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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
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Original file line number | Original file line | Diff line number | Diff line change |
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/*- | |||
* SPDX-License-Identifier: BSD-1-Clause | |||
* | |||
* Copyright 2019 Justin Hibbits | |||
* | |||
* Redistribution and use in source and binary forms, with or without | |||
* modification, are permitted provided that the following conditions | |||
* are met: | |||
* 1. Redistributions of source code must retain the above copyright | |||
* notice, this list of conditions and the following disclaimer. | |||
* | |||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |||
*/ | |||
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#include <machine/asm.h> | |||
__FBSDID("$FreeBSD$"); | |||
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.text | |||
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/* | |||
* The PowerPC ABI spec requires the following save/restore functions to be | |||
* provided: | |||
* | |||
* _savefpr_N | |||
* _restfpr_N | |||
* _restfpr_N_x | |||
* _savegpr_N | |||
* _restgpr_N | |||
* _restgpr_N_x | |||
* | |||
* With N ranging from 14 to 31, to save the nonvolatile registers. | |||
*/ | |||
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#define _CRTENTRY(name) \ | |||
.text; \ | |||
.globl name; \ | |||
.type name,@function; \ | |||
name: | |||
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#define SAVEFPR(r) _CRTENTRY(__CONCAT(_savefpr_,r)) \ | |||
stfd r,(-256 + r * 8)(11) | |||
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SAVEFPR(14) | |||
SAVEFPR(15) | |||
SAVEFPR(16) | |||
SAVEFPR(17) | |||
SAVEFPR(18) | |||
SAVEFPR(19) | |||
SAVEFPR(20) | |||
SAVEFPR(21) | |||
SAVEFPR(22) | |||
SAVEFPR(23) | |||
SAVEFPR(24) | |||
SAVEFPR(25) | |||
SAVEFPR(26) | |||
SAVEFPR(27) | |||
SAVEFPR(28) | |||
SAVEFPR(29) | |||
SAVEFPR(30) | |||
SAVEFPR(31) | |||
blr | |||
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#define RESTFPR(r) _CRTENTRY(__CONCAT(_restfpr_,r)) \ | |||
lfd r,(-256 + r * 8)(11) | |||
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RESTFPR(14) | |||
RESTFPR(15) | |||
RESTFPR(16) | |||
RESTFPR(17) | |||
RESTFPR(18) | |||
RESTFPR(19) | |||
RESTFPR(20) | |||
RESTFPR(21) | |||
RESTFPR(22) | |||
RESTFPR(23) | |||
RESTFPR(24) | |||
RESTFPR(25) | |||
RESTFPR(26) | |||
RESTFPR(27) | |||
RESTFPR(28) | |||
RESTFPR(29) | |||
RESTFPR(30) | |||
RESTFPR(31) | |||
blr | |||
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#define SAVEGPR(r) _CRTENTRY(__CONCAT(_savegpr_,r)) \ | |||
stfd r,(-128 + r*4)(11) | |||
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SAVEGPR(14) | |||
SAVEGPR(15) | |||
SAVEGPR(16) | |||
SAVEGPR(17) | |||
SAVEGPR(18) | |||
SAVEGPR(19) | |||
SAVEGPR(20) | |||
SAVEGPR(21) | |||
SAVEGPR(22) | |||
SAVEGPR(23) | |||
SAVEGPR(24) | |||
SAVEGPR(25) | |||
SAVEGPR(26) | |||
SAVEGPR(27) | |||
SAVEGPR(28) | |||
SAVEGPR(29) | |||
SAVEGPR(30) | |||
SAVEGPR(31) | |||
blr | |||
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#define RESTGPR(r) _CRTENTRY(__CONCAT(_restgpr_,r)) \ | |||
lwz r,(-128 + r*4)(11) | |||
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RESTGPR(14) | |||
RESTGPR(15) | |||
RESTGPR(16) | |||
RESTGPR(17) | |||
RESTGPR(18) | |||
RESTGPR(19) | |||
RESTGPR(20) | |||
RESTGPR(21) | |||
RESTGPR(22) | |||
RESTGPR(23) | |||
RESTGPR(24) | |||
RESTGPR(25) | |||
RESTGPR(26) | |||
RESTGPR(27) | |||
RESTGPR(28) | |||
RESTGPR(29) | |||
RESTGPR(30) | |||
RESTGPR(31) | |||
blr | |||
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#define RESTFPR_X(r) _CRTENTRY(__CONCAT(__CONCAT(_restfpr_,r),_x)) \ | |||
lfd r,(-256 + r * 8)(11) | |||
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RESTFPR_X(14) | |||
RESTFPR_X(15) | |||
RESTFPR_X(16) | |||
RESTFPR_X(17) | |||
RESTFPR_X(18) | |||
RESTFPR_X(19) | |||
RESTFPR_X(20) | |||
RESTFPR_X(21) | |||
RESTFPR_X(22) | |||
RESTFPR_X(23) | |||
RESTFPR_X(24) | |||
RESTFPR_X(25) | |||
RESTFPR_X(26) | |||
RESTFPR_X(27) | |||
RESTFPR_X(28) | |||
RESTFPR_X(29) | |||
RESTFPR_X(30) | |||
RESTFPR_X(31) | |||
lwz 0,4(11) | |||
mtlr 0 | |||
mr 1,11 | |||
blr | |||
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#define RESTGPR_X(r) _CRTENTRY(__CONCAT(__CONCAT(_restgpr_,r),_x)) \ | |||
lwz r,(-128 + r*4)(11) | |||
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RESTGPR_X(14) | |||
RESTGPR_X(15) | |||
RESTGPR_X(16) | |||
RESTGPR_X(17) | |||
RESTGPR_X(18) | |||
RESTGPR_X(19) | |||
RESTGPR_X(20) | |||
RESTGPR_X(21) | |||
RESTGPR_X(22) | |||
RESTGPR_X(23) | |||
RESTGPR_X(24) | |||
RESTGPR_X(25) | |||
RESTGPR_X(26) | |||
RESTGPR_X(27) | |||
RESTGPR_X(28) | |||
RESTGPR_X(29) | |||
RESTGPR_X(30) | |||
RESTGPR_X(31) | |||
lwz 0,4(11) | |||
mtlr 0 | |||
mr 1,11 | |||
blr |
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