16,-128(r1)
.globl _restgpr0_17
_restgpr0_17:
ld r17,-120(r1)
.globl _restgpr0_18
_restgpr0_18:
ld r18,-112(r1)
.globl _restgpr0_19
_restgpr0_19:
ld r19,-104(r1)
.globl _restgpr0_20
_restgpr0_20:
ld r20,-96(r1)
.globl _restgpr0_21
_restgpr0_21:
ld r21,-88(r1)
.globl _restgpr0_22
_restgpr0_22:
ld r22,-80(r1)
.globl _restgpr0_23
_restgpr0_23:
ld r23,-72(r1)
.globl _restgpr0_24
_restgpr0_24:
ld r24,-64(r1)
.globl _restgpr0_25
_restgpr0_25:
ld r25,-56(r1)
.globl _restgpr0_26
_restgpr0_26:
ld r26,-48(r1)
.globl _restgpr0_27
_restgpr0_27:
ld r27,-40(r1)
.globl _restgpr0_28
_restgpr0_28:
ld r28,-32(r1)
.globl _restgpr0_29
_restgpr0_29:
ld r0,16(r1)
ld r29,-24(r1)
mtlr r0
ld r30,-16(r1)
ld r31,-8(r1)
blr
.globl _restgpr0_30
_restgpr0_30:
ld r30,-16(r1)
.globl _restgpr0_31
_restgpr0_31:
ld r0,16(r1)
ld r31,-8(r1)
mtlr r0
blr
powerpc: Add vr save/restore functions GCC 4.8 now generates out-of-line vr save/restore functions when optimizing for size. They are needed for the raid6 altivec support. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-12-30 14:31:17 +00:00
#ifdef CONFIG_ALTIVEC
/* Called with r0 pointing just beyond the end of the vector save area. */
.globl _savevr_20
_savevr_20:
li r12,-192
stvx vr20,r12,r0
.globl _savevr_21
_savevr_21:
li r12,-176
stvx vr21,r12,r0
.globl _savevr_22
_savevr_22:
li r12,-160
stvx vr22,r12,r0
.globl _savevr_23
_savevr_23:
li r12,-144
stvx vr23,r12,r0
.globl _savevr_24
_savevr_24:
li r12,-128
stvx vr24,r12,r0
.globl _savevr_25
_savevr_25:
li r12,-112
stvx vr25,r12,r0
.globl _savevr_26
_savevr_26:
li r12,-96
stvx vr26,r12,r0
.globl _savevr_27
_savevr_27:
li r12,-80
stvx vr27,r12,r0
.globl _savevr_28
_savevr_28:
li r12,-64
stvx vr28,r12,r0
.globl _savevr_29
_savevr_29:
li r12,-48
stvx vr29,r12,r0
.globl _savevr_30
_savevr_30:
li r12,-32
stvx vr30,r12,r0
.globl _savevr_31
_savevr_31:
li r12,-16
stvx vr31,r12,r0
blr
.globl _restvr_20
_restvr_20:
li r12,-192
lvx vr20,r12,r0
.globl _restvr_21
_restvr_21:
li r12,-176
lvx vr21,r12,r0
.globl _restvr_22
_restvr_22:
li r12,-160
lvx vr22,r12,r0
.globl _restvr_23
_restvr_23:
li r12,-144
lvx vr23,r12,r0
.globl _restvr_24
_restvr_24:
li r12,-128
lvx vr24,r12,r0
.globl _restvr_25
_restvr_25:
li r12,-112
lvx vr25,r12,r0
.globl _restvr_26
_restvr_26:
li r12,-96
lvx vr26,r12,r0
.globl _restvr_27
_restvr_27:
li r12,-80
lvx vr27,r12,r0
.globl _restvr_28
_restvr_28:
li r12,-64
lvx vr28,r12,r0
.globl _restvr_29
_restvr_29:
li r12,-48
lvx vr29,r12,r0
.globl _restvr_30
_restvr_30:
li r12,-32
lvx vr30,r12,r0
.globl _restvr_31
_restvr_31:
li r12,-16
lvx vr31,r12,r0
blr
#endif /* CONFIG_ALTIVEC */
powerpc: Fix module building for gcc 4.5 and 64 bit Gcc 4.5 is now generating out of line register save and restore in the function prefix and postfix when we use -Os. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-06-29 20:08:42 +00:00
#endif /* CONFIG_PPC64 */
[POWERPC] Fix -Os kernel builds with newer gcc versions GCC 4.4.x looks to be adding support for generating out-of-line register saves/restores based on: http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html This breaks the kernel if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE. To fix this we add the use the save/restore code from gcc and simplified it down for our needs (integer only). Additionally, we have to link this code into each module. The other solution was to add EXPORT_SYMBOL() which meant going through the trampoline which seemed nonsensical for these out-of-line routines. Finally, we add some checks to prom_init_check.sh to ignore the out-of-line save/restore functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-12 21:20:58 +00:00
#endif
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