elf sym loading

1 files changed, 0 insertions, 279 deletions

diff --git a/kernel/old/support.c b/kernel/old/support.c
deleted file mode 100644
index d48ce59..0000000
--- a/kernel/old/support.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
-** SCCS ID:	@(#)support.c	2.6	1/22/25
-**
-** @file	support.c
-**
-** @author  4003-506 class of 20003
-** @authors K. Reek, Warren R. Carithers
-**
-** Miscellaneous system initialization functions, interrupt
-** support routines, and data structures.
-*/
-
-#include <common.h>
-
-#include <support.h>
-#include <cio.h>
-#include <x86/arch.h>
-#include <x86/pic.h>
-#include <x86/ops.h>
-#include <bootstrap.h>
-#include <syscalls.h>
-
-/*
-** Global variables and local data types.
-*/
-
-/*
-** This is the table that contains pointers to the C-language ISR for
-** each interrupt.  These functions are called from the isr stub based
-** on the interrupt number.
-*/
-void ( *isr_table[ 256 ] )( int vector, int code );
-
-/*
-** Format of an IDT entry.
-*/
-typedef struct  {
-	short   offset_15_0;
-	short   segment_selector;
-	short   flags;
-	short   offset_31_16;
-} IDT_Gate;
-
-/*
-** LOCAL ROUTINES - not intended to be used outside this module.
-*/
-
-/**
-** unexpected_handler
-**
-** This routine catches interrupts that we do not expect to ever occur.
-** It handles them by (optionally) reporting them and then calling panic().
-**
-** @param vector   vector number for the interrupt that occurred
-** @param code     error code, or a dummy value
-**
-** Does not return.
-*/
-#ifdef RPT_INT_UNEXP
-/* add any header includes you need here */
-#endif
-static void unexpected_handler( int vector, int code ) {
-#ifdef RPT_INT_UNEXP
-	cio_printf( "\n** UNEXPECTED vector %d code %d\n", vector, code );
-#endif
-	panic( "Unexpected interrupt" );
-}
-
-/**
-** default_handler
-**
-** Default handler for interrupts we expect may occur but are not
-** handling (yet).  We just reset the PIC and return.
-**
-** @param vector   vector number for the interrupt that occurred
-** @param code     error code, or a dummy value
-*/
-static void default_handler( int vector, int code ) {
-#ifdef RPT_INT_UNEXP
-	cio_printf( "\n** vector %d code %d\n", vector, code );
-#endif
-	if( vector >= 0x20 && vector < 0x30 ) {
-		if( vector > 0x27 ) {
-			// must also ACK the secondary PIC
-			outb( PIC2_CMD, PIC_EOI );
-		}
-		outb( PIC1_CMD, PIC_EOI );
-	} else {
-		/*
-		** All the "expected" interrupts will be handled by the
-		** code above.  If we get down here, the isr table may
-		** have been corrupted.  Print a message and don't return.
-		*/
-		panic( "Unexpected \"expected\" interrupt!" );
-	}
-}
-
-/**
-** mystery_handler
-**
-** Default handler for the "mystery" interrupt that comes through vector
-** 0x27.  This is a non-repeatable interrupt whose source has not been
-** identified, but it appears to be the famous "spurious level 7 interrupt"
-** source.
-**
-** @param vector   vector number for the interrupt that occurred
-** @param code     error code, or a dummy value
-*/
-static void mystery_handler( int vector, int code ) {
-#if defined(RPT_INT_MYSTERY) || defined(RPT_INT_UNEXP)
-	cio_printf( "\nMystery interrupt!\nVector=0x%02x, code=%d\n",
-		  vector, code );
-#endif
-	outb( PIC1_CMD, PIC_EOI );
-}
-
-/**
-** init_pic
-**
-** Initialize the 8259 Programmable Interrupt Controller.
-*/
-static void init_pic( void ) {
-	/*
-	** ICW1: start the init sequence, update ICW4
-	*/
-	outb( PIC1_CMD, PIC_CW1_INIT | PIC_CW1_NEED4 );
-	outb( PIC2_CMD, PIC_CW1_INIT | PIC_CW1_NEED4 );
-
-	/*
-	** ICW2: primary offset of 0x20 in the IDT, secondary offset of 0x28
-	*/
-	outb( PIC1_DATA, PIC1_CW2_VECBASE );
-	outb( PIC2_DATA, PIC2_CW2_VECBASE );
-
-	/*
-	** ICW3: secondary attached to line 2 of primary, bit mask is 00000100
-	**   secondary id is 2
-	*/
-	outb( PIC1_DATA, PIC1_CW3_SEC_IRQ2 );
-	outb( PIC2_DATA, PIC2_CW3_SEC_ID );
-
-	/*
-	** ICW4: want 8086 mode, not 8080/8085 mode
-	*/
-	outb( PIC1_DATA, PIC_CW4_PM86 );
-	outb( PIC2_DATA, PIC_CW4_PM86 );
-
-	/*
-	** OCW1: allow interrupts on all lines
-	*/
-	outb( PIC1_DATA, PIC_MASK_NONE );
-	outb( PIC2_DATA, PIC_MASK_NONE );
-}
-
-/**
-** set_idt_entry
-**
-** Construct an entry in the IDT
-**
-** @param entry    the vector number of the interrupt
-** @param handler  ISR address to be put into the IDT entry
-**
-** Note: generally, the handler invoked from the IDT will be a "stub"
-** that calls the second-level C handler via the isr_table array.
-*/
-static void set_idt_entry( int entry, void ( *handler )( void ) ) {
-	IDT_Gate *g = (IDT_Gate *)IDT_ADDR + entry;
-
-	g->offset_15_0 = (int)handler & 0xffff;
-	g->segment_selector = 0x0010;
-	g->flags = IDT_PRESENT | IDT_DPL_0 | IDT_INT32_GATE;
-	g->offset_31_16 = (int)handler >> 16 & 0xffff;
-}
-
-/**
-** Name:    init_idt
-**
-** Initialize the Interrupt Descriptor Table (IDT).  This makes each of
-** the entries in the IDT point to the isr stub for that entry, and
-** installs a default handler in the handler table.  Temporary handlers
-** are then installed for those interrupts we may get before a real
-** handler is set up.
-*/
-static void init_idt( void ) {
-	int i;
-	extern  void    ( *isr_stub_table[ 256 ] )( void );
-
-	/*
-	** Make each IDT entry point to the stub for that vector.  Also
-	** make each entry in the ISR table point to the default handler.
-	*/
-	for ( i=0; i < 256; i++ ) {
-		set_idt_entry( i, isr_stub_table[ i ] );
-		install_isr( i, unexpected_handler );
-	}
-
-	/*
-	** Install the handlers for interrupts that have (or will have) a
-	** specific handler. Comments indicate which module init function
-	** will eventually install the "real" handler.
-	*/
-
-	install_isr( VEC_KBD, default_handler );         // cio_init()
-	install_isr( VEC_COM1, default_handler );        // sio_init()
-	install_isr( VEC_TIMER, default_handler );       // clk_init()
-	install_isr( VEC_SYSCALL, default_handler );     // sys_init()
-	install_isr( VEC_PAGE_FAULT, default_handler );  // vm_init()
-
-	install_isr( VEC_MYSTERY, mystery_handler );
-}
-
-/*
-** END OF LOCAL ROUTINES.
-**
-** Full documentation for globally-visible routines is in the corresponding
-** header file.
-*/
-
-/*
-** panic
-**
-** Called when we find an unrecoverable error.
-*/
-void panic( char *reason ) {
-	__asm__( "cli" );
-	cio_printf( "\nPANIC: %s\nHalting...", reason );
-	for(;;) {
-		;
-	}
-}
-
-/*
-** init_interrupts
-**
-** (Re)initilizes the interrupt system.
-*/
-void init_interrupts( void ) {
-	init_idt();
-	init_pic();
-}
-
-/*
-** install_isr
-**
-** Installs a second-level handler for a specific interrupt.
-*/
-void (*install_isr( int vector,
-		void (*handler)(int,int) ) ) ( int, int ) {
-
-	void ( *old_handler )( int vector, int code );
-
-	old_handler = isr_table[ vector ];
-	isr_table[ vector ] = handler;
-	return old_handler;
-}
-
-/*
-** Name:	delay
-**
-** Notes:  The parameter to the delay() function is ambiguous; it
-** purports to indicate a delay length, but that isn't really tied
-** to any real-world time measurement.
-**
-** On the original systems we used (dual 500MHz Intel P3 CPUs), each
-** "unit" was approximately one tenth of a second, so delay(10) would
-** delay for about one second.
-**
-** On the current machines (Intel Core i5-7500), delay(100) is about
-** 2.5 seconds, so each "unit" is roughly 0.025 seconds.
-**
-** Ultimately, just remember that DELAY VALUES ARE APPROXIMATE AT BEST.
-*/
-void delay( int length ) {
-
-	while( --length >= 0 ) {
-		for( int i = 0; i < 10000000; ++i )
-			;
-	}
-}