| /* setjmp for ARM. |
| Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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/>. */ |
| |
| #include <sysdep.h> |
| #include <stap-probe.h> |
| #include <bits/setjmp.h> |
| #include <rtld-global-offsets.h> |
| #include <arm-features.h> |
| |
| ENTRY (__sigsetjmp) |
| #ifdef PTR_MANGLE |
| PTR_MANGLE_LOAD (a3, ip) |
| #endif |
| mov ip, r0 |
| |
| /* setjmp probe expects sigsetjmp first argument (4@r0), second |
| argument (-4@r1), and target address (4@r14), respectively. */ |
| LIBC_PROBE (setjmp, 3, 4@r0, -4@r1, 4@r14) |
| |
| /* Save sp and lr */ |
| #ifdef PTR_MANGLE |
| mov a4, sp |
| PTR_MANGLE2 (a4, a4, a3) |
| str a4, [ip], #4 |
| PTR_MANGLE2 (a4, lr, a3) |
| str a4, [ip], #4 |
| #else |
| str sp, [ip], #4 |
| str lr, [ip], #4 |
| #endif |
| /* Save registers */ |
| stmia ip!, JMP_BUF_REGLIST |
| |
| #if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__ |
| # define NEED_HWCAP 1 |
| #endif |
| |
| #ifdef NEED_HWCAP |
| /* Check if we have a VFP unit. */ |
| # if IS_IN (rtld) |
| LDST_PCREL (ldr, a3, a4, \ |
| C_SYMBOL_NAME(_rtld_local_ro) \ |
| + RTLD_GLOBAL_RO_DL_HWCAP_OFFSET) |
| # else |
| # ifdef SHARED |
| LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_rtld_global_ro), \ |
| RTLD_GLOBAL_RO_DL_HWCAP_OFFSET) |
| # else |
| LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_dl_hwcap), 0) |
| # endif |
| # endif |
| #endif |
| |
| #ifdef __SOFTFP__ |
| tst a3, #HWCAP_ARM_VFP |
| beq .Lno_vfp |
| #endif |
| |
| /* Store the VFP registers. |
| Don't use VFP instructions directly because this code |
| is used in non-VFP multilibs. */ |
| /* Following instruction is vstmia ip!, {d8-d15}. */ |
| stc p11, cr8, [ip], #64 |
| .Lno_vfp: |
| |
| #ifndef ARM_ASSUME_NO_IWMMXT |
| tst a3, #HWCAP_ARM_IWMMXT |
| beq .Lno_iwmmxt |
| |
| /* Save the call-preserved iWMMXt registers. */ |
| /* Following instructions are wstrd wr10, [ip], #8 (etc.) */ |
| stcl p1, cr10, [r12], #8 |
| stcl p1, cr11, [r12], #8 |
| stcl p1, cr12, [r12], #8 |
| stcl p1, cr13, [r12], #8 |
| stcl p1, cr14, [r12], #8 |
| stcl p1, cr15, [r12], #8 |
| .Lno_iwmmxt: |
| #endif |
| |
| /* Make a tail call to __sigjmp_save; it takes the same args. */ |
| B PLTJMP(C_SYMBOL_NAME(__sigjmp_save)) |
| |
| END (__sigsetjmp) |
| |
| hidden_def (__sigsetjmp) |
