diff options
Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/powerpc32/ppc-mcount.S')
| -rw-r--r-- | REORG.TODO/sysdeps/powerpc/powerpc32/ppc-mcount.S | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/powerpc32/ppc-mcount.S b/REORG.TODO/sysdeps/powerpc/powerpc32/ppc-mcount.S new file mode 100644 index 0000000000..8a6b205c37 --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/powerpc32/ppc-mcount.S @@ -0,0 +1,104 @@ +/* PowerPC-specific implementation of profiling support. + Copyright (C) 1997-2017 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/>. */ + +/* This would be bad. */ +#ifdef PROF +#undef PROF +#endif + +#include <sysdep.h> + +/* We do profiling as described in the SYSV ELF ABI, except that glibc + _mcount manages its own counters. The caller has put the address the + caller will return to in the usual place on the stack, 4(r1). _mcount + is responsible for ensuring that when it returns no argument-passing + registers are disturbed, and that the LR is set back to (what the + caller sees as) 4(r1). + + This is intended so that the following code can be inserted at the + front of any routine without changing the routine: + + .data + mflr r0 + stw r0,4(r1) + bl _mcount +*/ + +ENTRY(_mcount) +#if defined PIC && !defined SHARED +# define CALLER_LR_OFFSET 68 + stwu r1,-64(r1) + cfi_adjust_cfa_offset (64) + stw r30, 48(r1) + cfi_rel_offset (r30, 48) +#else +# define CALLER_LR_OFFSET 52 + stwu r1,-48(r1) + cfi_adjust_cfa_offset (48) +#endif +/* We need to save the parameter-passing registers. */ + stw r3, 12(r1) + stw r4, 16(r1) + stw r5, 20(r1) + stw r6, 24(r1) + mflr r4 +#if defined PIC && !defined SHARED + bcl 20,31,0f +0: + mflr r30 + addis r30, r30, _GLOBAL_OFFSET_TABLE_-0b@ha + addi r30, r30, _GLOBAL_OFFSET_TABLE_-0b@l +#endif + lwz r3, CALLER_LR_OFFSET(r1) + mfcr r5 + stw r7, 28(r1) + stw r8, 32(r1) + stw r9, 36(r1) + stw r10,40(r1) + stw r4, 44(r1) + cfi_rel_offset (lr, 44) + stw r5, 8(r1) +#ifndef SHARED + bl JUMPTARGET(__mcount_internal) +#else + bl __mcount_internal@local +#endif + /* Restore the registers... */ + lwz r6, 8(r1) + lwz r0, 44(r1) + lwz r3, 12(r1) + mtctr r0 + lwz r4, 16(r1) + mtcrf 0xff,r6 + lwz r5, 20(r1) + lwz r6, 24(r1) + lwz r0, CALLER_LR_OFFSET(r1) + lwz r7, 28(r1) + lwz r8, 32(r1) + mtlr r0 + lwz r9, 36(r1) + lwz r10,40(r1) + /* ...unwind the stack frame, and return to your usual programming. */ +#if defined PIC && !defined SHARED + lwz r30, 48(r1) + addi r1,r1,64 +#else + addi r1,r1,48 +#endif + bctr +END(_mcount) |