728f0f0c49
* Userspace change to use the new kernel calls - _taskcall(SYSTASK...) changed to _kernel_call(...) - int 32 reused for the kernel calls - _do_kernel_call() to make the trap to kernel - kernel_call() to make the actuall kernel call from C using _do_kernel_call() - unlike ipc call the kernel call always succeeds as kernel is always available, however, kernel may return an error * Kernel side implementation of kernel calls - the SYSTEm task does not run, only the proc table entry is preserved - every data_copy(SYSTEM is no data_copy(KERNEL - "locking" is an empty operation now as everything runs in kernel - sys_task() is replaced by kernel_call() which copies the message into kernel, dispatches the call to its handler and finishes by either copying the results back to userspace (if need be) or by suspending the process because of VM - suspended processes are later made runnable once the memory issue is resolved, picked up by the scheduler and only at this time the call is resumed (in fact restarted) which does not need to copy the message from userspace as the message is already saved in the process structure. - no ned for the vmrestart queue, the scheduler will restart the system calls - no special case in do_vmctl(), all requests remove the RTS_VMREQUEST flag
147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/* The kernel call that is implemented in this file:
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* m_type: SYS_CPROFILE
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*
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* The parameters for this kernel call are:
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* m7_i1: PROF_ACTION (get/reset profiling data)
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* m7_i2: PROF_MEM_SIZE (available memory for data)
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* m7_i4: PROF_ENDPT (endpoint of caller)
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* m7_p1: PROF_CTL_PTR (location of info struct)
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* m7_p2: PROF_MEM_PTR (location of memory for data)
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*
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* Changes:
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* 14 Aug, 2006 Created (Rogier Meurs)
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*/
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#include "../system.h"
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#include <string.h>
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/*===========================================================================*
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* do_cprofile *
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*===========================================================================*/
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PUBLIC int do_cprofile(struct proc * caller, message * m_ptr)
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{
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int proc_nr, i;
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phys_bytes len;
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vir_bytes vir_dst;
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switch (m_ptr->PROF_ACTION) {
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case PROF_RESET:
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/* Reset profiling tables. */
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cprof_ctl_inst.reset = 1;
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kprintf("CPROFILE notice: resetting tables:");
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for (i=0; i<cprof_procs_no; i++) {
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kprintf(" %s", cprof_proc_info[i].name);
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/* Test whether proc still alive. */
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if (!isokendpt(cprof_proc_info[i].endpt, &proc_nr)) {
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kprintf("endpt not valid %u (%s)\n",
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cprof_proc_info[i].endpt, cprof_proc_info[i].name);
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continue;
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}
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/* Set reset flag. */
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data_copy(KERNEL, (vir_bytes) &cprof_ctl_inst.reset,
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cprof_proc_info[i].endpt, cprof_proc_info[i].ctl_v,
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sizeof(cprof_ctl_inst.reset));
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}
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kprintf("\n");
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return OK;
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case PROF_GET:
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/* Get profiling data.
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*
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* Calculate physical addresses of user pointers. Copy to user
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* program the info struct. Copy to user program the profiling
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* tables of the profiled processes.
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*/
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if(!isokendpt(m_ptr->PROF_ENDPT, &proc_nr))
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return EINVAL;
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cprof_mem_size = m_ptr->PROF_MEM_SIZE;
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kprintf("CPROFILE notice: getting tables:");
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/* Copy control structs of profiled processes to calculate total
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* nr of bytes to be copied to user program and find out if any
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* errors happened. */
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cprof_info.mem_used = 0;
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cprof_info.err = 0;
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for (i=0; i<cprof_procs_no; i++) {
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kprintf(" %s", cprof_proc_info[i].name);
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/* Test whether proc still alive. */
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if (!isokendpt(cprof_proc_info[i].endpt, &proc_nr)) {
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kprintf("endpt not valid %u (%s)\n",
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cprof_proc_info[i].endpt, cprof_proc_info[i].name);
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continue;
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}
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/* Copy control struct from proc to local variable. */
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data_copy(cprof_proc_info[i].endpt, cprof_proc_info[i].ctl_v,
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KERNEL, (vir_bytes) &cprof_ctl_inst,
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sizeof(cprof_ctl_inst));
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/* Calculate memory used. */
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cprof_proc_info[i].slots_used = cprof_ctl_inst.slots_used;
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cprof_info.mem_used += CPROF_PROCNAME_LEN;
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cprof_info.mem_used += sizeof(cprof_proc_info_inst.slots_used);
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cprof_info.mem_used += cprof_proc_info[i].slots_used *
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sizeof(cprof_tbl_inst);
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/* Collect errors. */
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cprof_info.err |= cprof_ctl_inst.err;
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}
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kprintf("\n");
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/* Do we have the space available? */
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if (cprof_mem_size < cprof_info.mem_used) cprof_info.mem_used = -1;
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/* Copy the info struct to the user process. */
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data_copy(KERNEL, (vir_bytes) &cprof_info,
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m_ptr->PROF_ENDPT, (vir_bytes) m_ptr->PROF_CTL_PTR,
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sizeof(cprof_info));
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/* If there is no space or errors occurred, don't bother copying. */
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if (cprof_info.mem_used == -1 || cprof_info.err) return OK;
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/* For each profiled process, copy its name, slots_used and profiling
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* table to the user process. */
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vir_dst = (vir_bytes) m_ptr->PROF_MEM_PTR;
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for (i=0; i<cprof_procs_no; i++) {
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len = (phys_bytes) strlen(cprof_proc_info[i].name);
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data_copy(KERNEL, (vir_bytes) cprof_proc_info[i].name,
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m_ptr->PROF_ENDPT, vir_dst, len);
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vir_dst += CPROF_PROCNAME_LEN;
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len = (phys_bytes) sizeof(cprof_ctl_inst.slots_used);
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data_copy(cprof_proc_info[i].endpt,
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cprof_proc_info[i].ctl_v + sizeof(cprof_ctl_inst.reset),
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m_ptr->PROF_ENDPT, vir_dst, len);
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vir_dst += len;
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len = (phys_bytes)
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(sizeof(cprof_tbl_inst) * cprof_proc_info[i].slots_used);
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data_copy(cprof_proc_info[i].endpt, cprof_proc_info[i].buf_v,
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m_ptr->PROF_ENDPT, vir_dst, len);
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vir_dst += len;
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}
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return OK;
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default:
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return EINVAL;
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}
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}
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