2.5-18.1

1 files changed, 128 insertions, 0 deletions

diff --git a/sysdeps/s390/s390-64/dl-trampoline.S b/sysdeps/s390/s390-64/dl-trampoline.S
new file mode 100644
index 0000000000..8093582163
--- /dev/null
+++ b/sysdeps/s390/s390-64/dl-trampoline.S
@@ -0,0 +1,128 @@
+/* PLT trampolines.  s390 version.
+   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.  */
+
+/* The PLT stubs will call _dl_runtime_resolve/_dl_runtime_profile
+ * with the following linkage:
+ *   r2 - r6 : parameter registers
+ *   f0, f2, f4, f6 : floating point parameter registers
+ *   24(r15), 28(r15) : PLT arguments PLT1, PLT2
+ *   96(r15) : additional stack parameters
+ * The normal clobber rules for function calls apply:
+ *   r0 - r5 : call clobbered
+ *   r6 - r13 :	 call saved
+ *   r14 : return address (call clobbered)
+ *   r15 : stack pointer (call saved)
+ *   f1, f3, f5, f7 : call saved
+ *   f0 - f3, f5, f7 - f15 : call clobbered
+ */
+
+#include <sysdep.h>
+
+	.text
+	.globl _dl_runtime_resolve
+	.type _dl_runtime_resolve, @function
+	cfi_startproc
+	.align 16
+_dl_runtime_resolve:
+	stmg   2,5,64(15)	# save registers
+	stg    14,96(15)
+	lgr    0,15		# create stack frame
+	aghi   15,-160
+	cfi_adjust_cfa_offset (160)
+	stg    0,0(15)
+	lmg    2,3,208(15)	# load args saved by PLT
+	brasl  14,_dl_fixup	# call fixup
+	lgr    1,2		# function addr returned in r2
+	aghi   15,160		# remove stack frame
+	cfi_adjust_cfa_offset (-160)
+	lg     14,96(15)	# restore registers
+	lmg    2,5,64(15)
+	br     1
+	cfi_endproc
+	.size _dl_runtime_resolve, .-_dl_runtime_resolve
+
+
+#ifndef PROF
+	.globl _dl_runtime_profile
+	.type _dl_runtime_profile, @function
+	cfi_startproc
+	.align 16
+_dl_runtime_profile:
+	stmg   %r2,%r6,64(%r15)		# save registers
+	std    %f0,104(%r15)
+	std    %f2,112(%r15)
+	std    %f4,120(%r15)
+	std    %f6,128(%r15)
+	stg    %r6,16(%r15)
+	stg    %r12,24(%r15)
+	stg    %r14,32(%r15)
+	lgr    %r12,%r15		# create stack frame
+	cfi_def_cfa_register (12)
+	aghi   %r15,-160
+	stg    %r12,0(%r15)
+	lmg    %r2,%r3,48(%r12)		# load arguments saved by PLT
+	lgr    %r4,%r14			# return address as third parameter
+	la     %r5,64(%r12)		# pointer to struct La_s390_32_regs
+	la     %r6,40(%r12)		# long int * framesize
+	brasl  %r14,_dl_profile_fixup	# call resolver
+	lgr    %r1,%r2			# function addr returned in r2
+	lg     %r0,40(%r12)		# load framesize
+	ltgr   %r0,%r0
+	jnm    1f
+	lmg    %r2,%r6,64(%r12)
+	ld     %f0,104(%r12)
+	ld     %f2,112(%r12)
+	ld     %f4,120(%r12)
+	ld     %f6,128(%r12)
+	basr   %r14,%r1			# call resolved function
+0:	lr     %r15,%r12		# remove stack frame
+	cfi_def_cfa_register (15)
+	lg     %r14,32(%r15)		# restore registers
+	lg     %r12,24(%r15)
+	lg     %r6,16(%r15)
+	br     %r14
+	cfi_def_cfa_register (12)
+1:	jz     4f			# framesize == 0 ?
+	aghi   %r0,7			# align framesize to 8
+	nill   %r0,0xfff8
+	slgr   %r15,%r0			# make room for framesize bytes
+	stg    %r12,0(%r15)
+	la     %r2,160(%r15)
+	la     %r3,160(%r12)
+	srlg   %r0,%r0,3
+3:	mvc    0(8,%r2),0(%r3)		# copy additional parameters
+	la     %r2,8(%r2)
+	la     %r3,8(%r3)
+	brctg  %r0,3b
+4:	lmg    %r2,%r6,64(%r12)		# load register parameters
+	ld     %f0,104(%r12)
+	ld     %f2,112(%r12)
+	ld     %f4,120(%r12)
+	ld     %f6,128(%r12)
+	basr   %r14,%r1			# call resolved function
+	stg    %r2,136(%r12)
+	std    %f0,144(%r12)
+	lmg    %r2,%r3,48(%r12)		# load arguments saved by PLT
+	la     %r4,32(%r12)		# pointer to struct La_s390_32_regs
+	la     %r5,72(%r12)		# pointer to struct La_s390_32_retval
+	brasl  %r14,_dl_call_pltexit
+	j      0b
+	cfi_endproc
+	.size _dl_runtime_profile, .-_dl_runtime_profile
+#endif