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authorWaldemar Brodkorb <wbrodkorb@conet.de>2018-05-31 01:04:17 +0200
committerWaldemar Brodkorb <wbrodkorb@conet.de>2018-06-10 06:35:18 +0200
commit9595fb8cd595028bece5174e7eddf660ae3dcc10 (patch)
tree56ffac7a96d15a2a9c825a4f96c3f1bcea7c4fa0 /libc/sysdeps/linux/riscv64/sys/asm.h
parentdf8caec1978cb5fe7d9a7e7ea9dd773605e89032 (diff)
risc-v: initial 64 bit port, static only (no TLS/NPTL)
Only a simple hello world is tested in qemu system emulation.
Diffstat (limited to 'libc/sysdeps/linux/riscv64/sys/asm.h')
-rw-r--r--libc/sysdeps/linux/riscv64/sys/asm.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/riscv64/sys/asm.h b/libc/sysdeps/linux/riscv64/sys/asm.h
new file mode 100644
index 000000000..ddb84b683
--- /dev/null
+++ b/libc/sysdeps/linux/riscv64/sys/asm.h
@@ -0,0 +1,63 @@
+/* Miscellaneous macros.
+ Copyright (C) 2000-2018 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/>. */
+
+#ifndef _SYS_ASM_H
+#define _SYS_ASM_H
+
+/* Macros to handle different pointer/register sizes for 32/64-bit code. */
+#if __riscv_xlen == 64
+# define PTRLOG 3
+# define SZREG 8
+# define REG_S sd
+# define REG_L ld
+#elif __riscv_xlen == 32
+# error "rv32i-based targets are not supported"
+#else
+# error __riscv_xlen must equal 32 or 64
+#endif
+
+#if !defined __riscv_float_abi_soft
+/* For ABI uniformity, reserve 8 bytes for floats, even if double-precision
+ floating-point is not supported in hardware. */
+# if defined __riscv_float_abi_double
+# define FREG_L fld
+# define FREG_S fsd
+# define SZFREG 8
+# else
+# error unsupported FLEN
+# endif
+#endif
+
+/* Declare leaf routine. */
+#define LEAF(symbol) \
+ .globl symbol; \
+ .align 2; \
+ .type symbol,@function; \
+symbol: \
+ cfi_startproc;
+
+/* Mark end of function. */
+#undef END
+#define END(function) \
+ cfi_endproc; \
+ .size function,.-function
+
+/* Stack alignment. */
+#define ALMASK ~15
+
+#endif /* sys/asm.h */