build system refresh

programs/rockterm/.gitignore

@@ -0,0 +1 @@
+rockterm

programs/rockterm/crt0.S

@@ -0,0 +1,21 @@
+.global _start
+.extern exit
+.section .text
+_start: 
+    xor %ebp, %ebp
+
+    mov (%esp), %eax
+    lea 4(%esp), %ebx
+    lea 8(%esp,%eax,4), %ecx
+
+    and $-16, %esp
+
+    push %ecx
+    push %ebx
+    push %eax
+
+    call main
+
+    push %eax
+    call exit
+

programs/rockterm/linker.ld

@@ -0,0 +1,31 @@
+ENTRY(_start)
+
+SECTIONS
+{
+    . = 0x40000000;
+
+    .text ALIGN(4K) :
+    {
+        /* Force the crt0.o entry code to be placed FIRST in memory */
+        KEEP(*crt0.o(.text))
+        *(.text .text.*)
+    }
+
+    .rodata ALIGN(4K) :
+    {
+        *(.rodata .rodata.*)
+    }
+
+    .data ALIGN(4K) :
+    {
+        *(.data .data.*)
+    }
+
+    .bss ALIGN(4K) :
+    {
+        _bss_start = .;
+        *(.bss .bss.*)
+        *(COMMON)
+        _bss_end = .;
+    }
+}

programs/rockterm/main.c

@@ -0,0 +1,74 @@
+#include <unistd.h>
+
+#include <sys/video.h>
+
+typedef struct {
+
+} font_t;
+
+void term_write_char(char c);
+void render_char_at(char c, int x, int y);
+
+int spawn_shell();
+
+int ptys;
+int ptym;
+
+void* fb;
+fb_info_t fb_info;
+
+int terminal_col = 0;
+int terminal_row = 0;
+
+font_t* terminal_font = NULL;
+
+int main(int argc, char *argv[]) {
+    (void)argc;
+    (void)argv;
+
+    int vga_fd = open("/dev/vga");
+    if (vga_fd == -1) return 1;
+
+    int kbd_fd = open("/dev/kbd");
+    if (kbd_fd == -1) return 1;
+
+    int res = ioctl(vga_fd, FBIOGET_INFO, &fb_info);
+    if (!res) {
+        return 1;
+    }
+
+    mmap(vga_fd);
+
+    // if (!spawn_shell()) {
+    //     return 1;
+    // }
+
+    return 0;
+}
+
+void render_char_at(char c, int x, int y) {
+    if (!terminal_font) return;
+}
+
+void term_write_char(char c) {
+
+}
+
+int spawn_shell() {
+    ptym = pty(&ptys);
+
+    if (fork() == 0) {
+        close(ptym);
+        dup2(ptys, 0);
+        dup2(0, 1);
+        dup2(0, 2);
+
+        if (!exec("/usr/bin/rocksh")) return 0;
+    }
+
+    close(ptys);
+    dup2(ptym, 0);
+    dup2(0, 1);
+    dup2(0, 2);
+    return 1;
+}

programs/rockterm/makefile

@@ -0,0 +1,29 @@
+CC = i686-elf-gcc
+LD = i686-elf-ld
+
+SYSROOT = ../sysroot
+USR_INCLUDE = $(SYSROOT)/usr/include
+USR_LIB		= $(SYSROOT)/usr/lib
+
+CFLAGS = -ffreestanding -O2 -Wall -Wextra -I$(USR_INCLUDE)
+LDFLAGS = -m elf_i386 -nostdlib
+
+TARGET = rockterm
+
+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 $(USR_LIB)/*
+	$(LD) $(LDFLAGS) -T linker.ld crt0.o main.o $(USR_LIB)/* -o $(TARGET)
+	cp $(TARGET) $(SYSROOT)/usr/bin
+
+clean:
+	rm -f *.o $(TARGET) compile_commands.json
+	rm -rf .cache
+
+.PHONY: all clean test