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Diffstat (limited to 'sysdeps/powerpc/powerpc32/dl-trampoline.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/dl-trampoline.S | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/dl-trampoline.S b/sysdeps/powerpc/powerpc32/dl-trampoline.S new file mode 100644 index 0000000000..5585192ea8 --- /dev/null +++ b/sysdeps/powerpc/powerpc32/dl-trampoline.S @@ -0,0 +1,113 @@ +/* PLT trampolines. PPC32 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. */ + +#include <sysdep.h> + + .section ".text" + .align 2 + .globl _dl_runtime_resolve + .type _dl_runtime_resolve,@function +_dl_runtime_resolve: + # 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 1,-64(1) + stw 0,12(1) + stw 3,16(1) + stw 4,20(1) + # The code that calls this has put parameters for `fixup' in r12 and r11. + mr 3,12 + stw 5,24(1) + mr 4,11 + stw 6,28(1) + mflr 0 + # We also need to save some of the condition register fields + stw 7,32(1) + stw 0,48(1) + stw 8,36(1) + mfcr 0 + stw 9,40(1) + stw 10,44(1) + stw 0,8(1) + bl _dl_fixup@local + # 'fixup' returns the address we want to branch to. + mtctr 3 + # Put the registers back... + lwz 0,48(1) + lwz 10,44(1) + lwz 9,40(1) + mtlr 0 + lwz 8,36(1) + lwz 0,8(1) + lwz 7,32(1) + lwz 6,28(1) + mtcrf 0xFF,0 + lwz 5,24(1) + lwz 4,20(1) + lwz 3,16(1) + lwz 0,12(1) + # ...unwind the stack frame, and jump to the PLT entry we updated. + addi 1,1,64 + bctr + .size _dl_runtime_resolve,.-_dl_runtime_resolve + + .align 2 + .globl _dl_prof_resolve + .type _dl_prof_resolve,@function +_dl_prof_resolve: + # 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 1,-64(1) + stw 0,12(1) + stw 3,16(1) + stw 4,20(1) + # The code that calls this has put parameters for `fixup' in r12 and r11. + mr 3,12 + stw 5,24(1) + mr 4,11 + stw 6,28(1) + mflr 5 + # We also need to save some of the condition register fields. + stw 7,32(1) + stw 5,48(1) + stw 8,36(1) + mfcr 0 + stw 9,40(1) + stw 10,44(1) + stw 0,8(1) + bl _dl_profile_fixup@local + # 'fixup' returns the address we want to branch to. + mtctr 3 + # Put the registers back... + lwz 0,48(1) + lwz 10,44(1) + lwz 9,40(1) + mtlr 0 + lwz 8,36(1) + lwz 0,8(1) + lwz 7,32(1) + lwz 6,28(1) + mtcrf 0xFF,0 + lwz 5,24(1) + lwz 4,20(1) + lwz 3,16(1) + lwz 0,12(1) + # ...unwind the stack frame, and jump to the PLT entry we updated. + addi 1,1,64 + bctr + .size _dl_prof_resolve,.-_dl_prof_resolve |