| /* longjmp 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> |
| |
| /* __longjmp(jmpbuf, val) */ |
| |
| ENTRY (__longjmp) |
| mov ip, r0 |
| |
| #ifdef CHECK_SP |
| ldr r4, [ip] /* jmpbuf's sp */ |
| cfi_undefined (r4) |
| #ifdef PTR_DEMANGLE |
| PTR_DEMANGLE (r4, r4, a3, a4) |
| #endif |
| CHECK_SP (r4) |
| #endif |
| |
| #ifdef PTR_DEMANGLE |
| ldr a4, [ip], #4 |
| PTR_DEMANGLE (a4, a4, a3, r4) |
| cfi_undefined (r4) |
| ldr r4, [ip], #4 |
| PTR_DEMANGLE2 (r4, r4, a3) |
| #else |
| ldr a4, [ip], #4 |
| ldr r4, [ip], #4 |
| cfi_undefined (r4) |
| #endif |
| /* longjmp probe expects longjmp first argument (4@r0), second |
| argument (-4@r1), and target address (4@r4), respectively. */ |
| LIBC_PROBE (longjmp, 3, 4@r0, -4@r1, 4@r4) |
| mov sp, a4 |
| mov lr, r4 |
| ldmia ip!, JMP_BUF_REGLIST |
| cfi_restore (v1) |
| cfi_restore (v2) |
| cfi_restore (v3) |
| cfi_restore (v4) |
| cfi_restore (v5) |
| cfi_restore (v6) |
| cfi_restore (sl) |
| cfi_restore (fp) |
| cfi_restore (sp) |
| cfi_restore (lr) |
| |
| #if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__ |
| # define NEED_HWCAP 1 |
| #endif |
| |
| #ifdef NEED_HWCAP |
| # if IS_IN (rtld) |
| LDST_PCREL (ldr, a4, a3, \ |
| C_SYMBOL_NAME(_rtld_local_ro) \ |
| + RTLD_GLOBAL_RO_DL_HWCAP_OFFSET) |
| # else |
| # ifdef SHARED |
| LDR_GLOBAL (a4, a3, C_SYMBOL_NAME(_rtld_global_ro), \ |
| RTLD_GLOBAL_RO_DL_HWCAP_OFFSET) |
| # else |
| LDR_GLOBAL (a4, a3, C_SYMBOL_NAME(_dl_hwcap), 0) |
| # endif |
| # endif |
| #endif |
| |
| #ifdef __SOFTFP__ |
| tst a4, #HWCAP_ARM_VFP |
| beq .Lno_vfp |
| #endif |
| |
| /* Restore the VFP registers. */ |
| /* Following instruction is vldmia ip!, {d8-d15}. */ |
| ldc p11, cr8, [r12], #64 |
| .Lno_vfp: |
| |
| #ifndef ARM_ASSUME_NO_IWMMXT |
| tst a4, #HWCAP_ARM_IWMMXT |
| beq .Lno_iwmmxt |
| |
| /* Restore the call-preserved iWMMXt registers. */ |
| /* Following instructions are wldrd wr10, [ip], #8 (etc.) */ |
| ldcl p1, cr10, [r12], #8 |
| ldcl p1, cr11, [r12], #8 |
| ldcl p1, cr12, [r12], #8 |
| ldcl p1, cr13, [r12], #8 |
| ldcl p1, cr14, [r12], #8 |
| ldcl p1, cr15, [r12], #8 |
| .Lno_iwmmxt: |
| #endif |
| |
| /* longjmp_target probe expects longjmp first argument (4@r0), second |
| argument (-4@r1), and target address (4@r14), respectively. */ |
| LIBC_PROBE (longjmp_target, 3, 4@r0, -4@r1, 4@r14) |
| |
| movs r0, r1 /* get the return value in place */ |
| it eq |
| moveq r0, #1 /* can't let setjmp() return zero! */ |
| |
| DO_RET(lr) |
| |
| END (__longjmp) |
