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authorAlexis211 <alexis211@gmail.com>2009-09-02 12:36:52 +0200
committerAlexis211 <alexis211@gmail.com>2009-09-02 12:36:52 +0200
commitaa5aa4482314078c52f86226a1753511d3f4a4cb (patch)
tree63663f87a5375a957829d85f6d11d268cbdd1f4b /Source/Kernel/SyscallManager
parent8c9f3cc95987f2aee2771d96a0956241b6f96cb3 (diff)
downloadMelon-aa5aa4482314078c52f86226a1753511d3f4a4cb.tar.gz
Melon-aa5aa4482314078c52f86226a1753511d3f4a4cb.zip
Maybee some changes
Diffstat (limited to 'Source/Kernel/SyscallManager')
-rw-r--r--Source/Kernel/SyscallManager/IDT.ns.cpp15
-rw-r--r--Source/Kernel/SyscallManager/IDT.wtf.asm5
2 files changed, 15 insertions, 5 deletions
diff --git a/Source/Kernel/SyscallManager/IDT.ns.cpp b/Source/Kernel/SyscallManager/IDT.ns.cpp
index caa3b36..0684255 100644
--- a/Source/Kernel/SyscallManager/IDT.ns.cpp
+++ b/Source/Kernel/SyscallManager/IDT.ns.cpp
@@ -55,12 +55,14 @@ extern "C" void irq13();
extern "C" void irq14();
extern "C" void irq15();
-extern "C" void int64();
+extern "C" void int65(); //IRQ to request a task switch
+extern "C" void int66(); //IRQ to signal that thread ended
extern "C" void idt_flush(u32int);
extern "C" void interrupt_handler(registers_t regs) {
- bool doSwitch = (regs.int_no == 32 or regs.int_no == 64);
+ Task::currentThread->enterInterrupt(); //Do that so that whatever is called here can use waitIRQ
+ bool doSwitch = (regs.int_no == 32 or regs.int_no >= 65); //SYSCALLS >= 65 are task-managing-related
if (regs.int_no < 32) {
IDT::handleException(regs, regs.int_no);
} else if (regs.int_no < 48) {
@@ -70,7 +72,11 @@ extern "C" void interrupt_handler(registers_t regs) {
Dev::handleIRQ(regs, (regs.int_no - 32));
doSwitch = doSwitch or Task::IRQwakeup(regs.int_no - 32);
}
+ if (regs.int_no == 66) { //This syscall signals to kernel that thread ended.
+ Task::currentThread->finish(regs.eax);
+ }
if (doSwitch) Task::doSwitch();
+ Task::currentThread->exitInterrupt();
}
namespace IDT {
@@ -155,12 +161,13 @@ void init() {
setGate(46, (u32int)irq14, 0x08, 0x8E);
setGate(47, (u32int)irq15, 0x08, 0x8E);
- setGate(64, (u32int)int64, 0x08, 0x8E);
+ setGate(65, (u32int)int65, 0x08, 0x8E);
+ setGate(66, (u32int)int66, 0x08, 0x8E);
idt_flush((u32int)&idt_ptr);
}
-void handleException(registers_t regs, int no) {
+void handleException(registers_t regs, int no) { //TODO :: make exception handling work with task managment
asm volatile("cli;");
char* exceptions[] = {
"Division by zero", "Debug exception", "Non maskable interrupt",
diff --git a/Source/Kernel/SyscallManager/IDT.wtf.asm b/Source/Kernel/SyscallManager/IDT.wtf.asm
index 7980d13..b94612e 100644
--- a/Source/Kernel/SyscallManager/IDT.wtf.asm
+++ b/Source/Kernel/SyscallManager/IDT.wtf.asm
@@ -97,7 +97,10 @@ IRQ 13, 45
IRQ 14, 46
IRQ 15, 47
-SYSCALL 64 ; this syscall requests a task switch
+SYSCALL 64 ; this syscall is the one and only useful syscall. It does everything.
+; The next syscalls are task-managing-specific
+SYSCALL 65 ; this syscall requests a task switch
+SYSCALL 66 ; signals to kernel that thread has finished (retval in eax)
; ******************************************************************