Relocate hppa from ports to libc.

1 files changed, 287 insertions, 0 deletions

diff --git a/sysdeps/hppa/dl-trampoline.S b/sysdeps/hppa/dl-trampoline.S
new file mode 100644
index 0000000..969e35f
--- /dev/null
+++ b/sysdeps/hppa/dl-trampoline.S
@@ -0,0 +1,287 @@
+/* PLT trampolines. hppa version.
+   Copyright (C) 2005-2014 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+/* This code gets called via the .plt stub, and is used in
+   dl-runtime.c to call the `_dl_fixup' function and then redirect
+   to the address it returns. `_dl_fixup' takes two arguments, however
+   `_dl_profile_fixup' takes a number of parameters for use with
+   library auditing (LA).
+
+   WARNING: This template is also used by gcc's __cffc, and expects
+   that the "bl" for _dl_runtime_resolve exist at a particular offset.
+   Do not change this template without changing gcc, while the prefix
+   "bl" should fix everything so gcc finds the right spot, it will
+   slow down __cffc when it attempts to call fixup to resolve function
+   descriptor references. Please refer to gcc/gcc/config/pa/fptr.c
+
+   Enter with r19 = reloc offset, r20 = got-8, r21 = fixup ltp.  */
+
+	/* RELOCATION MARKER: bl to provide gcc's __cffc with fixup loc. */
+	.text
+	/* THIS CODE DOES NOT EXECUTE */
+	bl	_dl_fixup, %r2
+        .text
+        .global _dl_runtime_resolve
+        .type _dl_runtime_resolve,@function
+	cfi_startproc
+        .align 4
+_dl_runtime_resolve:
+        .PROC
+        .CALLINFO FRAME=128,CALLS,SAVE_RP,ENTRY_GR=3
+        .ENTRY
+        /* SAVE_RP says we do */
+        stw	%rp, -20(%sp)
+
+	/* Save static link register */
+	stw	%r29,-16(%sp)
+	/* Save argument registers */
+	stw	%r26,-36(%sp)
+	stw	%r25,-40(%sp)
+	stw	%r24,-44(%sp)
+	stw	%r23,-48(%sp)
+
+	/* Build a call frame, and save structure pointer. */
+	copy	%sp, %r1	/* Copy previous sp */
+	/* Save function result address (on entry) */
+	stwm	%r28,128(%sp)
+	/* Fillin some frame info to follow ABI */
+	stw	%r1,-4(%sp)	/* Previous sp */
+	stw	%r21,-32(%sp)	/* PIC register value */
+
+	/* Save input floating point registers. This must be done
+	   in the new frame since the previous frame doesn't have
+	   enough space */
+	ldo	-56(%sp),%r1
+	fstd,ma	%fr4,-8(%r1)
+	fstd,ma	%fr5,-8(%r1)
+	fstd,ma	%fr6,-8(%r1)
+	fstd,ma	%fr7,-8(%r1)
+
+	/* Set up args to fixup func, needs only two arguments  */
+	ldw	8+4(%r20),%r26		/* (1) got[1] == struct link_map */
+	copy	%r19,%r25		/* (2) reloc offset  */
+
+	/* Call the real address resolver. */
+	bl	_dl_fixup,%rp
+	copy	%r21,%r19		/* set fixup func ltp */
+
+	/* Load up the returned func descriptor */
+	copy	%r28, %r22
+	copy	%r29, %r19
+
+	/* Reload arguments fp args */
+	ldo	-56(%sp),%r1
+	fldd,ma	-8(%r1),%fr4
+	fldd,ma	-8(%r1),%fr5
+	fldd,ma	-8(%r1),%fr6
+	fldd,ma	-8(%r1),%fr7
+
+	/* Adjust sp, and restore function result address*/
+	ldwm	-128(%sp),%r28
+
+	/* Reload static link register */
+	ldw	-16(%sp),%r29
+	/* Reload general args */
+	ldw	-36(%sp),%r26
+	ldw	-40(%sp),%r25
+	ldw	-44(%sp),%r24
+	ldw	-48(%sp),%r23
+
+	/* Jump to new function, but return to previous function */
+	bv	%r0(%r22)
+	ldw	-20(%sp),%rp
+        .EXIT
+        .PROCEND
+	cfi_endproc
+	.size   _dl_runtime_resolve, . - _dl_runtime_resolve
+
+        .text
+        .global _dl_runtime_profile
+        .type _dl_runtime_profile,@function
+	cfi_startproc
+        .align 4
+_dl_runtime_profile:
+        .PROC
+        .CALLINFO FRAME=192,CALLS,SAVE_RP,ENTRY_GR=3
+        .ENTRY
+
+        /* SAVE_RP says we do */
+        stw	%rp, -20(%sp)
+	/* Save static link register */
+	stw	%r29,-16(%sp)
+
+	/* Build a call frame, and save structure pointer. */
+	copy	%sp, %r1	/* Copy previous sp */
+	/* Save function result address (on entry) */
+	stwm	%r28,192(%sp)
+	/* Fillin some frame info to follow ABI */
+	stw	%r1,-4(%sp)	/* Previous sp */
+	stw	%r21,-32(%sp)	/* PIC register value */
+
+	/* Create La_hppa_retval */
+	/* -140, lrv_r28
+           -136, lrv_r29
+           -132, 4 byte pad
+           -128, lr_fr4 (8 bytes) */
+
+	/* Create save space for _dl_profile_fixup arguments
+	   -120, Saved reloc offset
+	   -116, Saved struct link_map
+	   -112, *framesizep */
+
+	/* Create La_hppa_regs */
+	/* 32-bit registers */
+	stw	%r26,-108(%sp)
+	stw	%r25,-104(%sp)
+	stw	%r24,-100(%sp)
+	stw	%r23,-96(%sp)
+	/* -92, 4 byte pad */
+	/* 64-bit floating point registers */
+	ldo	-88(%sp),%r1
+	fstd,ma	%fr4,8(%r1)
+	fstd,ma	%fr5,8(%r1)
+	fstd,ma	%fr6,8(%r1)
+	fstd,ma	%fr7,8(%r1)
+	/* 32-bit stack pointer and return register */
+	stw	%sp,-56(%sp)
+	stw	%r2,-52(%sp)
+
+
+	/* Set up args to fixup func, needs five arguments  */
+	ldw	8+4(%r20),%r26		/* (1) got[1] == struct link_map */
+	stw	%r26,-116(%sp)		/* Save struct link_map */
+	copy	%r19,%r25		/* (2) reloc offset  */
+	stw	%r25,-120(%sp)		/* Save reloc offset */
+	copy    %rp,%r24		/* (3) profile_fixup needs rp */
+	ldo	-56(%sp),%r23		/* (4) La_hppa_regs */
+	ldo	-112(%sp), %r1
+	stw	%r1, -52(%sp)		/* (5) long int *framesizep */
+
+	/* Call the real address resolver. */
+	bl	_dl_profile_fixup,%rp
+	copy	%r21,%r19		/* set fixup func ltp */
+
+	/* Load up the returned function descriptor */
+	copy	%r28, %r22
+	copy	%r29, %r19
+
+	/* Restore gr/fr/sp/rp */
+	ldw	-108(%sp),%r26
+	ldw	-104(%sp),%r25
+	ldw	-100(%sp),%r24
+	ldw	-96(%sp),%r23
+	/* -92, 4 byte pad, skip */
+	ldo	-88(%sp),%r1
+	fldd,ma	8(%r1),%fr4
+	fldd,ma	8(%r1),%fr5
+	fldd,ma	8(%r1),%fr6
+	fldd,ma	8(%r1),%fr7
+	ldw	-52(%sp),%rp
+
+	/* Reload static link register -(192+16) without adjusting stack */
+	ldw	-208(%sp),%r29
+
+	/* *framesizep is >= 0 if we have to run pltexit */
+	ldw	-112(%sp),%r28
+	cmpb,>>=,N %r0,%r28,L(cpe)
+
+	/* Adjust sp, and restore function result address*/
+	ldwm	-192(%sp),%r28
+	/* Jump to new function, but return to previous function */
+	bv	%r0(%r22)
+	ldw	-20(%sp),%rp
+	/* NO RETURN */
+
+L(nf):
+	/* Call the returned function descriptor */
+	bv	%r0(%r22)
+	nop
+	b,n	L(cont)
+
+L(cpe):
+	/* We are going to call the resolved function, but we have a
+	   stack frame in the middle. We use the value of framesize to
+	   guess how much extra frame we need, and how much frame to
+	   copy forward. */
+
+	/* Round to nearest multiple of 64 */
+	addi	63, %r28, %r28
+	depi	0, 27, 6, %r28
+
+	/* Calcualte start of stack copy */
+	ldo	-192(%sp),%r2
+
+	/* Increate the stack by *framesizep */
+	copy	%sp, %r1
+	add	%sp, %r28, %sp
+	/* Save stack pointer */
+	stw	%r1, -4(%sp)
+
+	/* Single byte copy of prevous stack onto newly allocated stack */
+1:	ldb	%r28(%r2), %r1
+	add	%r28, %sp, %r26
+	stb	%r1, 0(%r26)
+	addi,<	-1,%r28,%r28
+	b,n	1b
+
+	/* Retore r28 and r27 and r2 already points at -192(%sp) */
+	ldw	0(%r2),%r28
+	ldw	84(%r2),%r26
+
+	/* Calculate address of L(cont) */
+	b,l	L(nf),%r2
+	depwi 0,31,2,%r2
+L(cont):
+	/* Undo fake stack */
+	ldw	-4(%sp),%r1
+	copy	%r1, %sp
+
+	/* Arguments to _dl_call_pltexit */
+	ldw	-116(%sp), %r26		/* (1) got[1] == struct link_map */
+	ldw	-120(%sp), %r25		/* (2) reloc offsets */
+	ldo	-56(%sp), %r24		/* (3) *La_hppa_regs */
+	ldo	-124(%sp), %r23		/* (4) *La_hppa_retval */
+
+	/* Fill *La_hppa_retval */
+	stw	%r28,-140(%sp)
+	stw	%r29,-136(%sp)
+	ldo	-128(%sp), %r1
+	fstd	%fr4,0(%r1)
+
+	/* Call _dl_call_pltexit */
+	bl	_dl_call_pltexit,%rp
+	nop
+
+	/* Restore *La_hppa_retval */
+	ldw	-140(%sp), %r28
+	ldw	-136(%sp), %r29
+	ldo	-128(%sp), %r1
+	fldd	0(%r1), %fr4
+
+	/* Unwind the stack */
+	ldo	192(%sp),%sp
+	/* Retore callers rp */
+        ldw -20(%sp),%rp
+	/* Return */
+	bv,n	0(%r2)
+        .EXIT
+        .PROCEND
+	cfi_endproc
+	.size   _dl_runtime_profile, . - _dl_runtime_profile