projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2011-2015 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 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 63d143a2 CM |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | #include <jmpbuf-offsets.h> | |
| 21 | #include <asm-syntax.h> | |
| 22 | #include <arch/spr_def.h> | |
| 23 | ||
| 24 | /* PL to return to via iret in longjmp */ | |
| 25 | #define RETURN_PL 0 | |
| 26 | ||
| 27 | .text | |
| 28 | ENTRY (__longjmp) | |
| 29 | FEEDBACK_ENTER(__longjmp) | |
| 30 | ||
| 31 | #define RESTORE(r) { LD r, r0 ; ADDI_PTR r0, r0, REGSIZE } | |
| 32 | FOR_EACH_CALLEE_SAVED_REG(RESTORE) | |
| 33 | ||
| 34 | /* Make longjmp(buf, 0) return "1" instead. | |
| 35 | At the same time, construct our iret context; we set ICS so | |
| 36 | we can validly load EX_CONTEXT for iret without being | |
| 37 | interrupted halfway through. */ | |
| 38 | { | |
| 39 | LD r2, r0 /* retrieve ICS bit from jmp_buf */ | |
| 40 | movei r3, 1 | |
| 41 | CMPEQI r0, r1, 0 | |
| 42 | } | |
| 43 | { | |
| 44 | mtspr INTERRUPT_CRITICAL_SECTION, r3 | |
| 45 | shli r2, r2, SPR_EX_CONTEXT_0_1__ICS_SHIFT | |
| 46 | } | |
| 47 | { | |
| 48 | mtspr EX_CONTEXT_0_0, lr | |
| 49 | ori r2, r2, RETURN_PL | |
| 50 | } | |
| 51 | { | |
| 52 | or r0, r1, r0 | |
| 53 | mtspr EX_CONTEXT_0_1, r2 | |
| 54 | } | |
| 55 | iret | |
| 56 | jrp lr /* Keep the backtracer happy. */ | |
| 57 | END (__longjmp) |