From 00345258e9355de2bef8ed1164c28f505c868e0a Mon Sep 17 00:00:00 2001
From: Alex Kotov <kotovalexarian@gmail.com>
Date: Sat, 15 Jan 2022 15:09:45 +0500
Subject: [PATCH] Add arch "riscv64"

---
 Makefile.am                    |  4 ++++
 configure.ac                   |  2 ++
 include/Makefile.am            |  2 ++
 include/kernaux.h              |  1 +
 include/kernaux/arch/riscv64.h | 14 ++++++++++++++
 include/kernaux/asm/riscv64.h  | 14 ++++++++++++++
 src/asm/riscv64.S              |  3 +++
 7 files changed, 40 insertions(+)
 create mode 100644 include/kernaux/arch/riscv64.h
 create mode 100644 include/kernaux/asm/riscv64.h
 create mode 100644 src/asm/riscv64.S

diff --git a/Makefile.am b/Makefile.am
index 36648a5..49df61f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -30,6 +30,10 @@ if ASM_I386
 libkernaux_a_SOURCES += src/asm/i386.S
 endif
 
+if ASM_RISCV64
+libkernaux_a_SOURCES += src/asm/riscv64.S
+endif
+
 if ASM_X86_64
 libkernaux_a_SOURCES += src/asm/x86_64.S
 endif
diff --git a/configure.ac b/configure.ac
index 001341c..5755d6b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -54,6 +54,7 @@ AS_IF([test "$with_libc" = yes], do_with_libc)
 
 dnl Architecture
 AM_CONDITIONAL([ASM_I386],          [test "$host_cpu" = i386])
+AM_CONDITIONAL([ASM_RISCV64],       [test "$host_cpu" = riscv64])
 AM_CONDITIONAL([ASM_X86_64],        [test "$host_cpu" = x86_64])
 
 dnl Features (disabled by default)
@@ -79,6 +80,7 @@ AM_CONDITIONAL([WITH_LIBC_STRLEN],  [test "$with_libc_strlen"  = yes])
 
 dnl Architecture
 AS_IF([test "$host_cpu" = i386],          [AC_DEFINE([ASM_I386],                  [1], [architecture is i386])])
+AS_IF([test "$host_cpu" = riscv64],       [AC_DEFINE([ASM_RISCV64],               [1], [architecture is RISC-V 64-bit])])
 AS_IF([test "$host_cpu" = x86_64],        [AC_DEFINE([ASM_X86_64],                [1], [architecture is x86_64])])
 
 dnl Features (disabled by default)
diff --git a/include/Makefile.am b/include/Makefile.am
index 18c976b..ebabbbc 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -1,8 +1,10 @@
 nobase_include_HEADERS = \
 	kernaux.h \
 	kernaux/arch/i386.h \
+	kernaux/arch/riscv64.h \
 	kernaux/arch/x86_64.h \
 	kernaux/asm/i386.h \
+	kernaux/asm/riscv64.h \
 	kernaux/asm/x86_64.h \
 	kernaux/assert.h \
 	kernaux/cmdline.h \
diff --git a/include/kernaux.h b/include/kernaux.h
index 86d490f..3d1572a 100644
--- a/include/kernaux.h
+++ b/include/kernaux.h
@@ -18,4 +18,5 @@
 #include <kernaux/units.h>
 
 #include <kernaux/arch/i386.h>
+#include <kernaux/arch/riscv64.h>
 #include <kernaux/arch/x86_64.h>
diff --git a/include/kernaux/arch/riscv64.h b/include/kernaux/arch/riscv64.h
new file mode 100644
index 0000000..2af64f4
--- /dev/null
+++ b/include/kernaux/arch/riscv64.h
@@ -0,0 +1,14 @@
+#ifndef KERNAUX_INCLUDED_ARCH_RISCV64
+#define KERNAUX_INCLUDED_ARCH_RISCV64
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/include/kernaux/asm/riscv64.h b/include/kernaux/asm/riscv64.h
new file mode 100644
index 0000000..4ddaf89
--- /dev/null
+++ b/include/kernaux/asm/riscv64.h
@@ -0,0 +1,14 @@
+#ifndef KERNAUX_INCLUDED_ASM_RISCV64
+#define KERNAUX_INCLUDED_ASM_RISCV64
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <kernaux/arch/riscv64.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/asm/riscv64.S b/src/asm/riscv64.S
new file mode 100644
index 0000000..c7cde56
--- /dev/null
+++ b/src/asm/riscv64.S
@@ -0,0 +1,3 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif