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Commit 8fe9c93e authored by Andreas Schwab's avatar Andreas Schwab Committed by Benjamin Herrenschmidt
Browse files

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: default avatarAndreas Schwab <schwab@linux-m68k.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent dece8ada

arch/powerpc/lib/crtsavres.S

+186 −0
Original line number Diff line number Diff line
@@ -231,6 +231,87 @@ _GLOBAL(_rest32gpr_31_x) 
	mr	1,11

	blr



#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 */



#else /* CONFIG_PPC64 */



	.section ".text.save.restore","ax",@progbits
@@ -356,6 +437,111 @@ _restgpr0_31: 
	mtlr	r0

	blr



#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 */



#endif /* CONFIG_PPC64 */



#endif

scripts/mod/modpost.c

+6 −2
Original line number Diff line number Diff line
@@ -584,12 +584,16 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname) 
		if (strncmp(symname, "_restgpr_", sizeof("_restgpr_") - 1) == 0 ||

		    strncmp(symname, "_savegpr_", sizeof("_savegpr_") - 1) == 0 ||

		    strncmp(symname, "_rest32gpr_", sizeof("_rest32gpr_") - 1) == 0 ||

		    strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0)

		    strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0 ||

		    strncmp(symname, "_restvr_", sizeof("_restvr_") - 1) == 0 ||

		    strncmp(symname, "_savevr_", sizeof("_savevr_") - 1) == 0)

			return 1;

	if (info->hdr->e_machine == EM_PPC64)

		/* Special register function linked on all modules during final link of .ko */

		if (strncmp(symname, "_restgpr0_", sizeof("_restgpr0_") - 1) == 0 ||

		    strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0)

		    strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0 ||

		    strncmp(symname, "_restvr_", sizeof("_restvr_") - 1) == 0 ||

		    strncmp(symname, "_savevr_", sizeof("_savevr_") - 1) == 0)

			return 1;

	/* Do not ignore this symbol */

	return 0;