| /* Copyright (C) 2011-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. |
| Based on work contributed by David Mosberger (davidm@cs.arizona.edu). |
| |
| 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/>. */ |
| |
| /* Assembly stub to invoke __mcount_internal(). Compiler-generated |
| code calls mcount after executing a function's prologue, placing |
| the "lr" register in "r10" for the call. As a result "lr" is the |
| function that invoked mcount, and "r10" is mcount's caller's |
| caller. However, we have to save all the parameter registers here |
| before invoking _mcount_internal. Callee-save and temporary |
| registers need no special attention. We save r10 and restore it to |
| lr on the way out, to properly handle the case of ENTRY() in |
| assembly code, before lr is saved. We use the name __mcount since |
| the gcc community prefers using the reserved namespace. */ |
| |
| #include <sysdep.h> |
| |
| .text |
| ENTRY(__mcount) |
| { |
| ST sp, lr |
| ADDI_PTR r29, sp, - (12 * REGSIZE) |
| } |
| cfi_offset (lr, 0) |
| { |
| ADDI_PTR sp, sp, - (13 * REGSIZE) |
| ST r29, sp |
| ADDI_PTR r29, r29, REGSIZE |
| } |
| cfi_def_cfa_offset (13 * REGSIZE) |
| { ST r29, r0; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r1; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r2; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r3; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r4; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r5; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r6; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r7; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r8; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r9; ADDI_PTR r29, r29, REGSIZE } |
| { ST r29, r10; ADDI_PTR r29, r29, REGSIZE; move r0, r10 } |
| { |
| move r1, lr |
| jal __mcount_internal |
| } |
| { |
| ADDI_PTR r29, sp, (2 * REGSIZE) |
| } |
| { LD r0, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r1, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r2, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r3, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r4, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r5, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r6, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r7, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r8, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r9, r29; ADDI_PTR r29, r29, REGSIZE } |
| { LD r10, r29; ADDI_PTR sp, sp, (13 * REGSIZE) } |
| cfi_def_cfa_offset (0) |
| { |
| LD lr, sp |
| } |
| { |
| move lr, r10 |
| jrp lr |
| } |
| END(__mcount) |
| |
| #undef mcount |
| weak_alias (__mcount, _mcount) /* exported in gmon/Versions */ |
| weak_alias (__mcount, mcount) /* exported in stdlib/Versions */ |
