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https://github.com/drasko/codezero.git
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7a388f22b7
Previously python hex() would put an extra 'L' after printing out the value and this would be trimmed in readelf.py. Now it doesn't seem to do that so the lsd of the number was trimmed. This patch fixes that.
114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
/*
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* mm0. Pager for all tasks.
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#include <stdio.h>
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#include <init.h>
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#include <l4lib/arch/message.h>
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#include <l4lib/arch/syscalls.h>
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#include <l4lib/arch/syslib.h>
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#include <l4lib/kip.h>
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#include <l4lib/utcb.h>
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#include <l4lib/ipcdefs.h>
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#include <l4/api/thread.h>
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#include <l4/api/space.h>
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#include <l4/api/ipc.h>
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#include <shm.h>
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#include <task.h>
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#include <vm_area.h>
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#include <syscalls.h>
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/* FIXME:LOCKING:FIXME:LOCKING:FIXME:LOCKING
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* NOTE: For multithreadded MM0, not suprisingly, we need locking on
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* vmas, vm_files, and all global variables. Also at times, the per-task
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* lists of items (e.g. vmas) must be entirely locked. Pages already have
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* locking.
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*/
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void handle_requests(void)
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{
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/* Generic ipc data */
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u32 mr[MR_UNUSED_TOTAL];
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l4id_t sender;
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u32 tag;
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int err;
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printf("%s: Initiating ipc.\n", __TASKNAME__);
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if ((err = l4_receive(L4_ANYTHREAD)) < 0) {
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printf("%s: %s: IPC Error: %d. Quitting...\n", __TASKNAME__,
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__FUNCTION__, err);
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BUG();
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}
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/* Syslib conventional ipc data which uses first few mrs. */
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tag = l4_get_tag();
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sender = l4_get_sender();
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/* Read mrs not used by syslib */
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for (int i = 0; i < MR_UNUSED_TOTAL; i++)
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mr[i] = read_mr(i);
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switch(tag) {
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case L4_IPC_TAG_WAIT:
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/*
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* A thread that wants to sync with us would have
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* started here.
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*/
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printf("%s: Synced with waiting thread.\n", __TASKNAME__);
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break;
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case L4_IPC_TAG_PFAULT:
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/* Handle page fault. */
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page_fault_handler(sender, (fault_kdata_t *)&mr[0]);
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break;
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case L4_IPC_TAG_SHMGET: {
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struct sys_shmget_args *args = (struct sys_shmget_args *)&mr[0];
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sys_shmget(args->key, args->size, args->shmflg);
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break;
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}
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case L4_IPC_TAG_SHMAT: {
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struct sys_shmat_args *args = (struct sys_shmat_args *)&mr[0];
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sys_shmat(sender, args->shmid, args->shmaddr, args->shmflg);
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break;
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}
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case L4_IPC_TAG_SHMDT:
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sys_shmdt(sender, (void *)mr[0]);
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break;
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case L4_IPC_TAG_MMAP: {
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struct sys_mmap_args *args = (struct sys_mmap_args *)&mr[0];
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BUG(); /* FIXME: There are 8 arguments to ipc whereas there are 7 mrs available. Fix this by increasing MRs to 8 ??? */
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sys_mmap(sender, args->start, args->length, args->prot, args->flags, args->fd, args->offset);
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break;
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}
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case L4_IPC_TAG_MUNMAP: {
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/* TODO: Use arg struct instead */
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// sys_munmap(sender, (void *)mr[0], (int)mr[1]);
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break;
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}
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case L4_IPC_TAG_MSYNC: {
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/* TODO: Use arg struct instead */
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// sys_msync(sender, (void *)mr[0], (int)mr[1], (int)mr[2]);
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break;
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}
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default:
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printf("%s: Unrecognised ipc tag (%d)"
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"received. Ignoring.\n", __TASKNAME__, mr[MR_TAG]);
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}
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}
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void main(void)
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{
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/* Initialise the memory, server tasks, mmap and start them. */
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initialise();
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while (1) {
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handle_requests();
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}
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}
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