From 9595fb8cd595028bece5174e7eddf660ae3dcc10 Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Thu, 31 May 2018 01:04:17 +0200 Subject: risc-v: initial 64 bit port, static only (no TLS/NPTL) Only a simple hello world is tested in qemu system emulation. --- libc/sysdeps/linux/riscv64/jmpbuf-unwind.h | 46 ++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 libc/sysdeps/linux/riscv64/jmpbuf-unwind.h (limited to 'libc/sysdeps/linux/riscv64/jmpbuf-unwind.h') diff --git a/libc/sysdeps/linux/riscv64/jmpbuf-unwind.h b/libc/sysdeps/linux/riscv64/jmpbuf-unwind.h new file mode 100644 index 000000000..2e5f37f10 --- /dev/null +++ b/libc/sysdeps/linux/riscv64/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 + . */ + +#include +#include +#include +#include + +/* 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) -- cgit v1.2.3