🎨 将shell独立成单独的app

user/apps/Makefile

@@ -0,0 +1,10 @@
+
+user_apps_sub_dirs=shell
+
+all:
+	@list='$(user_apps_sub_dirs)'; for subdir in $$list; do \
+    		echo "make all in $$subdir";\
+    		cd $$subdir;\
+    		$(MAKE) all CFLAGS="$(CFLAGS) -I $(shell pwd)";\
+    		cd ..;\
+	done

user/apps/shell/Makefile

@@ -0,0 +1,4 @@
+all: shell.o
+
+shell.o: shell.c
+	gcc $(CFLAGS) -c shell.c  -o shell.o

user/apps/shell/shell.c

@@ -0,0 +1,83 @@
+#include <libc/unistd.h>
+#include <libc/stdio.h>
+#include <libc/fcntl.h>
+#include <libc/stdlib.h>
+#include <libKeyboard/keyboard.h>
+int main()
+{
+    char string[] = "/333.txt";
+    uint8_t buf[128] = {0};
+    char tips_str[] = "The first application 'init.bin' started successfully!\n";
+    put_string(tips_str, COLOR_GREEN, COLOR_BLACK);
+
+    printf("test printf: %s size: %d\n", string, sizeof(string));
+
+    char kb_file_path[] = "/dev/keyboard.dev";
+    int kb_fd = open(kb_file_path, 0);
+    printf("keyboard fd = %d\n", kb_fd);
+    while (true)
+    {
+        int key = keyboard_analyze_keycode(kb_fd);
+        if(key)
+            printf("%c", (char)key);
+    }
+    
+    
+    /*
+    int fd = open(string, 0);
+    printf("fd=%d\n", fd);
+
+    read(fd, buf, 128);
+
+    put_string(buf, COLOR_ORANGE, COLOR_BLACK);
+
+    lseek(fd, 0, SEEK_SET);
+    write(fd, tips_str, sizeof(tips_str)-1);
+    lseek(fd, 0, SEEK_SET);
+
+    // 由于暂时没有实现用户态的memset，因此先手动清零
+    for(int i=0;i<128;++i)
+        buf[i] = 0;
+
+    read(fd, buf, 128);
+    put_string(buf, COLOR_YELLOW, COLOR_BLACK);
+    close(fd);
+    
+
+    void *ptr[256] = {0};
+    for (int k = 0; k < 2; ++k)
+    {
+        printf("try to malloc 256*1M=256MB\n");
+        uint64_t js = 0;
+        for (int i = 0; i < 256; ++i)
+        {
+            ptr[i] = malloc(1024 * 1024);
+            js += *(uint64_t *)((uint64_t)(ptr[i]) - sizeof(uint64_t));
+            // if (*(uint64_t *)((uint64_t)(ptr[i]) - sizeof(uint64_t)) > 0x4008)
+            //     printf("[%ld] start_addr = %#018lx, len = %#010lx\n", i, (uint64_t)(ptr[i]) - 8, *(uint64_t *)((uint64_t)(ptr[i]) - sizeof(uint64_t)));
+        }
+
+        // printf("ptr[0]->len=%lld\n", *(uint64_t *)((uint64_t)ptr[0] - sizeof(uint64_t)));
+        // printf("ptr[1]->len=%lld\n", *(uint64_t *)((uint64_t)ptr[1] - sizeof(uint64_t)));
+        //  printf("ptr[24]->len=%lld\n", *(uint64_t*)((uint64_t)ptr[24] - sizeof(uint64_t)));
+        printf("alloc done. total used: %lld bytes\n", js);
+        printf("try to free...\n");
+        for (int i = 0; i < 256; ++i)
+        {
+            free(ptr[i]);
+        }
+        printf("free done!\n");
+    }
+    */
+    
+
+    // *p = 'a';
+    /*
+    pid_t p = fork();
+    if(p == 0)
+        put_string("subproc\n", COLOR_PURPLE, COLOR_BLACK);
+    else put_string("parent proc\n", COLOR_ORANGE, COLOR_BLACK);
+*/
+    while (1)
+        ;
+}

user/apps/shell/shell.lds

@@ -0,0 +1,50 @@
+
+OUTPUT_FORMAT("elf64-x86-64","elf64-x86-64","elf64-x86-64")
+OUTPUT_ARCH(i386:x86-64)
+ENTRY(main)
+
+SECTIONS
+{
+
+	. = 0x800000;
+	
+	
+	.text :
+	{
+		_text = .;
+		
+		init.o(.text)
+		
+		_etext = .;
+	}
+	. = ALIGN(8);
+	
+	.data :
+	{
+		_data = .;
+		*(.data)
+		
+		_edata = .;
+	}
+
+
+	rodata_start_pa = .;
+	.rodata :
+	{
+		_rodata = .;	
+		*(.rodata)
+		_erodata = .;
+	}
+
+	
+	.bss :
+	{
+		_bss = .;
+		*(.bss)
+		_ebss = .;
+	}
+
+	_end = .;
+
+
+}