A quick prototype for getcwd

test/common_amd64/functions/getcwd.c

@@ -0,0 +1,40 @@
+/* Copyright (C) 2020 Jeremiah Orians
+ * This file is part of M2-Planet.
+ *
+ * M2-Planet is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * M2-Planet 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include<stdlib.h>
+//CONSTANT PATH_MAX 4096
+#define PATH_MAX 4096
+
+char* getcwd(char* buf, size_t size)
+{
+	asm("LOAD_EFFECTIVE_ADDRESS_rdi %16"
+	"LOAD_INTEGER_rdi"
+	"LOAD_EFFECTIVE_ADDRESS_rsi %8"
+	"LOAD_INTEGER_rsi"
+	"LOAD_IMMEDIATE_rax %79"
+	"SYSCALL");
+}
+
+char* getwd(char* buf)
+{
+	return getcwd(buf, PATH_MAX);
+}
+
+char* get_current_dir_name()
+{
+	return getcwd(malloc(PATH_MAX), PATH_MAX);
+}

test/common_armv7l/functions/getcwd.c

@@ -0,0 +1,40 @@
+/* Copyright (C) 2020 Jeremiah Orians
+ * This file is part of M2-Planet.
+ *
+ * M2-Planet is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * M2-Planet 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include<stdlib.h>
+//CONSTANT PATH_MAX 4096
+#define PATH_MAX 4096
+
+char* getcwd(char* buf, size_t size)
+{
+	asm("!4 R0 SUB R12 ARITH_ALWAYS"
+	    "!0 R0 LOAD32 R0 MEMORY"
+	    "!8 R1 SUB R12 ARITH_ALWAYS"
+	    "!0 R1 LOAD32 R1 MEMORY"
+	    "!183 R7 LOADI8_ALWAYS"
+	    "SYSCALL_ALWAYS");
+}
+
+char* getwd(char* buf)
+{
+	return getcwd(buf, PATH_MAX);
+}
+
+char* get_current_dir_name()
+{
+	return getcwd(malloc(PATH_MAX), PATH_MAX);
+}

test/common_knight/functions/getcwd.c

@@ -0,0 +1,37 @@
+/* Copyright (C) 2020 Jeremiah Orians
+ * This file is part of M2-Planet.
+ *
+ * M2-Planet is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * M2-Planet 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include<stdlib.h>
+//CONSTANT PATH_MAX 4096
+#define PATH_MAX 4096
+
+char* getcwd(char* buf, size_t size)
+{
+	asm("LOAD R0 R14 0"
+	    "LOAD R1 R14 4"
+	    "GETCWD");
+}
+
+char* getwd(char* buf)
+{
+	return getcwd(buf, PATH_MAX);
+}
+
+char* get_current_dir_name()
+{
+	return getcwd(malloc(PATH_MAX), PATH_MAX);
+}

test/common_knight/knight_defs.M1

@@ -245,6 +245,7 @@ DEFINE FSEEK 42000008
 DEFINE ACCESS 42000015
 DEFINE EXIT 4200003C
 DEFINE UNAME 4200003F
+DEFINE GETCWD 4200004F
 DEFINE CHDIR 42000050
 DEFINE FCHDIR 42000051
 DEFINE CHMOD 4200005A

test/common_x86/functions/getcwd.c

@@ -0,0 +1,40 @@
+/* Copyright (C) 2020 Jeremiah Orians
+ * This file is part of M2-Planet.
+ *
+ * M2-Planet is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * M2-Planet 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with M2-Planet.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include<stdlib.h>
+//CONSTANT PATH_MAX 4096
+#define PATH_MAX 4096
+
+char* getcwd(char* buf, size_t size)
+{
+	asm("LOAD_EFFECTIVE_ADDRESS_ebx %8"
+	"LOAD_INTEGER_ebx"
+	"LOAD_EFFECTIVE_ADDRESS_ecx %4"
+	"LOAD_INTEGER_ecx"
+	"LOAD_IMMEDIATE_eax %183"
+	"INT_80");
+}
+
+char* getwd(char* buf)
+{
+	return getcwd(buf, PATH_MAX);
+}
+
+char* get_current_dir_name()
+{
+	return getcwd(malloc(PATH_MAX), PATH_MAX);
+}