removed pdclib, strange things were happening..., user shell kinda works now

programs/main.c

@@ -1,6 +0,0 @@
-#include <stdio.h>
-
-int main(int argc, char *argv[]) {
-    printf("RockOS booting...\n");
-    return 0;
-}

programs/makefile

@@ -1,24 +0,0 @@
-CC = i686-elf-gcc
-LD = i686-elf-ld
-
-CFLAGS = -ffreestanding -O2 -Wall -Wextra -ffunction-sections -fdata-sections -I../rocklibc/include
-LDFLAGS = -m elf_i386 -nostdlib --gc-sections
-
-TARGET = origin.elf
-
-all: $(TARGET)
-
-crt0.o: crt0.S
-	$(CC) $(CFLAGS) -c crt0.S -o crt0.o
-
-main.o: main.c
-	$(CC) $(CFLAGS) -c main.c -o main.o
-
-$(TARGET): crt0.o main.o ../rocklibc/rlibc.a
-	$(LD) $(LDFLAGS) -T linker.ld crt0.o main.o ../rocklibc/rlibc.a $(shell $(CC) -print-libgcc-file-name) -o $(TARGET)
-	cp $(TARGET) ../initrd
-
-clean:
-	rm -f *.o $(TARGET)
-
-.PHONY: all clean test

programs/rocksh/compile_commands.json

@@ -0,0 +1,36 @@
+[
+  {
+    "arguments": [
+      "/home/slinky/opt/cross/bin/i686-elf-gcc",
+      "-ffreestanding",
+      "-O2",
+      "-Wall",
+      "-Wextra",
+      "-I../../rocklibc/include",
+      "-c",
+      "-o",
+      "crt0.o",
+      "crt0.S"
+    ],
+    "directory": "/home/slinky/source/RockOS/programs/rocksh",
+    "file": "/home/slinky/source/RockOS/programs/rocksh/crt0.S",
+    "output": "/home/slinky/source/RockOS/programs/rocksh/crt0.o"
+  },
+  {
+    "arguments": [
+      "/home/slinky/opt/cross/bin/i686-elf-gcc",
+      "-ffreestanding",
+      "-O2",
+      "-Wall",
+      "-Wextra",
+      "-I../../rocklibc/include",
+      "-c",
+      "-o",
+      "main.o",
+      "main.c"
+    ],
+    "directory": "/home/slinky/source/RockOS/programs/rocksh",
+    "file": "/home/slinky/source/RockOS/programs/rocksh/main.c",
+    "output": "/home/slinky/source/RockOS/programs/rocksh/main.o"
+  }
+]

programs/rocksh/crt0.S

@@ -1,14 +1,14 @@
 .global _start
-
+.extern exit
 .section .text
 _start: 
     xor %ebp, %ebp
-    push %ebp
-    mov %esp, %ebp
 
     mov (%esp), %eax
     lea 4(%esp), %ebx
-    lea 8(%esp, %eax, 4), %ecx
+    lea 8(%esp,%eax,4), %ecx
+
+    and $-16, %esp
 
     push %ecx
     push %ebx
@@ -17,6 +17,5 @@ _start:
     call main
 
     push %eax
-1: jmp 1b  
     call exit
 

programs/rocksh/main.c

@@ -0,0 +1,46 @@
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+
+const char* shell_prompt = "rocksh> ";
+
+static void process_cmd(const char* cmd) {
+    size_t cmd_len = strlen(cmd);
+    if (cmd_len < 1) {
+        return;
+    }
+
+    if (strcmp(cmd, "exit") == 0) {
+        printf("bye!\n");
+        exit(0);
+    }
+
+    printf("command not recognized: %s\n", cmd);
+}
+
+int main(int argc, char *argv[]) {
+    (void)argc;
+    (void)argv;
+
+    char cmd[128];
+    size_t p = 0;
+    
+    printf("%s", shell_prompt);
+
+    while (1) {
+        char c = getchar();
+        printf("%c", c);
+        if (c != '\n') {
+            cmd[p++] = c;
+            continue;
+        }
+
+        cmd[p] = 0;
+        process_cmd(cmd);
+        memset(cmd, 0, 128);
+        p = 0;
+        printf("%s", shell_prompt);
+    }
+    
+    return 0;
+}

programs/rocksh/makefile

@@ -0,0 +1,23 @@
+CC = i686-elf-gcc
+LD = i686-elf-ld
+
+CFLAGS = -ffreestanding -O2 -Wall -Wextra -I../../rocklibc/include
+LDFLAGS = -m elf_i386 -nostdlib
+
+TARGET = rocksh.elf
+
+all: $(TARGET)
+
+crt0.o: crt0.S
+	$(CC) $(CFLAGS) -c crt0.S -o crt0.o
+
+main.o: main.c
+	$(CC) $(CFLAGS) -c main.c -o main.o
+
+$(TARGET): crt0.o main.o ../lib/rlibc.a
+	$(LD) $(LDFLAGS) -T linker.ld crt0.o main.o ../lib/rlibc.a -o $(TARGET)
+
+clean:
+	rm -f *.o $(TARGET)
+
+.PHONY: all clean test