alpha 0.1.121

Reviewed-on: #18

docs/MANUAL.md

@@ -25,6 +25,9 @@ The recommended hardware to run PepperOS is the following:
 
 ## b. Features
 
+- Round robin preemptive scheduling
+- Coexistence of ring 0 and ring 3 processes
+
 ## II. Kernel architecture
 
 ### a. Boot process
@@ -37,4 +40,9 @@ The recommended hardware to run PepperOS is the following:
 
 ## III. Syscall table
 
-Not yet implemented.
+The syscall interface in the Pepper kernel uses the System V ABI convention for argument order.
+
+Name | Number (%rax) | arg0 (%rdi) | arg1 (%rsi) | arg2 (%rdx) |
+|---|---|---|---|---|
+| sys_write | 1 | unsigned int fd | const char* buf | size_t count | | 
+| sys_exit | 60 | int error_code | | | |

include/config.h

@@ -9,8 +9,8 @@
 
 /* version */
 #define PEPPEROS_VERSION_MAJOR "0"
-#define PEPPEROS_VERSION_MINOR "0"
-#define PEPPEROS_VERSION_PATCH "109"
+#define PEPPEROS_VERSION_MINOR "1"
+#define PEPPEROS_VERSION_PATCH "121"
 #define PEPPEROS_SPLASH \
 "\x1b[38;5;196m                                      \x1b[38;5;231m____  _____\r\n\x1b[0m"\
 "\x1b[38;5;196m    ____  ___  ____  ____  ___  _____\x1b[38;5;231m/ __ \\/ ___/\r\n\x1b[0m"\

src/kmain.c

@@ -130,6 +130,7 @@ void kmain()
 		file = boot_ctx.module->modules[1];
 		process_create_user(file, "pedicel");
 	}
+	process_create("kshell", (void*)pedicel_main, 0);
 	scheduler_init();
 
 	printf(PEPPEROS_SPLASH);

user/hello.S

@@ -1,7 +1,7 @@
 bits 64
 
 section .data
-    hi db "hi from userland :) we did it man", 0
+    hi db "hi from userland :) we did it man", 0x0A, 0x0d, 0
 
 section .text
 
@@ -9,7 +9,7 @@ hello:
     mov rax, 0x1        ;sys_write
     mov rdi, 0x1        ;stdout
     lea rsi, [rel hi]   ;char* buf
-    mov rdx, 33         ;count
+    mov rdx, 35         ;count
     int 0x80
 
 .end:

user/pedicel.S

@@ -1,7 +1,7 @@
 bits 64
 
 section .data
-hello db 0x0A, 0x0D, "User program 2 speaking", 0
+hello db 0x0A, 0x0D, "User program 2 speaking", 0x0A, 0x0D, 0
 
 section .text
 
@@ -9,7 +9,7 @@ _start:
     mov rax, 0x1    ;sys_write
     mov rdi, 0x1    ;stdout
     lea rsi, [rel hello]
-    mov rdx, 25     ;count
+    mov rdx, 27     ;count
     int 0x80
 
 ; when we are ready to have an os specific toolchain,