2.5-18.1

1 files changed, 214 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/sh/sh4/swapcontext.S b/sysdeps/unix/sysv/linux/sh/sh4/swapcontext.S
new file mode 100644
index 0000000000..1aeca1b1a7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sh/sh4/swapcontext.S
@@ -0,0 +1,214 @@
+/* Save current context and install the given one.
+   Copyright (C) 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <sysdep.h>
+
+#include "ucontext_i.h"
+
+/*  int __swapcontext (ucontext_t *ouc, const ucontext_t *uc);  */
+
+	.text
+	.align  5
+ENTRY(__swapcontext)
+
+	/* Return value of getcontext.  R0 is the only register whose
+	   value is not preserved.  */
+	mov	#0, r0
+	mov.l	r0, @(oR0,r4)
+	mov.l	r1, @(oR1,r4)
+	mov.l	r2, @(oR2,r4)
+	mov.l	r3, @(oR3,r4)
+	mov.l	r4, @(oR4,r4)
+	mov.l	r5, @(oR5,r4)
+	mov.l	r6, @(oR6,r4)
+	mov.l	r7, @(oR7,r4)
+	mov	r4, r0
+	add	#(oMACL+4), r0
+	sts.l	macl, @-r0
+	sts.l	mach, @-r0
+	stc.l	gbr, @-r0
+
+	/* Save T flag to SR.  */
+	movt	r1
+	mov.l	r1, @-r0
+	sts.l	pr, @-r0
+
+	/* The return address of getcontext is the restart pc.  */
+	sts.l	pr, @-r0
+
+	mov.l	r15, @-r0
+	mov.l	r14, @-r0
+	mov.l	r13, @-r0
+	mov.l	r12, @-r0
+	mov.l	r11, @-r0
+	mov.l	r10, @-r0
+	mov.l	r9, @-r0
+	mov.l	r8, @-r0
+
+	mov	r4, r0
+	/* We need 2 add instruction because oFPUL+4 >= 127.  */
+	add	#124,r0
+	add	#(oFPUL+4-124),r0
+	sts.l	fpul, @-r0
+	sts.l	fpscr, @-r0
+	frchg
+	fmov.s	fr15, @-r0
+	fmov.s	fr14, @-r0
+	fmov.s	fr13, @-r0
+	fmov.s	fr12, @-r0
+	fmov.s	fr11, @-r0
+	fmov.s	fr10, @-r0
+	fmov.s	fr9, @-r0
+	fmov.s	fr8, @-r0
+	fmov.s	fr7, @-r0
+	fmov.s	fr6, @-r0
+	fmov.s	fr5, @-r0
+	fmov.s	fr4, @-r0
+	fmov.s	fr3, @-r0
+	fmov.s	fr2, @-r0
+	fmov.s	fr1, @-r0
+	fmov.s	fr0, @-r0
+	frchg
+	fmov.s	fr15, @-r0
+	fmov.s	fr14, @-r0
+	fmov.s	fr13, @-r0
+	fmov.s	fr12, @-r0
+	fmov.s	fr11, @-r0
+	fmov.s	fr10, @-r0
+	fmov.s	fr9, @-r0
+	fmov.s	fr8, @-r0
+	fmov.s	fr7, @-r0
+	fmov.s	fr6, @-r0
+	fmov.s	fr5, @-r0
+	fmov.s	fr4, @-r0
+	fmov.s	fr3, @-r0
+	fmov.s	fr2, @-r0
+	fmov.s	fr1, @-r0
+	fmov.s	fr0, @-r0
+
+	mov	r5, r8
+
+	/* sigprocmask (SIG_SETMASK, &uc->uc_sigmask, &ouc->uc_sigmask).  */
+	mov	#oSIGMASK, r1
+	extu.b	r1, r1
+	add	r1, r5
+	mov	r4, r6
+	add	r1, r6
+	mov	#SIG_SETMASK, r4
+	mov	#+SYS_ify(sigprocmask), r3
+	trapa	#0x13
+	mov     r0, r1
+	mov	#-12, r2
+	shad	r2, r1
+	not	r1, r1			// r1=0 means r0 = -1 to -4095
+	tst	r1, r1			// i.e. error in linux
+	bf	.Lswapcontext_restore
+.Lsyscall_error:	
+	SYSCALL_ERROR_HANDLER
+.Lpseudo_end:
+	rts
+	 nop
+.Lswapcontext_restore:	
+	mov	r8, r0
+	add	#(oFR0),r0
+	fmov.s	@r0+, fr0
+	fmov.s	@r0+, fr1
+	fmov.s	@r0+, fr2
+	fmov.s	@r0+, fr3
+	fmov.s	@r0+, fr4
+	fmov.s	@r0+, fr5
+	fmov.s	@r0+, fr6
+	fmov.s	@r0+, fr7
+	fmov.s	@r0+, fr8
+	fmov.s	@r0+, fr9
+	fmov.s	@r0+, fr10
+	fmov.s	@r0+, fr11
+	fmov.s	@r0+, fr12
+	fmov.s	@r0+, fr13
+	fmov.s	@r0+, fr14
+	fmov.s	@r0+, fr15
+	frchg
+	fmov.s	@r0+, fr0
+	fmov.s	@r0+, fr1
+	fmov.s	@r0+, fr2
+	fmov.s	@r0+, fr3
+	fmov.s	@r0+, fr4
+	fmov.s	@r0+, fr5
+	fmov.s	@r0+, fr6
+	fmov.s	@r0+, fr7
+	fmov.s	@r0+, fr8
+	fmov.s	@r0+, fr9
+	fmov.s	@r0+, fr10
+	fmov.s	@r0+, fr11
+	fmov.s	@r0+, fr12
+	fmov.s	@r0+, fr13
+	fmov.s	@r0+, fr14
+	fmov.s	@r0+, fr15
+	frchg
+	lds.l	@r0+, fpscr
+	lds.l	@r0+, fpul
+
+	mov	r8, r0
+	add	#(oPC), r0
+	mov.l	@r0+, r2
+	lds.l	@r0+, pr
+
+	/* Restore T frag.  */
+	mov.l	@r0+, r1
+	shlr	r1
+	/* Skip GBR which is used for thread pointer.  */
+	add	#4, r0
+
+	lds.l	@r0+, mach
+	lds.l	@r0+, macl
+
+	mov	r8, r0
+	add	#(oR9), r0
+	mov.l	@r0+, r9
+	mov.l	@r0+, r10
+	mov.l	@r0+, r11
+	mov.l	@r0+, r12
+	mov.l	@r0+, r13
+	mov.l	@r0+, r14
+	mov.l	@r0+, r15
+
+	mov	r8, r0
+	mov.l	@(oR0,r0), r1
+	mov.l	r1, @-r15
+	cfi_adjust_cfa_offset(4)
+	cfi_rel_offset (r1, 0)
+	mov.l	r2, @-r15
+	cfi_adjust_cfa_offset(4)
+	cfi_rel_offset (r2, 0)
+
+	mov.l	@(oR1,r0), r1
+	mov.l	@(oR2,r0), r2
+	mov.l	@(oR3,r0), r3
+	mov.l	@(oR4,r0), r4
+	mov.l	@(oR5,r0), r5
+	mov.l	@(oR6,r0), r6
+	mov.l	@(oR7,r0), r7
+	mov.l	@(oR8,r0), r8
+	mov.l	@r15+, r0
+	jmp	@r0
+	 mov.l	@r15+, r0
+	
+PSEUDO_END(__swapcontext)
+
+weak_alias (__swapcontext, swapcontext)