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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/openzfs/module/lua/setjmp/setjmp_ppc.S
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/*	$FreeBSD$  */

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/*	from:	NetBSD: setjmp.S,v 1.1 1998/01/27 15:13:12 sakamoto Exp $  */

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/*	from:	OpenBSD: setjmp.S,v 1.2 1996/12/28 06:22:18 rahnds Exp 	*/

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/* kernel version of this file, does not have signal goop */

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/* int setjmp(jmp_buf env) */

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#define	_ASM

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#include <asm/types.h>

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#ifdef __powerpc64__

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#if !defined(PPC64_ELF_ABI_v2) && !defined(PPC64_ELF_ABI_v1)

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#if defined(_CALL_ELF) && _CALL_ELF == 2

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#define	PPC64_ELF_ABI_v2

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#endif /* _CALL_ELF */

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#endif /* PPC64_ELF_ABI_ */

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#endif /* __powerpc64__ */

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#ifdef __powerpc64__

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#define LD_REG	ld

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#define	ST_REG	std

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#define	REGWIDTH 8

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#else

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#define	LD_REG	lwz

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#define	ST_REG	stw

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#define	REGWIDTH 4

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#endif /* __powerpc64__ */

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#define JMP_r1	1*REGWIDTH

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#define JMP_r2	2*REGWIDTH

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#define JMP_r14	3*REGWIDTH

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#define JMP_r15 4*REGWIDTH

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#define JMP_r16 5*REGWIDTH

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#define JMP_r17 6*REGWIDTH

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#define JMP_r18 7*REGWIDTH

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#define JMP_r19 8*REGWIDTH

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#define JMP_r20 9*REGWIDTH

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#define JMP_r21 10*REGWIDTH

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#define JMP_r22 11*REGWIDTH

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#define JMP_r23 12*REGWIDTH

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#define JMP_r24 13*REGWIDTH

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#define JMP_r25 14*REGWIDTH

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#define JMP_r26 15*REGWIDTH

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#define JMP_r27 16*REGWIDTH

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#define JMP_r28 17*REGWIDTH

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#define JMP_r29 18*REGWIDTH

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#define JMP_r30 19*REGWIDTH

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#define JMP_r31 20*REGWIDTH

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#define JMP_lr 	21*REGWIDTH

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#define JMP_cr	22*REGWIDTH

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#define JMP_ctr	23*REGWIDTH

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#define JMP_xer	24*REGWIDTH

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#ifdef __powerpc64__

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#ifdef PPC64_ELF_ABI_v2

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#define	ENTRY(name) \

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	.balign 2 ; \

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	.type name,@function; \

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	.weak name; \

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name:

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#else /* PPC64_ELF_ABI_v1 */

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#define	XGLUE(a,b) a##b

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#define	GLUE(a,b) XGLUE(a,b)

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#define	ENTRY(name) \

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	.balign 2 ; \

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	.weak name; \

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	.weak GLUE(.,name); \

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	.pushsection ".opd","aw"; \

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name: \

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	.quad GLUE(.,name); \

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	.quad .TOC.@tocbase; \

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	.quad 0; \

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	.popsection; \

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	.type GLUE(.,name),@function; \

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GLUE(.,name):

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#endif /* PPC64_ELF_ABI_v2 */

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#else /* 32-bit */

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#define	ENTRY(name) \

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	.text; \

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	.p2align 4; \

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	.weak name; \

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	.type name,@function; \

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name:

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#endif /* __powerpc64__ */

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ENTRY(setjmp)

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	ST_REG 31, JMP_r31(3)

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	/* r1, r2, r14-r30 */

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	ST_REG 1,  JMP_r1 (3)

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	ST_REG 2,  JMP_r2 (3)

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	ST_REG 14, JMP_r14(3)

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	ST_REG 15, JMP_r15(3)

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	ST_REG 16, JMP_r16(3)

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	ST_REG 17, JMP_r17(3)

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	ST_REG 18, JMP_r18(3)

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	ST_REG 19, JMP_r19(3)

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	ST_REG 20, JMP_r20(3)

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	ST_REG 21, JMP_r21(3)

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	ST_REG 22, JMP_r22(3)

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	ST_REG 23, JMP_r23(3)

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	ST_REG 24, JMP_r24(3)

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	ST_REG 25, JMP_r25(3)

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	ST_REG 26, JMP_r26(3)

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	ST_REG 27, JMP_r27(3)

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	ST_REG 28, JMP_r28(3)

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	ST_REG 29, JMP_r29(3)

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	ST_REG 30, JMP_r30(3)

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	/* cr, lr, ctr, xer */

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	mfcr 0

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	ST_REG 0, JMP_cr(3)

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	mflr 0

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	ST_REG 0, JMP_lr(3)

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	mfctr 0

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	ST_REG 0, JMP_ctr(3)

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	mfxer 0

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	ST_REG 0, JMP_xer(3)

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	/* f14-f31, fpscr */

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	li 3, 0

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	blr

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ENTRY(longjmp)

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	LD_REG 31, JMP_r31(3)

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	/* r1, r2, r14-r30 */

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	LD_REG 1,  JMP_r1 (3)

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	LD_REG 2,  JMP_r2 (3)

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	LD_REG 14, JMP_r14(3)

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	LD_REG 15, JMP_r15(3)

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	LD_REG 16, JMP_r16(3)

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	LD_REG 17, JMP_r17(3)

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	LD_REG 18, JMP_r18(3)

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	LD_REG 19, JMP_r19(3)

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	LD_REG 20, JMP_r20(3)

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	LD_REG 21, JMP_r21(3)

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	LD_REG 22, JMP_r22(3)

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	LD_REG 23, JMP_r23(3)

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	LD_REG 24, JMP_r24(3)

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	LD_REG 25, JMP_r25(3)

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	LD_REG 26, JMP_r26(3)

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	LD_REG 27, JMP_r27(3)

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	LD_REG 28, JMP_r28(3)

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	LD_REG 29, JMP_r29(3)

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	LD_REG 30, JMP_r30(3)

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	/* cr, lr, ctr, xer */

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	LD_REG 0, JMP_cr(3)

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	mtcr 0

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	LD_REG 0, JMP_lr(3)

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	mtlr 0

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	LD_REG 0, JMP_ctr(3)

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	mtctr 0

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	LD_REG 0, JMP_xer(3)

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	mtxer 0

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	/* f14-f31, fpscr */

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	mr 3, 4

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	blr

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#ifdef __ELF__

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.section .note.GNU-stack,"",%progbits

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#endif

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