projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7a9f785 | 1 | /* Copyright (C) 2011-2016 Free Software Foundation, Inc. |
| 63d143a2 CM |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
| 4 | Based on work contributed by David Mosberger (davidm@cs.arizona.edu). | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
17 | License along with the GNU C Library. If not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 63d143a2 CM |
19 | |
| 20 | /* Assembly stub to invoke __mcount_internal(). Compiler-generated | |
| 21 | code calls mcount after executing a function's prologue, placing | |
| 22 | the "lr" register in "r10" for the call. As a result "lr" is the | |
| 23 | function that invoked mcount, and "r10" is mcount's caller's | |
| 24 | caller. However, we have to save all the parameter registers here | |
| 25 | before invoking _mcount_internal. Callee-save and temporary | |
| 26 | registers need no special attention. We save r10 and restore it to | |
| 27 | lr on the way out, to properly handle the case of ENTRY() in | |
| 28 | assembly code, before lr is saved. We use the name __mcount since | |
| 29 | the gcc community prefers using the reserved namespace. */ | |
| 30 | ||
| 31 | #include <sysdep.h> | |
| 32 | ||
| 33 | .text | |
| 34 | ENTRY(__mcount) | |
| 35 | { | |
| 36 | ST sp, lr | |
| 37 | ADDI_PTR r29, sp, - (12 * REGSIZE) | |
| 38 | } | |
| 39 | cfi_offset (lr, 0) | |
| 40 | { | |
| 41 | ADDI_PTR sp, sp, - (13 * REGSIZE) | |
| 42 | ST r29, sp | |
| 43 | ADDI_PTR r29, r29, REGSIZE | |
| 44 | } | |
| 45 | cfi_def_cfa_offset (13 * REGSIZE) | |
| 46 | { ST r29, r0; ADDI_PTR r29, r29, REGSIZE } | |
| 47 | { ST r29, r1; ADDI_PTR r29, r29, REGSIZE } | |
| 48 | { ST r29, r2; ADDI_PTR r29, r29, REGSIZE } | |
| 49 | { ST r29, r3; ADDI_PTR r29, r29, REGSIZE } | |
| 50 | { ST r29, r4; ADDI_PTR r29, r29, REGSIZE } | |
| 51 | { ST r29, r5; ADDI_PTR r29, r29, REGSIZE } | |
| 52 | { ST r29, r6; ADDI_PTR r29, r29, REGSIZE } | |
| 53 | { ST r29, r7; ADDI_PTR r29, r29, REGSIZE } | |
| 54 | { ST r29, r8; ADDI_PTR r29, r29, REGSIZE } | |
| 55 | { ST r29, r9; ADDI_PTR r29, r29, REGSIZE } | |
| 56 | { ST r29, r10; ADDI_PTR r29, r29, REGSIZE; move r0, r10 } | |
| 57 | { | |
| 58 | move r1, lr | |
| 59 | jal __mcount_internal | |
| 60 | } | |
| 61 | { | |
| 62 | ADDI_PTR r29, sp, (2 * REGSIZE) | |
| 63 | } | |
| 64 | { LD r0, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 65 | { LD r1, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 66 | { LD r2, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 67 | { LD r3, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 68 | { LD r4, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 69 | { LD r5, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 70 | { LD r6, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 71 | { LD r7, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 72 | { LD r8, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 73 | { LD r9, r29; ADDI_PTR r29, r29, REGSIZE } | |
| 74 | { LD r10, r29; ADDI_PTR sp, sp, (13 * REGSIZE) } | |
| 75 | cfi_def_cfa_offset (0) | |
| 76 | { | |
| 77 | LD lr, sp | |
| 78 | } | |
| 79 | { | |
| 80 | move lr, r10 | |
| 81 | jrp lr | |
| 82 | } | |
| 83 | END(__mcount) | |
| 84 | ||
| 85 | #undef mcount | |
| 86 | weak_alias (__mcount, _mcount) /* exported in gmon/Versions */ | |
| 87 | weak_alias (__mcount, mcount) /* exported in stdlib/Versions */ |