| /* PLT trampolines. PPC32 version. |
| Copyright (C) 2005, 2006 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., 51 Franklin Street, Fifth Floor, Boston MA |
| 02110-1301 USA. */ |
| |
| #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) |
| # 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) |
| # 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) |
| # 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) |
| # ...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 |
