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authorWaldemar Brodkorb <wbx@openadk.org>2024-03-03 05:15:14 +0100
committerWaldemar Brodkorb <wbx@openadk.org>2024-03-03 05:15:50 +0100
commit1be78c337c45d8a090ae9c658a9146b5ada620b1 (patch)
treec2057ff3b5fd25856e39916a64acd4cb642926d7 /libc/sysdeps/linux/riscv32/jmpbuf-unwind.h
parent5e99f71185dc0ef42d4e8c9972cf57f76df5df04 (diff)
riscv32: decouple from riscv64
Diffstat (limited to 'libc/sysdeps/linux/riscv32/jmpbuf-unwind.h')
-rw-r--r--libc/sysdeps/linux/riscv32/jmpbuf-unwind.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/riscv32/jmpbuf-unwind.h b/libc/sysdeps/linux/riscv32/jmpbuf-unwind.h
new file mode 100644
index 000000000..2e5f37f10
--- /dev/null
+++ b/libc/sysdeps/linux/riscv32/jmpbuf-unwind.h
@@ -0,0 +1,46 @@
+/* Examine __jmp_buf for unwinding frames. RISC-V version.
+ Copyright (C) 2003-2018 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 <setjmp.h>
+#include <stdint.h>
+#include <unwind.h>
+#include <sysdep.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
+ ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
+
+static inline uintptr_t __attribute__ ((unused))
+_jmpbuf_sp (__jmp_buf regs)
+{
+ uintptr_t sp = regs[0].__sp;
+#ifdef PTR_DEMANGLE
+ PTR_DEMANGLE (sp);
+#endif
+ return sp;
+}
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
+
+/* We use the normal longjmp for unwinding. */
+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)