Create crtsavres.o for powerpc builds
Summary: GCC expects to link in a crtsavres.o on powerpc platforms. On powerpc64 this is an empty file, but on powerpc and powerpcspe this does contain some save/restore functions, which may not actually be necessary for newer modern GCC and clang. This appeases the in-tree gcc, though, and is needed in order to switch to the BSD CRTRBEGIN. PR: 233751 Reviewed By: andrew Differential Revision: https://reviews.freebsd.org/D18826
This commit is contained in:
Justin Hibbits
parent
be860eae0f
commit
5d031e332f
@ -28,10 +28,6 @@ CRTS_CFLAGS= -DCRTSTUFFS_O -DSHARED ${PICFLAG}
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CFLAGS+= -DTARGET_ARM_EABI
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.endif
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.if ${MACHINE_CPUARCH} == "powerpc"
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TGTOBJS= crtsavres.o
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SRCS+= crtsavres.asm
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.endif
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.if ${MACHINE_CPUARCH} == "sparc64"
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TGTOBJS= crtfastmath.o
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SRCS+= crtfastmath.c
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@ -2,7 +2,7 @@
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.PATH: ${.CURDIR:H}/common
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SRCS= crt1.c crti.S crtn.S
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SRCS= crt1.c crti.S crtn.S crtsavres.S
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OBJS= ${SRCS:N*.h:R:S/$/.o/g}
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OBJS+= Scrt1.o gcrt1.o
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CFLAGS+= -I${.CURDIR:H}/common \
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191
lib/csu/powerpc/crtsavres.S
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191
lib/csu/powerpc/crtsavres.S
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@ -0,0 +1,191 @@
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/*-
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* SPDX-License-Identifier: BSD-1-Clause
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*
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* Copyright 2019 Justin Hibbits
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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.text
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/*
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* The PowerPC ABI spec requires the following save/restore functions to be
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* provided:
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*
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* _savefpr_N
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* _restfpr_N
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* _restfpr_N_x
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* _savegpr_N
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* _restgpr_N
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* _restgpr_N_x
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*
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* With N ranging from 14 to 31, to save the nonvolatile registers.
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*/
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#define _CRTENTRY(name) \
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.text; \
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.globl name; \
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.type name,@function; \
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name:
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#define SAVEFPR(r) _CRTENTRY(__CONCAT(_savefpr_,r)) \
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stfd r,(-256 + r * 8)(11)
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SAVEFPR(14)
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SAVEFPR(15)
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SAVEFPR(16)
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SAVEFPR(17)
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SAVEFPR(18)
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SAVEFPR(19)
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SAVEFPR(20)
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SAVEFPR(21)
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SAVEFPR(22)
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SAVEFPR(23)
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SAVEFPR(24)
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SAVEFPR(25)
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SAVEFPR(26)
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SAVEFPR(27)
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SAVEFPR(28)
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SAVEFPR(29)
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SAVEFPR(30)
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SAVEFPR(31)
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blr
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#define RESTFPR(r) _CRTENTRY(__CONCAT(_restfpr_,r)) \
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lfd r,(-256 + r * 8)(11)
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RESTFPR(14)
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RESTFPR(15)
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RESTFPR(16)
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RESTFPR(17)
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RESTFPR(18)
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RESTFPR(19)
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RESTFPR(20)
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RESTFPR(21)
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RESTFPR(22)
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RESTFPR(23)
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RESTFPR(24)
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RESTFPR(25)
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RESTFPR(26)
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RESTFPR(27)
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RESTFPR(28)
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RESTFPR(29)
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RESTFPR(30)
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RESTFPR(31)
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blr
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#define SAVEGPR(r) _CRTENTRY(__CONCAT(_savegpr_,r)) \
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stfd r,(-128 + r*4)(11)
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SAVEGPR(14)
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SAVEGPR(15)
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SAVEGPR(16)
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SAVEGPR(17)
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SAVEGPR(18)
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SAVEGPR(19)
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SAVEGPR(20)
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SAVEGPR(21)
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SAVEGPR(22)
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SAVEGPR(23)
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SAVEGPR(24)
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SAVEGPR(25)
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SAVEGPR(26)
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SAVEGPR(27)
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SAVEGPR(28)
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SAVEGPR(29)
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SAVEGPR(30)
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SAVEGPR(31)
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blr
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#define RESTGPR(r) _CRTENTRY(__CONCAT(_restgpr_,r)) \
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lwz r,(-128 + r*4)(11)
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RESTGPR(14)
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RESTGPR(15)
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RESTGPR(16)
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RESTGPR(17)
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RESTGPR(18)
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RESTGPR(19)
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RESTGPR(20)
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RESTGPR(21)
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RESTGPR(22)
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RESTGPR(23)
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RESTGPR(24)
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RESTGPR(25)
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RESTGPR(26)
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RESTGPR(27)
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RESTGPR(28)
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RESTGPR(29)
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RESTGPR(30)
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RESTGPR(31)
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blr
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#define RESTFPR_X(r) _CRTENTRY(__CONCAT(__CONCAT(_restfpr_,r),_x)) \
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lfd r,(-256 + r * 8)(11)
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RESTFPR_X(14)
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RESTFPR_X(15)
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RESTFPR_X(16)
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RESTFPR_X(17)
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RESTFPR_X(18)
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RESTFPR_X(19)
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RESTFPR_X(20)
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RESTFPR_X(21)
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RESTFPR_X(22)
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RESTFPR_X(23)
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RESTFPR_X(24)
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RESTFPR_X(25)
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RESTFPR_X(26)
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RESTFPR_X(27)
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RESTFPR_X(28)
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RESTFPR_X(29)
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RESTFPR_X(30)
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RESTFPR_X(31)
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lwz 0,4(11)
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mtlr 0
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mr 1,11
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blr
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#define RESTGPR_X(r) _CRTENTRY(__CONCAT(__CONCAT(_restgpr_,r),_x)) \
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lwz r,(-128 + r*4)(11)
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RESTGPR_X(14)
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RESTGPR_X(15)
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RESTGPR_X(16)
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RESTGPR_X(17)
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RESTGPR_X(18)
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RESTGPR_X(19)
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RESTGPR_X(20)
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RESTGPR_X(21)
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RESTGPR_X(22)
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RESTGPR_X(23)
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RESTGPR_X(24)
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RESTGPR_X(25)
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RESTGPR_X(26)
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RESTGPR_X(27)
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RESTGPR_X(28)
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RESTGPR_X(29)
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RESTGPR_X(30)
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RESTGPR_X(31)
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lwz 0,4(11)
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mtlr 0
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mr 1,11
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blr
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@ -4,7 +4,7 @@
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SRCS= crt1.c crti.S crtn.S
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OBJS= ${SRCS:N*.h:R:S/$/.o/g}
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OBJS+= Scrt1.o gcrt1.o
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OBJS+= crtsavres.o Scrt1.o gcrt1.o
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CFLAGS+= -I${.CURDIR:H}/common \
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-I${SRCTOP}/lib/libc/include \
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-mlongcall -DCRT_IRELOC_SUPPRESS
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@ -18,7 +18,7 @@ FILESDIR= ${LIBDIR}
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.undef LIBRARIES_ONLY
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CLEANFILES= ${OBJS}
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CLEANFILES+= crt1.s gcrt1.s Scrt1.s
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CLEANFILES+= crt1.s crtsavres.s gcrt1.s Scrt1.s
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# See the comment in lib/csu/common/crtbrand.c for the reason crt1.c is not
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# directly compiled to .o files.
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@ -27,6 +27,10 @@ crt1.s: crt1.c
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${CC} ${CFLAGS} -S -o ${.TARGET} ${.CURDIR}/crt1.c
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sed ${SED_FIX_NOTE} ${.TARGET}
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# On powerpc64 crtsavres is an empty file
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crtsavres.s:
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touch ${.TARGET}
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crt1.o: crt1.s
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${CC} ${CFLAGS:N-g} ${ACFLAGS} -c -o ${.TARGET} crt1.s
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