32fbbd370c
shared with the kernel, mapped into kernel address space; kernel is notified of its location. kernel segment size is increased to make it fit. - map in kernel and other processes that don't have their own page table using single 4MB (global) mapping. - new sanity check facility: objects that are allocated with the slab allocator are, when running with sanity checking on, marked readonly until they are explicitly unlocked using the USE() macro. - another sanity check facility: collect all uses of memory and see if they don't overlap with (a) eachother and (b) free memory - own munmap() and munmap_text() functions. - exec() recovers from out-of-memory conditions properly now; this solves some weird exec() behaviour - chew off memory from the same side of the chunk as where we start scanning, solving some memory fragmentation issues - use avl trees for freelist and phys_ranges in regions - implement most useful part of munmap() - remap() stuff is GQ's for shared memory
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
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#define _SYSTEM 1
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/ds.h>
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#include <minix/endpoint.h>
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#include <minix/keymap.h>
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#include <minix/minlib.h>
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/bitmap.h>
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#include <sys/sigcontext.h>
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#include <errno.h>
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#include <env.h>
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#include "glo.h"
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#include "vm.h"
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#include "proto.h"
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#include "util.h"
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#define DATA_CHANGED 1 /* flag value when data segment size changed */
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#define STACK_CHANGED 2 /* flag value when stack size changed */
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/*===========================================================================*
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* do_push_sig *
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*===========================================================================*/
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PUBLIC int do_push_sig(message *msg)
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{
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int r, n;
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endpoint_t ep;
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vir_bytes sp;
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struct vmproc *vmp;
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ep = msg->VMPS_ENDPOINT;
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if((r=vm_isokendpt(ep, &n)) != OK) {
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printf("VM: bogus endpoint %d from %d\n", ep, msg->m_source);
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return r;
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}
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vmp = &vmproc[n];
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if ((r=get_stack_ptr(ep, &sp)) != OK)
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vm_panic("couldn't get new stack pointer (for sig)",r);
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/* Save old SP for caller */
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msg->VMPS_OLD_SP = (char *) sp;
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/* Make room for the sigcontext and sigframe struct. */
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sp -= sizeof(struct sigcontext)
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+ 3 * sizeof(char *) + 2 * sizeof(int);
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if ((r=adjust(vmp, vmp->vm_arch.vm_seg[D].mem_len, sp)) != OK) {
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printf("VM: do_push_sig: adjust() failed: %d\n", r);
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return r;
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}
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return OK;
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}
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