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Diffstat (limited to 'ports/sysdeps/tile/_mcount.S')
| -rw-r--r-- | ports/sysdeps/tile/_mcount.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/ports/sysdeps/tile/_mcount.S b/ports/sysdeps/tile/_mcount.S new file mode 100644 index 0000000000..4754639c91 --- /dev/null +++ b/ports/sysdeps/tile/_mcount.S @@ -0,0 +1,87 @@ +/* Copyright (C) 2011 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 */ |