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-rw-r--r--ports/sysdeps/arm/setjmp.S98
1 files changed, 98 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/setjmp.S b/ports/sysdeps/arm/setjmp.S
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+++ b/ports/sysdeps/arm/setjmp.S
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+/* setjmp for ARM.
+ Copyright (C) 1997, 1998, 2005, 2006, 2008 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>
+#define _SETJMP_H
+#define _ASM
+#include <bits/setjmp.h>
+#include <rtld-global-offsets.h>
+
+ENTRY (__sigsetjmp)
+ mov ip, r0
+
+ /* Save registers */
+ stmia ip!, {v1-v6, sl, fp, sp, lr}
+
+ /* Check if we have a VFP unit. */
+#ifdef IS_IN_rtld
+ ldr a3, 1f
+ ldr a4, Lrtld_local_ro
+0: add a3, pc, a3
+ add a3, a3, a4
+ ldr a3, [a3, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET]
+#else
+#ifdef PIC
+ ldr a3, 1f
+ ldr a4, Lrtld_global_ro
+0: add a3, pc, a3
+ ldr a3, [a3, a4]
+ ldr a3, [a3, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET]
+#else
+ ldr a3, Lhwcap
+ ldr a3, [a3, #0]
+#endif
+#endif
+
+ tst a3, #HWCAP_ARM_VFP
+ beq Lno_vfp
+
+ /* 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
+ /* Store the floating-point status register. */
+ /* Following instruction is vmrs a4, fpscr. */
+ mrc p10, 7, a4, cr1, cr0, 0
+ str a4, [ip], #4
+Lno_vfp:
+
+ 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:
+
+ /* Make a tail call to __sigjmp_save; it takes the same args. */
+ B PLTJMP(C_SYMBOL_NAME(__sigjmp_save))
+
+#ifdef IS_IN_rtld
+1: .long _GLOBAL_OFFSET_TABLE_ - 0b - 8
+Lrtld_local_ro:
+ .long C_SYMBOL_NAME(_rtld_local_ro)(GOTOFF)
+#else
+#ifdef PIC
+1: .long _GLOBAL_OFFSET_TABLE_ - 0b - 8
+Lrtld_global_ro:
+ .long C_SYMBOL_NAME(_rtld_global_ro)(GOT)
+#else
+Lhwcap:
+ .long C_SYMBOL_NAME(_dl_hwcap)
+#endif
+#endif
+
+END (__sigsetjmp)
+
+hidden_def (__sigsetjmp)