keyboard skeleton, skeleton, rcs, etc

makefile

@@ -1,27 +1,32 @@
-cd: kernel fs
+cd: files grub
+	grub2-mkrescue out/fs -o out/cd.iso --product-name=portland --product-version=0.0.9
+
+grub: kernel
 	mkdir -p out/fs/boot/grub
 	mv out/kernel.elf out/fs/boot/
 	cp src/grub.cfg out/fs/boot/grub/
-	grub2-mkrescue out/fs -o out/cd.iso --product-name=portland --product-version=0.0.9
+
+files: out
+	mkdir -p out/fs
+	cp -r src/skel/* out/fs/
 
 kernel: obj out
+	nasm src/kernel/keyb.asm   -o obj/kkeyba.o  -f elf32
 	nasm src/kernel/serial.asm -o obj/kserial.o -f elf32
 	nasm src/kernel/stub.asm   -o obj/kstub.o   -f elf32
 	gcc -c src/kernel/files.c  -o obj/kfiles.o  -ffreestanding -nostdlib -m32
+	gcc -c src/kernel/keyb.c   -o obj/kkeybc.o  -ffreestanding -nostdlib -m32
 	gcc -c src/kernel/main.c   -o obj/kmain.o   -ffreestanding -nostdlib -m32
 	gcc -c src/kernel/mem.c    -o obj/kmem.o    -ffreestanding -nostdlib -m32
 	gcc -c src/kernel/proc.c   -o obj/kproc.o   -ffreestanding -nostdlib -m32
 	gcc -c src/kernel/vga.c    -o obj/kvga.o    -ffreestanding -nostdlib -m32
-	ld obj/kstub.o obj/kfiles.o obj/kmain.o obj/kmem.o obj/kproc.o obj/kserial.o obj/kvga.o \
+	ld obj/kkeyba.o obj/kstub.o obj/kfiles.o obj/kkeybc.o obj/kmain.o \
+		obj/kmem.o obj/kproc.o obj/kserial.o obj/kvga.o \
 		-o out/kernel.elf -T src/kernel/link.ld -s --orphan-handling=discard -melf_i386
 
-
 clean:
 	rm -r obj out
 
-fs: out
-	mkdir -p out/fs
-
 obj:
 	mkdir -p obj
 

src/kernel/files.c

@@ -20,14 +20,14 @@ OF THIS SOFTWARE.
 #include "files.h"
 
 uint16_t open_file(uint8_t *name) {
-  //TODO
+  return 0;//TODO
 }
 
 void close_file(uint16_t handle) {
   file_table[handle].first_sector = 0;
 }
 
-void read_file(uint16_t handle, uint32_t length, void *buffer) {
+uint32_t read_file(uint16_t handle, uint32_t length, void *buffer) {
   //TODO
 }
 
@@ -40,5 +40,16 @@ void seek_file(uint16_t handle, int32_t by) {
 }
 
 uint32_t get_size(uint16_t handle) {
-  //TODO
+  return 0;//TODO
+}
+
+uint32_t read_line_file(uint16_t handle, uint32_t max, void *buffer) {
+  uint8_t *i = (uint8_t *)buffer;
+  while (i < (uint8_t *)buffer + max) {
+    if (!read_file(handle, 1, i) || (*i == (uint8_t)'\n')) {
+      *i = 0;
+      return i - (uint8_t *)buffer;
+    }
+    ++i;
+  }
 }

src/kernel/files.h

@@ -32,9 +32,10 @@ struct file_info {
 struct file_info file_table[65536];
 uint16_t open_file(uint8_t *name);
 void close_file(uint16_t handle);
-void read_file(uint16_t handle, uint32_t length, void *buffer);
+uint32_t read_file(uint16_t handle, uint32_t length, void *buffer);
 void write_file(uint16_t handle, uint32_t length, void *buffer);
 void seek_file(uint16_t handle, int32_t by);
 uint32_t get_size(uint16_t handle);
+uint32_t read_line_file(uint16_t handle, uint32_t max, void *buffer);
 
 #endif

src/kernel/keyb.asm

@@ -0,0 +1,32 @@
+;Copyright 2019 Benji Dial
+
+;Permission to use, copy, modify, and/or distribute this
+;software for any purpose with or without fee is hereby
+;granted, provided that the above copyright notice and this
+;permission notice appear in all copies.
+
+;THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS
+;ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+;IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
+;EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+;INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+;RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+;ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+;ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+;OF THIS SOFTWARE.
+
+global get_key
+global get_char
+global get_line
+
+section .text
+get_key:;uint16_t get_key(void)
+  push ebp
+  mov ebp, esp
+
+  xor eax, eax
+
+  ;return in ax
+
+  leave
+  ret

src/kernel/keyb.c

@@ -0,0 +1,39 @@
+/*
+Copyright 2019 Benji Dial
+
+Permission to use, copy, modify, and/or distribute this
+software for any purpose with or without fee is hereby
+granted, provided that the above copyright notice and this
+permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS
+ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
+EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+OF THIS SOFTWARE.
+*/
+
+#include "serial.h"
+#include "vga.h"
+
+uint8_t get_char(bool echo) {
+  uint8_t ch = poll_port(COM2) ? read_byte(COM2) : 0;//TODO: from get_key
+  if (echo)
+    put_char(ch);
+  return ch;
+}
+
+uint32_t get_line(uint32_t max, uint8_t *buffer, bool echo) {
+  uint8_t *i = (uint8_t *)buffer;
+  while (i < (uint8_t *)buffer + max) {
+    if ((*i = get_char(echo)) == (uint8_t)'\n') {
+      *i = 0;
+      return i - (uint8_t *)buffer;
+    }
+    ++i;
+  }
+}

src/kernel/keyb.h

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 Benji Dial
+
+Permission to use, copy, modify, and/or distribute this
+software for any purpose with or without fee is hereby
+granted, provided that the above copyright notice and this
+permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS
+ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
+EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+OF THIS SOFTWARE.
+*/
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifndef KEYB_H
+#define KEYB_H
+
+uint16_t get_key(void);
+uint8_t get_char(bool echo);
+uint32_t get_line(uint32_t max, uint8_t *buffer, bool echo);
+
+#endif

src/kernel/main.c

@@ -80,23 +80,14 @@ enum error_codes {
   NO_BOOT_DEVICE = 0x00000000,
   NO_MMAP        = 0x00000001,
   INSUFF_MEMORY  = 0x00000002,
-  MMAP_TOO_SMALL = 0x00000003
+  MMAP_TOO_SMALL = 0x00000003,
+  MISSING_RC     = 0x00000004,
+  BAD_RC_LINE    = 0x00000005
 };
 
 struct tag_start *tag_pointer;
 
 uint32_t main(void) {
-  clear();
-
-  /*
-  uint32_t *debug_ptr = (uint32_t *)tag_pointer - 2;
-  uint32_t debug_size = *debug_ptr / 4;
-  for (uint32_t i = 0; i < debug_size; ++i) {
-    put_32_hex(debug_ptr[i]);
-    put_char(' ');
-  }
-  */
-
   put_sz("Multiboot info:\n");
   while (tag_pointer->type) {
     put_sz("  Tag type 0x");
@@ -231,12 +222,30 @@ uint32_t main(void) {
   put_32_hex(sizeof(struct file_info) * 65536);
   put_char('\n');
 
-  put_sz("\nWelcome to Portland version 0.0.9!\n");
-  while (1)
-    asm ("hlt");
+  uint8_t rc_buffer[4096];
+
+  uint16_t rc_handle = open_file("/cfg/init/once.rc");
+  if (!rc_handle)
+    return MISSING_RC;
+  while (read_line_file(rc_handle, 4095, (void *)rc_buffer))
+    if ((*rc_buffer != (uint8_t)'#') && !new_proc(rc_buffer))
+      return BAD_RC_LINE;
+  close_file(rc_handle);
+
+  rc_handle = open_file("/cfg/init/repeat.rc");
+  if (!rc_handle)
+    return MISSING_RC;
+  while (1) {
+    while (read_line_file(rc_handle, 4095, (void *)rc_buffer))
+      if ((*rc_buffer != (uint8_t)'#') && !new_proc(rc_buffer))
+        return BAD_RC_LINE;
+    seek_file(rc_handle, -0x80000000);
+    seek_file(rc_handle, -0x80000000);
+  }
 }
 
 void wrapped_main(void) {
+  clear();
   uint32_t error = main();
   set_color(0x47);
   clear();

src/kernel/proc.c

@@ -25,10 +25,10 @@ uint16_t new_proc(uint8_t *file) {
   uint16_t handle = open_file(file);
   if (handle)
     for (uint16_t id = 3; id; ++id)
-      if (!proc_table[id].memory_start) {
+      if (!proc_table[id].text) {
         uint32_t size = get_size(id);
         void *mem;
-        proc_table[id].memory_end = size + (proc_table[id].memory_start = allocate_block(size, id));
+        proc_table[id].text = size + (proc_table[id].text = allocate_block(size, id));
         read_file(handle, size, mem);
         close_file(handle);
         //Process file header and make new process
@@ -39,6 +39,14 @@ uint16_t new_proc(uint8_t *file) {
 }
 
 void end_proc(uint16_t id) {
-  deallocate_block(proc_table[id].memory_start);
-  proc_table[id].memory_start = 0;
+  if (id && proc_table[id].text) {
+    deallocate_block(proc_table[id].text);
+    if (proc_table[id].rodata)
+      deallocate_block(proc_table[id].rodata);
+    if (proc_table[id].data)
+      deallocate_block(proc_table[id].data);
+    if (proc_table[id].bss)
+      deallocate_block(proc_table[id].bss);
+    proc_table[id].text = 0;
+  }
 }

src/kernel/proc.h

@@ -23,8 +23,10 @@ OF THIS SOFTWARE.
 #define PROC_H
 
 struct proc_info {
-  void *memory_start;
-  void *memory_end;
+  void *text;
+  void *rodata;
+  void *data;
+  void *bss;
 };
 
 struct proc_info proc_table[65536];

src/kernel/serial.asm

@@ -17,7 +17,9 @@
 
 global send_byte
 global read_byte
+global poll_port
 
+section .text
 send_byte:;void send_byte(uint8_t value, uint8_t port)
   push ebp
   mov ebp, esp
@@ -77,5 +79,29 @@ read_byte:;uint8_t read_byte(uint8_t port)
   leave
   ret
 
+poll_port:;bool poll_port(uint8_t port)
+  push ebp
+  mov ebp, esp
+
+  xor eax, eax
+
+  xor ecx, ecx
+  mov cl, byte [ebp + 8];port
+
+  test cl, 0xfc
+  jnz .leave
+
+  shl cl, 1
+  mov dx, word [ecx + com_ports]
+
+  or dx, 5
+
+  in al, dx
+  and al, 0x01
+
+.leave:
+  leave
+  ret
+
 section .rodata
 com_ports dw 0x03f8, 0x02f8, 0x03e8, 0x02e8

src/kernel/serial.h

@@ -18,6 +18,7 @@ OF THIS SOFTWARE.
 */
 
 #include <stdint.h>
+#include <stdbool.h>
 
 #ifndef SERIAL_H
 #define SERIAL_H
@@ -31,5 +32,6 @@ enum serials {
 
 void send_byte(uint8_t value, uint8_t port);
 uint8_t read_byte(uint8_t port);
+bool poll_port(uint8_t port);
 
 #endif

src/skel/cfg/init/repeat.rc

@@ -0,0 +1 @@
+/exec/pshell.elf