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dbalutadbaluta
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session 08: Initial commit
1 parent 6f7d78a commit ee74011

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lines changed

‎sesiune-08/code-sol/.gitignore

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/hello

‎sesiune-08/code-sol/Makefile

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CFLAGS = -Wall -g
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.PHONY: all clean
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all: hello
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clean:
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-rm -f *~
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-rm -f *.o
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-rm -f hello

‎sesiune-08/code-sol/hello.c

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/*
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* Sample C source code file
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*/
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#include <stdio.h>
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int main(void)
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{
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puts("Hello, World!");
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return 0;
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}

‎sesiune-08/code/.gitignore

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/hello

‎sesiune-08/slides/.gitignore

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/texfiles
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/*.pdf
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/code/*.tex
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/code/highlight.sty

‎sesiune-08/slides/Makefile

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BASENAME = sesiune-08
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include ../../metafiles/base.mk

‎sesiune-08/slides/code/Makefile

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TEXFILES = inittraps.tex paging.tex interrupt.tex idle.tex skbuf.tex skbuff.tex create.tex rcv.tex sock.tex
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ifeq (3, $(shell highlight --version | head -2 | tail -1 | rev | cut -d ' ' -f 1 | rev | cut -d '.' -f 1))
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HIGHLIGHT_OPTS = -O latex -l -f -t 8 -K tiny -S bash -c highlight.sty
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else
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HIGHLIGHT_OPTS = -L -l -f -t 8 -K tiny -S bash -c highlight.sty
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endif
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all: $(TEXFILES)
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create.tex: create.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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rcv.tex: rcv.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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sock.tex: sock.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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skbuff.tex: skbuff.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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skbuf.tex: skbuf.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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idle.tex: idle.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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interrupt.tex: interrupt.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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inittraps.tex: inittraps.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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paging.tex: paging.c
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highlight $(HIGHLIGHT_OPTS) -i $< -o $@
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.PHONY: clean
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clean:
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rm -f $(TEXFILES) highlight.sty *~

‎sesiune-08/slides/code/create.c

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static const struct net_proto_family my_family_ops = {
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.family = PF_MY,
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.create = my_create,
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.owner = THIS_MODULE,
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};
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‎sesiune-08/slides/code/highlight.css

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/* Style definition file generated by highlight 3.9, http://www.andre-simon.de/ */
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/* Highlighting theme: Kwrite Editor */
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body.hl { background-color:#e0eaee; }
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pre.hl { color:#000000; background-color:#e0eaee; font-size:10pt; font-family:'Courier New';}
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.hl.num { color:#b07e00; }
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.hl.esc { color:#ff00ff; }
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.hl.str { color:#bf0303; }
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.hl.pps { color:#818100; }
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.hl.slc { color:#838183; font-style:italic; }
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.hl.com { color:#838183; font-style:italic; }
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.hl.ppc { color:#008200; }
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.hl.opt { color:#000000; }
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.hl.lin { color:#555555; }
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.hl.kwa { color:#000000; font-weight:bold; }
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.hl.kwb { color:#0057ae; }
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.hl.kwc { color:#000000; font-weight:bold; }
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.hl.kwd { color:#010181; }
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‎sesiune-08/slides/code/idle.c

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void cpu_idle(void)
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{
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int cpu = smp_processor_id();
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current_thread_info()->status |= TS_POLLING;
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/* endless idle loop with no priority at all */
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while (1) {
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tick_nohz_stop_sched_tick();
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while (!need_resched()) {
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void (*idle)(void);
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check_pgt_cache();
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rmb();
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idle = pm_idle;
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if (rcu_pending(cpu))
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rcu_check_callbacks(cpu, 0);
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if (!idle)
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idle = default_idle;
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if (cpu_is_offline(cpu))
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play_dead();
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__get_cpu_var(irq_stat).idle_timestamp = jiffies;
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idle();
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}
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tick_nohz_restart_sched_tick();
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preempt_enable_no_resched();
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schedule();
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preempt_disable();
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}
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}

‎sesiune-08/slides/code/inittraps.c

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set_trap_gate(0,&divide_error);
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set_intr_gate(1,&debug);
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set_intr_gate(2,&nmi);
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set_system_intr_gate(3, &int3);
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set_system_gate(4,&overflow);
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set_trap_gate(5,&bounds);
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set_trap_gate(6,&invalid_op);
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set_trap_gate(7,&device_not_available);
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set_task_gate(8,GDT_ENTRY_DOUBLEFAULT_TSS);
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set_trap_gate(9,&coprocessor_segment_overrun);
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set_trap_gate(10,&invalid_TSS);
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set_trap_gate(11,&segment_not_present);
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set_trap_gate(12,&stack_segment);
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set_trap_gate(13,&general_protection);
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set_intr_gate(14,&page_fault);
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set_trap_gate(15,&spurious_interrupt_bug);
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set_trap_gate(16,&coprocessor_error);
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set_trap_gate(17,&alignment_check);

‎sesiune-08/slides/code/interrupt.c

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void enable_8259A_irq(unsigned int irq)
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{
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unsigned int mask = ~(1 << irq);
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unsigned long flags;
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spin_lock_irqsave(&i8259A_lock, flags);
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cached_irq_mask &= mask;
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if (irq & 8)
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outb(cached_slave_mask, PIC_SLAVE_IMR);
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else
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outb(cached_master_mask, PIC_MASTER_IMR);
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spin_unlock_irqrestore(&i8259A_lock, flags);
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}
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int i8259A_irq_pending(unsigned int irq)
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{
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unsigned int mask = 1<<irq;
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&i8259A_lock, flags);
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if (irq < 8)
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ret = inb(PIC_MASTER_CMD) & mask;
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else
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ret = inb(PIC_SLAVE_CMD) & (mask >> 8);
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spin_unlock_irqrestore(&i8259A_lock, flags);
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return ret;
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}

‎sesiune-08/slides/code/paging.c

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/*
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* Enable paging
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*/
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movl $pa(swapper_pg_dir),%eax
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/* set the page table pointer.. */
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movl %eax,%cr3
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movl %cr0,%eax
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orl $X86_CR0_PG,%eax
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/* ..and set paging (PG) bit */
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movl %eax,%cr0

‎sesiune-08/slides/code/rcv.c

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static struct packet_type my_packet_type __read_mostly = {
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.type = __constant_htons(MY_ETH),
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.func = my_rcv,
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};
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‎sesiune-08/slides/code/skbuf.c

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struct sk_buff {
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struct sk_buff *next;
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struct sk_buff *prev;
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struct sock *sk;
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ktime_t tstamp;
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struct net_device *dev;
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char cb[48];
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unsigned int len,
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data_len;
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__u16 mac_len,
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hdr_len;
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void (*destructor)(struct sk_buff *skb);
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sk_buff_data_t transport_header;
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sk_buff_data_t network_header;
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sk_buff_data_t mac_header;
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sk_buff_data_t tail;
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sk_buff_data_t end;
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unsigned char *head,
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*data;
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unsigned int truesize;
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atomic_t users;

‎sesiune-08/slides/code/skbuff.c

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/* reserve head room */
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void skb_reserve(struct sk_buff *skb, int len);
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/* add data to the end */
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unsigned char *skb_put(struct sk_buff *skb, unsigned int len);
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/* add data to the top */
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unsigned char *skb_push(struct sk_buff *skb, unsigned int len);
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/* discard data at the top */
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unsigned char *skb_pull(struct sk_buff *skb, unsigned int len);
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/* discard data at the end */
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unsigned char *skb_trim(struct sk_buff *skb, unsigned int len);

‎sesiune-08/slides/code/sock.c

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static struct proto my_proto = {
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.name = MY_PROTO_NAME,
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.owner = THIS_MODULE,
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.obj_size = sizeof(struct my_sock),
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};
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‎sesiune-08/slides/code/user-stat.txt

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root@profus:~# id razvan.deaconescu
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uid=1059(razvan.deaconescu) gid=1010(prof) groups=1010(prof)
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root@profus:~# finger razvan.deaconescu
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Login: razvan.deaconescu Name: Razvan DEACONESCU
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Directory: /home/prof/razvan.deaconescu Shell: /bin/bash
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Last login Fri Oct 2 21:03 (EEST) on pts/1 from dhcp-227.cs.pub.ro
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Mail forwarded to | /usr/bin/procmail
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root@profus:~# w
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17:38:09 up 14 days, 4:01, 1 user, load average: 1.28, 2.28, 1.53
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USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
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root pts/0 10.38.248.154 17:34 0.00s 0.03s 0.01s w
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root@profus:~# who
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root pts/0 Oct 8 17:34 (10.38.248.154)
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root@profus:~# last -3
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root pts/0 10.38.248.154 Thu Oct 8 17:34 still logged in
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elena.ap pts/0 89.36.46.156 Thu Oct 8 00:10 - 01:02 (00:51)
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emil.slu pts/1 82.76.28.29 Wed Oct 7 19:00 - 19:22 (00:22)
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koala:~# groups www-data
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www-data tracker projects

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