mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-11 07:40:05 +00:00
501 lines
11 KiB
ArmAsm
501 lines
11 KiB
ArmAsm
/* PLT trampolines. PPC64 version.
|
|
Copyright (C) 2005-2015 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>
|
|
#include <rtld-global-offsets.h>
|
|
|
|
|
|
.section ".text"
|
|
/* On entry r0 contains the index of the PLT entry we need to fixup
|
|
and r11 contains the link_map (from PLT0+16). The link_map becomes
|
|
parm1 (r3) and the index (r0) need to be converted to an offset
|
|
(index * 24) in parm2 (r4). */
|
|
|
|
#define FRAME_SIZE (FRAME_MIN_SIZE+64)
|
|
/* We need to save the registers used to pass parameters, ie. r3 thru
|
|
r10; Use local var space rather than the parameter save area,
|
|
because gcc as of 2010/05 doesn't allocate a proper stack frame for
|
|
a function that makes no calls except for __tls_get_addr and we
|
|
might be here resolving the __tls_get_addr call. */
|
|
#define INT_PARMS FRAME_MIN_SIZE
|
|
EALIGN(_dl_runtime_resolve, 4, 0)
|
|
stdu r1,-FRAME_SIZE(r1)
|
|
cfi_adjust_cfa_offset (FRAME_SIZE)
|
|
std r3,INT_PARMS+0(r1)
|
|
mr r3,r11
|
|
std r4,INT_PARMS+8(r1)
|
|
sldi r4,r0,1
|
|
std r5,INT_PARMS+16(r1)
|
|
add r4,r4,r0
|
|
std r6,INT_PARMS+24(r1)
|
|
sldi r4,r4,3
|
|
std r7,INT_PARMS+32(r1)
|
|
mflr r0
|
|
std r8,INT_PARMS+40(r1)
|
|
/* Store the LR in the LR Save area. */
|
|
std r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
|
|
cfi_offset (lr, FRAME_LR_SAVE)
|
|
std r9,INT_PARMS+48(r1)
|
|
std r10,INT_PARMS+56(r1)
|
|
bl JUMPTARGET(_dl_fixup)
|
|
#ifndef SHARED
|
|
nop
|
|
#endif
|
|
/* Put the registers back. */
|
|
ld r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
|
|
ld r10,INT_PARMS+56(r1)
|
|
ld r9,INT_PARMS+48(r1)
|
|
ld r8,INT_PARMS+40(r1)
|
|
ld r7,INT_PARMS+32(r1)
|
|
mtlr r0
|
|
ld r6,INT_PARMS+24(r1)
|
|
ld r5,INT_PARMS+16(r1)
|
|
ld r4,INT_PARMS+8(r1)
|
|
/* Prepare for calling the function returned by fixup. */
|
|
PPC64_LOAD_FUNCPTR r3
|
|
ld r3,INT_PARMS+0(r1)
|
|
#if _CALL_ELF == 2
|
|
/* Restore the caller's TOC in case we jump to a local entry point. */
|
|
ld r2,FRAME_SIZE+FRAME_TOC_SAVE(r1)
|
|
#endif
|
|
/* Unwind the stack frame, and jump. */
|
|
addi r1,r1,FRAME_SIZE
|
|
bctr
|
|
END(_dl_runtime_resolve)
|
|
#undef FRAME_SIZE
|
|
#undef INT_PARMS
|
|
|
|
/* Stack layout: ELFv2 ABI.
|
|
+752 previous backchain
|
|
+744 spill_r31
|
|
+736 spill_r30
|
|
+720 v8
|
|
+704 v7
|
|
+688 v6
|
|
+672 v5
|
|
+656 v4
|
|
+640 v3
|
|
+624 v2
|
|
+608 v1
|
|
+600 fp10
|
|
ELFv1 ABI +592 fp9
|
|
+592 previous backchain +584 fp8
|
|
+584 spill_r31 +576 fp7
|
|
+576 spill_r30 +568 fp6
|
|
+560 v1 +560 fp5
|
|
+552 fp4 +552 fp4
|
|
+544 fp3 +544 fp3
|
|
+536 fp2 +536 fp2
|
|
+528 fp1 +528 fp1
|
|
+520 r4 +520 r4
|
|
+512 r3 +512 r3
|
|
return values
|
|
+504 free
|
|
+496 stackframe
|
|
+488 lr
|
|
+480 r1
|
|
+464 v13
|
|
+448 v12
|
|
+432 v11
|
|
+416 v10
|
|
+400 v9
|
|
+384 v8
|
|
+368 v7
|
|
+352 v6
|
|
+336 v5
|
|
+320 v4
|
|
+304 v3
|
|
+288 v2
|
|
* VMX Parms in V2-V13, V0-V1 are scratch
|
|
+284 vrsave
|
|
+280 free
|
|
+272 fp13
|
|
+264 fp12
|
|
+256 fp11
|
|
+248 fp10
|
|
+240 fp9
|
|
+232 fp8
|
|
+224 fp7
|
|
+216 fp6
|
|
+208 fp5
|
|
+200 fp4
|
|
+192 fp3
|
|
+184 fp2
|
|
+176 fp1
|
|
* FP Parms in FP1-FP13, FP0 is a scratch register
|
|
+168 r10
|
|
+160 r9
|
|
+152 r8
|
|
+144 r7
|
|
+136 r6
|
|
+128 r5
|
|
+120 r4
|
|
+112 r3
|
|
* Integer parms in R3-R10, R0 is scratch, R1 SP, R2 is TOC
|
|
+104 parm8
|
|
+96 parm7
|
|
+88 parm6
|
|
+80 parm5
|
|
+72 parm4
|
|
+64 parm3
|
|
+56 parm2
|
|
+48 parm1
|
|
* Parameter save area
|
|
* (v1 ABI: Allocated by the call, at least 8 double words)
|
|
+40 v1 ABI: TOC save area
|
|
+32 v1 ABI: Reserved for linker
|
|
+24 v1 ABI: Reserved for compiler / v2 ABI: TOC save area
|
|
+16 LR save area
|
|
+8 CR save area
|
|
r1+0 stack back chain
|
|
*/
|
|
#if _CALL_ELF == 2
|
|
# define FRAME_SIZE 752
|
|
# define VR_RTN 608
|
|
#else
|
|
# define FRAME_SIZE 592
|
|
# define VR_RTN 560
|
|
#endif
|
|
#define INT_RTN 512
|
|
#define FPR_RTN 528
|
|
#define STACK_FRAME 496
|
|
#define CALLING_LR 488
|
|
#define CALLING_SP 480
|
|
#define INT_PARMS 112
|
|
#define FPR_PARMS 176
|
|
#define VR_PARMS 288
|
|
#define VR_VRSAVE 284
|
|
.section ".toc","aw"
|
|
.LC__dl_hwcap:
|
|
# ifdef SHARED
|
|
.tc _rtld_local_ro[TC],_rtld_local_ro
|
|
# else
|
|
.tc _dl_hwcap[TC],_dl_hwcap
|
|
# endif
|
|
.section ".text"
|
|
|
|
.machine "altivec"
|
|
/* On entry r0 contains the index of the PLT entry we need to fixup
|
|
and r11 contains the link_map (from PLT0+16). The link_map becomes
|
|
parm1 (r3) and the index (r0) needs to be converted to an offset
|
|
(index * 24) in parm2 (r4). */
|
|
#ifndef PROF
|
|
EALIGN(_dl_profile_resolve, 4, 0)
|
|
/* Spill r30, r31 to preserve the link_map* and reloc_addr, in case we
|
|
need to call _dl_call_pltexit. */
|
|
std r31,-8(r1)
|
|
std r30,-16(r1)
|
|
/* We need to save the registers used to pass parameters, ie. r3 thru
|
|
r10; the registers are saved in a stack frame. */
|
|
stdu r1,-FRAME_SIZE(r1)
|
|
cfi_adjust_cfa_offset (FRAME_SIZE)
|
|
cfi_offset(r31,-8)
|
|
cfi_offset(r30,-16)
|
|
std r3,INT_PARMS+0(r1)
|
|
mr r3,r11
|
|
std r4,INT_PARMS+8(r1)
|
|
sldi r4,r0,1 /* index * 2 */
|
|
std r5,INT_PARMS+16(r1)
|
|
add r4,r4,r0 /* index * 3 */
|
|
std r6,INT_PARMS+24(r1)
|
|
sldi r4,r4,3 /* index * 24 == PLT offset */
|
|
mflr r5
|
|
std r7,INT_PARMS+32(r1)
|
|
std r8,INT_PARMS+40(r1)
|
|
/* Store the LR in the LR Save area. */
|
|
la r8,FRAME_SIZE(r1)
|
|
std r5,FRAME_SIZE+FRAME_LR_SAVE(r1)
|
|
cfi_offset (lr, FRAME_LR_SAVE)
|
|
std r5,CALLING_LR(r1)
|
|
std r9,INT_PARMS+48(r1)
|
|
std r10,INT_PARMS+56(r1)
|
|
std r8,CALLING_SP(r1)
|
|
ld r12,.LC__dl_hwcap@toc(r2)
|
|
#ifdef SHARED
|
|
/* Load _rtld_local_ro._dl_hwcap. */
|
|
ld r12,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r12)
|
|
#else
|
|
ld r12,0(r12) /* Load extern _dl_hwcap. */
|
|
#endif
|
|
andis. r0,r12,(PPC_FEATURE_HAS_ALTIVEC >> 16)
|
|
beq L(saveFP)
|
|
la r10,(VR_PARMS+0)(r1)
|
|
la r9,(VR_PARMS+16)(r1)
|
|
li r11,32
|
|
li r12,64
|
|
stvx v2,0,r10
|
|
stvx v3,0,r9
|
|
|
|
stvx v4,r11,r10
|
|
stvx v5,r11,r9
|
|
addi r11,r11,64
|
|
|
|
stvx v6,r12,r10
|
|
stvx v7,r12,r9
|
|
addi r12,r12,64
|
|
|
|
stvx v8,r11,r10
|
|
stvx v9,r11,r9
|
|
addi r11,r11,64
|
|
|
|
stvx v10,r12,r10
|
|
stvx v11,r12,r9
|
|
mfspr r0,VRSAVE
|
|
|
|
stvx v12,r11,r10
|
|
stvx v13,r11,r9
|
|
L(saveFP):
|
|
stw r0,VR_VRSAVE(r1)
|
|
/* Save floating registers. */
|
|
stfd fp1,FPR_PARMS+0(r1)
|
|
stfd fp2,FPR_PARMS+8(r1)
|
|
stfd fp3,FPR_PARMS+16(r1)
|
|
stfd fp4,FPR_PARMS+24(r1)
|
|
stfd fp5,FPR_PARMS+32(r1)
|
|
stfd fp6,FPR_PARMS+40(r1)
|
|
stfd fp7,FPR_PARMS+48(r1)
|
|
stfd fp8,FPR_PARMS+56(r1)
|
|
stfd fp9,FPR_PARMS+64(r1)
|
|
stfd fp10,FPR_PARMS+72(r1)
|
|
stfd fp11,FPR_PARMS+80(r1)
|
|
li r0,-1
|
|
stfd fp12,FPR_PARMS+88(r1)
|
|
stfd fp13,FPR_PARMS+96(r1)
|
|
/* Load the extra parameters. */
|
|
addi r6,r1,INT_PARMS
|
|
addi r7,r1,STACK_FRAME
|
|
/* Save link_map* and reloc_addr parms for later. */
|
|
mr r31,r3
|
|
mr r30,r4
|
|
std r0,0(r7)
|
|
bl JUMPTARGET(_dl_profile_fixup)
|
|
#ifndef SHARED
|
|
nop
|
|
#endif
|
|
/* Test *framesizep > 0 to see if need to do pltexit processing. */
|
|
ld r0,STACK_FRAME(r1)
|
|
/* Put the registers back. */
|
|
lwz r12,VR_VRSAVE(r1)
|
|
cmpdi cr1,r0,0
|
|
cmpdi cr0,r12,0
|
|
bgt cr1,L(do_pltexit)
|
|
la r10,(VR_PARMS+0)(r1)
|
|
la r9,(VR_PARMS+16)(r1)
|
|
/* VRSAVE must be non-zero if VMX is present and VRs are in use. */
|
|
beq L(restoreFXR)
|
|
li r11,32
|
|
li r12,64
|
|
lvx v2,0,r10
|
|
lvx v3,0,r9
|
|
|
|
lvx v4,r11,r10
|
|
lvx v5,r11,r9
|
|
addi r11,r11,64
|
|
|
|
lvx v6,r12,r10
|
|
lvx v7,r12,r9
|
|
addi r12,r12,64
|
|
|
|
lvx v8,r11,r10
|
|
lvx v9,r11,r9
|
|
addi r11,r11,64
|
|
|
|
lvx v10,r12,r10
|
|
lvx v11,r12,r9
|
|
|
|
lvx v12,r11,r10
|
|
lvx v13,r11,r9
|
|
L(restoreFXR):
|
|
ld r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
|
|
ld r10,INT_PARMS+56(r1)
|
|
ld r9,INT_PARMS+48(r1)
|
|
ld r8,INT_PARMS+40(r1)
|
|
ld r7,INT_PARMS+32(r1)
|
|
mtlr r0
|
|
ld r6,INT_PARMS+24(r1)
|
|
ld r5,INT_PARMS+16(r1)
|
|
ld r4,INT_PARMS+8(r1)
|
|
/* Prepare for calling the function returned by fixup. */
|
|
PPC64_LOAD_FUNCPTR r3
|
|
ld r3,INT_PARMS+0(r1)
|
|
#if _CALL_ELF == 2
|
|
/* Restore the caller's TOC in case we jump to a local entry point. */
|
|
ld r2,FRAME_SIZE+FRAME_TOC_SAVE(r1)
|
|
#endif
|
|
/* Load the floating point registers. */
|
|
lfd fp1,FPR_PARMS+0(r1)
|
|
lfd fp2,FPR_PARMS+8(r1)
|
|
lfd fp3,FPR_PARMS+16(r1)
|
|
lfd fp4,FPR_PARMS+24(r1)
|
|
lfd fp5,FPR_PARMS+32(r1)
|
|
lfd fp6,FPR_PARMS+40(r1)
|
|
lfd fp7,FPR_PARMS+48(r1)
|
|
lfd fp8,FPR_PARMS+56(r1)
|
|
lfd fp9,FPR_PARMS+64(r1)
|
|
lfd fp10,FPR_PARMS+72(r1)
|
|
lfd fp11,FPR_PARMS+80(r1)
|
|
lfd fp12,FPR_PARMS+88(r1)
|
|
lfd fp13,FPR_PARMS+96(r1)
|
|
/* Unwind the stack frame, and jump. */
|
|
ld r31,FRAME_SIZE-8(r1)
|
|
ld r30,FRAME_SIZE-16(r1)
|
|
addi r1,r1,FRAME_SIZE
|
|
bctr
|
|
|
|
L(do_pltexit):
|
|
la r10,(VR_PARMS+0)(r1)
|
|
la r9,(VR_PARMS+16)(r1)
|
|
beq L(restoreFXR2)
|
|
li r11,32
|
|
li r12,64
|
|
lvx v2,0,r10
|
|
lvx v3,0,r9
|
|
|
|
lvx v4,r11,r10
|
|
lvx v5,r11,r9
|
|
addi r11,r11,64
|
|
|
|
lvx v6,r12,r10
|
|
lvx v7,r12,r9
|
|
addi r12,r12,64
|
|
|
|
lvx v8,r11,r10
|
|
lvx v9,r11,r9
|
|
addi r11,r11,64
|
|
|
|
lvx v10,r12,r10
|
|
lvx v11,r12,r9
|
|
|
|
lvx v12,r11,r10
|
|
lvx v13,r11,r9
|
|
L(restoreFXR2):
|
|
ld r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
|
|
ld r10,INT_PARMS+56(r1)
|
|
ld r9,INT_PARMS+48(r1)
|
|
ld r8,INT_PARMS+40(r1)
|
|
ld r7,INT_PARMS+32(r1)
|
|
mtlr r0
|
|
ld r6,INT_PARMS+24(r1)
|
|
ld r5,INT_PARMS+16(r1)
|
|
ld r4,INT_PARMS+8(r1)
|
|
/* Prepare for calling the function returned by fixup. */
|
|
std r2,FRAME_TOC_SAVE(r1)
|
|
PPC64_LOAD_FUNCPTR r3
|
|
ld r3,INT_PARMS+0(r1)
|
|
/* Load the floating point registers. */
|
|
lfd fp1,FPR_PARMS+0(r1)
|
|
lfd fp2,FPR_PARMS+8(r1)
|
|
lfd fp3,FPR_PARMS+16(r1)
|
|
lfd fp4,FPR_PARMS+24(r1)
|
|
lfd fp5,FPR_PARMS+32(r1)
|
|
lfd fp6,FPR_PARMS+40(r1)
|
|
lfd fp7,FPR_PARMS+48(r1)
|
|
lfd fp8,FPR_PARMS+56(r1)
|
|
lfd fp9,FPR_PARMS+64(r1)
|
|
lfd fp10,FPR_PARMS+72(r1)
|
|
lfd fp11,FPR_PARMS+80(r1)
|
|
lfd fp12,FPR_PARMS+88(r1)
|
|
lfd fp13,FPR_PARMS+96(r1)
|
|
/* Call the target function. */
|
|
bctrl
|
|
ld r2,FRAME_TOC_SAVE(r1)
|
|
lwz r12,VR_VRSAVE(r1)
|
|
/* But return here and store the return values. */
|
|
std r3,INT_RTN(r1)
|
|
std r4,INT_RTN+8(r1)
|
|
stfd fp1,FPR_RTN+0(r1)
|
|
stfd fp2,FPR_RTN+8(r1)
|
|
cmpdi cr0,r12,0
|
|
la r10,VR_RTN(r1)
|
|
stfd fp3,FPR_RTN+16(r1)
|
|
stfd fp4,FPR_RTN+24(r1)
|
|
#if _CALL_ELF == 2
|
|
la r12,VR_RTN+16(r1)
|
|
stfd fp5,FPR_RTN+32(r1)
|
|
stfd fp6,FPR_RTN+40(r1)
|
|
li r5,32
|
|
li r6,64
|
|
stfd fp7,FPR_RTN+48(r1)
|
|
stfd fp8,FPR_RTN+56(r1)
|
|
stfd fp9,FPR_RTN+64(r1)
|
|
stfd fp10,FPR_RTN+72(r1)
|
|
#endif
|
|
mr r3,r31
|
|
mr r4,r30
|
|
beq L(callpltexit)
|
|
stvx v2,0,r10
|
|
#if _CALL_ELF == 2
|
|
stvx v3,0,r12
|
|
stvx v4,r5,r10
|
|
stvx v5,r5,r12
|
|
addi r5,r5,64
|
|
stvx v6,r6,r10
|
|
stvx v7,r6,r12
|
|
stvx v8,r5,r10
|
|
stvx v9,r5,r12
|
|
#endif
|
|
L(callpltexit):
|
|
addi r5,r1,INT_PARMS
|
|
addi r6,r1,INT_RTN
|
|
bl JUMPTARGET(_dl_call_pltexit)
|
|
#ifndef SHARED
|
|
nop
|
|
#endif
|
|
/* Restore the return values from target function. */
|
|
lwz r12,VR_VRSAVE(r1)
|
|
ld r3,INT_RTN(r1)
|
|
ld r4,INT_RTN+8(r1)
|
|
lfd fp1,FPR_RTN+0(r1)
|
|
lfd fp2,FPR_RTN+8(r1)
|
|
cmpdi cr0,r12,0
|
|
la r11,VR_RTN(r1)
|
|
lfd fp3,FPR_RTN+16(r1)
|
|
lfd fp4,FPR_RTN+24(r1)
|
|
#if _CALL_ELF == 2
|
|
la r12,VR_RTN+16(r1)
|
|
lfd fp5,FPR_RTN+32(r1)
|
|
lfd fp6,FPR_RTN+40(r1)
|
|
li r30,32
|
|
li r31,64
|
|
lfd fp7,FPR_RTN+48(r1)
|
|
lfd fp8,FPR_RTN+56(r1)
|
|
lfd fp9,FPR_RTN+64(r1)
|
|
lfd fp10,FPR_RTN+72(r1)
|
|
#endif
|
|
beq L(pltexitreturn)
|
|
lvx v2,0,r11
|
|
#if _CALL_ELF == 2
|
|
lvx v3,0,r12
|
|
lvx v4,r30,r11
|
|
lvx v5,r30,r12
|
|
addi r30,r30,64
|
|
lvx v6,r31,r11
|
|
lvx v7,r31,r12
|
|
lvx v8,r30,r11
|
|
lvx v9,r30,r12
|
|
#endif
|
|
L(pltexitreturn):
|
|
ld r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
|
|
ld r31,FRAME_SIZE-8(r1)
|
|
ld r30,FRAME_SIZE-16(r1)
|
|
mtlr r0
|
|
ld r1,0(r1)
|
|
blr
|
|
END(_dl_profile_resolve)
|
|
#endif
|