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/* PLT trampolines. PPC32 version.
Copyright (C) 2005-2023 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
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
.section ".text"
.align 2
.globl _dl_runtime_resolve
.type _dl_runtime_resolve,@function
_dl_runtime_resolve:
cfi_startproc
# We need to save the registers used to pass parameters, and register 0,
# which is used by _mcount; the registers are saved in a stack frame.
stwu r1,-64(r1)
cfi_adjust_cfa_offset (64)
stw r0,12(r1)
stw r3,16(r1)
stw r4,20(r1)
# The code that calls this has put parameters for `fixup' in r12 and r11.
mr r3,r12
stw r5,24(r1)
mr r4,r11
stw r6,28(r1)
mflr r0
# We also need to save some of the condition register fields
stw r7,32(r1)
# Don't clobber the caller's LRSAVE, it is needed by _mcount.
stw r0,48(r1)
cfi_offset (lr, -16)
stw r8,36(r1)
mfcr r0
stw r9,40(r1)
stw r10,44(r1)
stw r0,8(r1)
bl _dl_fixup@local
# 'fixup' returns the address we want to branch to.
mtctr r3
# Put the registers back...
lwz r0,48(r1)
lwz r10,44(r1)
lwz r9,40(r1)
mtlr r0
lwz r8,36(r1)
lwz r0,8(r1)
lwz r7,32(r1)
lwz r6,28(r1)
mtcrf 0xFF,r0
lwz r5,24(r1)
lwz r4,20(r1)
lwz r3,16(r1)
lwz r0,12(r1)
# ...unwind the stack frame, and jump to the PLT entry we updated.
addi r1,r1,64
bctr
cfi_endproc
.size _dl_runtime_resolve,.-_dl_runtime_resolve
#ifndef PROF
.align 2
.globl _dl_prof_resolve
.type _dl_prof_resolve,@function
_dl_prof_resolve:
cfi_startproc
# We need to save the registers used to pass parameters, and register 0,
# which is used by _mcount; the registers are saved in a stack frame.
stwu r1,-320(r1)
cfi_adjust_cfa_offset (320)
/* Stack layout:
+312 stackframe
+308 lr
+304 r1
+288 v12
+272 v11
+256 v10
+240 v9
+224 v8
+208 v7
+192 v6
+176 v5
+160 v4
+144 v3
+128 v2
+112 v1
+104 fp8
+96 fp7
+88 fp6
+80 fp5
+72 fp4
+64 fp3
+56 fp2
+48 fp1
+44 r10
+40 r9
+36 r8
+32 r7
+28 r6
+24 r5
+20 r4
+16 r3
+12 r0
+8 cr
r1 link
*/
stw r0,12(r1)
stw r3,16(r1)
stw r4,20(r1)
# The code that calls this has put parameters for `fixup' in r12 and r11.
mr r3,r12
stw r5,24(r1)
mr r4,r11
stw r6,28(r1)
mflr r5
# We also need to save some of the condition register fields.
stw r7,32(r1)
# Don't clobber the caller's LRSAVE, it is needed by _mcount.
stw r5,308(r1)
cfi_offset (lr, -12)
stw r8,36(r1)
mfcr r0
stw r9,40(r1)
stw r10,44(r1)
stw r0,8(r1)
#ifndef __NO_FPRS__
# Save the floating point registers
stfd fp1,48(r1)
stfd fp2,56(r1)
stfd fp3,64(r1)
stfd fp4,72(r1)
stfd fp5,80(r1)
stfd fp6,88(r1)
stfd fp7,96(r1)
stfd fp8,104(r1)
#endif
# XXX TODO: store vmx registers
# Load the extra parameters.
addi r6,r1,16
addi r7,r1,312
li r0,-1
stw r0,0(r7)
bl _dl_profile_fixup@local
# 'fixup' returns the address we want to branch to.
mtctr r3
# Put the registers back...
lwz r0,308(r1)
lwz r10,44(r1)
lwz r9,40(r1)
mtlr r0
lwz r8,36(r1)
lwz r0,8(r1)
lwz r7,32(r1)
lwz r6,28(r1)
mtcrf 0xFF,r0
lwz r5,24(r1)
lwz r4,20(r1)
lwz r3,16(r1)
lwz r0,12(r1)
#ifndef __NO_FPRS__
# Load the floating point registers.
lfd fp1,48(r1)
lfd fp2,56(r1)
lfd fp3,64(r1)
lfd fp4,72(r1)
lfd fp5,80(r1)
lfd fp6,88(r1)
lfd fp7,96(r1)
lfd fp8,104(r1)
#endif
# ...unwind the stack frame, and jump to the PLT entry we updated.
addi r1,r1,320
bctr
cfi_endproc
.size _dl_prof_resolve,.-_dl_prof_resolve
#endif
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