1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2008 CodeSourcery 3 Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com> 4 5This file is part of libunwind. 6 7Permission is hereby granted, free of charge, to any person obtaining 8a copy of this software and associated documentation files (the 9"Software"), to deal in the Software without restriction, including 10without limitation the rights to use, copy, modify, merge, publish, 11distribute, sublicense, and/or sell copies of the Software, and to 12permit persons to whom the Software is furnished to do so, subject to 13the following conditions: 14 15The above copyright notice and this permission notice shall be 16included in all copies or substantial portions of the Software. 17 18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26#include "offsets.h" 27 28 .text 29 30#if _MIPS_SIM == _ABIO32 31# if defined(__MIPSEB__) 32# define OFFSET 4 33# else 34# define OFFSET 0 35# endif 36# define SREG(X) \ 37 sw $X, (LINUX_UC_MCONTEXT_GREGS + 8 * X + OFFSET) ($4); \ 38 sra $1, $X, 31; \ 39 sw $1, (LINUX_UC_MCONTEXT_GREGS + 8 * X + 4 - OFFSET) ($4) 40/* Yes, we save the return address to PC. */ 41# define SPC \ 42 sw $31, (LINUX_UC_MCONTEXT_PC + OFFSET) ($4); \ 43 sra $1, $31, 31; \ 44 sw $1, (LINUX_UC_MCONTEXT_PC + 4 - OFFSET) ($4) 45#else 46# define SREG(X) sd $X, (LINUX_UC_MCONTEXT_GREGS + 8 * X) ($4) 47# define SPC sd $31, (LINUX_UC_MCONTEXT_PC) ($4) 48#endif 49 50 .global _Umips_getcontext 51 .type _Umips_getcontext, %function 52 # This is a stub version of getcontext() for MIPS which only stores core 53 # registers. 54_Umips_getcontext: 55 .set noat 56 SREG (0) 57 SREG (1) 58 SREG (2) 59 SREG (3) 60 SREG (4) 61 SREG (5) 62 SREG (6) 63 SREG (7) 64 SREG (8) 65 SREG (9) 66 SREG (10) 67 SREG (11) 68 SREG (12) 69 SREG (13) 70 SREG (14) 71 SREG (15) 72 SREG (16) 73 SREG (17) 74 SREG (18) 75 SREG (19) 76 SREG (20) 77 SREG (21) 78 SREG (22) 79 SREG (23) 80 SREG (24) 81 SREG (25) 82 SREG (26) 83 SREG (27) 84 SREG (28) 85 SREG (29) 86 SREG (30) 87 SREG (31) 88 SPC 89 li $2, 0 90 j $31 91 92 .size _Umips_getcontext, .-_Umips_getcontext 93