Subversion Repositories HelenOS

#include <arch.h>

static void udebug_receive_mem_read(call_t *call)

{

    unative_t uspace_dst;

    void *uspace_ptr;

    unsigned size;

    void *buffer;

    int rc;

    klog_printf("debug_mem_read()");

    uspace_dst = IPC_GET_ARG2(call->data);

    uspace_ptr = (void *)IPC_GET_ARG3(call->data);

    size = IPC_GET_ARG4(call->data);

    buffer = malloc(size, 0); // ???

    klog_printf("debug_mem_read: src=%u, size=%u", uspace_ptr, size);

    /* NOTE: this is not strictly from a syscall... but that shouldn't

     * be a problem */

    rc = copy_from_uspace(buffer, uspace_ptr, size);

    if (rc) {

        IPC_SET_RETVAL(call->data, rc);

        return;

    }

    klog_printf("first word: %u", *((unative_t *)buffer));

    IPC_SET_RETVAL(call->data, 0);

    /* Hack: ARG1=dest, ARG2=size as in IPC_M_DATA_READ so that

       same code in process_answer() can be used

       (no way to distinguish method in answer) */

    IPC_SET_ARG1(call->data, uspace_dst);

    IPC_SET_ARG2(call->data, size);

    call->buffer = buffer;

    ipc_answer(&TASK->kernel_box, call);

}

/**

 * Handle a debug call received on the kernel answerbox.

 *

 * This is called by the kbox servicing thread.

 */

void udebug_call_receive(call_t *call)

{

    int debug_method;

    debug_method = IPC_GET_ARG1(call->data);

    switch (debug_method) {

    case UDEBUG_M_MEM_READ:

        udebug_receive_mem_read(call);

        break;

    }

}