minix/servers/vm/i386/vm.c

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#define _SYSTEM 1
#include <minix/callnr.h>
#include <minix/com.h>
#include <minix/config.h>
#include <minix/const.h>
#include <minix/ds.h>
#include <minix/endpoint.h>
#include <minix/keymap.h>
#include <minix/minlib.h>
#include <minix/type.h>
#include <minix/ipc.h>
#include <minix/sysutil.h>
#include <minix/syslib.h>
#include <minix/bitmap.h>
#include <sys/mman.h>
#include <errno.h>
#include <env.h>
#include "../proto.h"
#include "../vm.h"
#include "../util.h"
#include "memory.h"
/*===========================================================================*
* arch_map2vir *
*===========================================================================*/
PUBLIC vir_bytes arch_map2vir(struct vmproc *vmp, vir_bytes addr)
{
vir_bytes textstart = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys);
vir_bytes datastart = CLICK2ABS(vmp->vm_arch.vm_seg[D].mem_phys);
/* Could be a text address. */
vm_assert(datastart <= addr || textstart <= addr);
return addr - datastart;
}
/*===========================================================================*
* arch_map2str *
*===========================================================================*/
PUBLIC char *arch_map2str(struct vmproc *vmp, vir_bytes addr)
{
static char bufstr[100];
vir_bytes textstart = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys);
vir_bytes textend = textstart + CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_len);
vir_bytes datastart = CLICK2ABS(vmp->vm_arch.vm_seg[D].mem_phys);
if(addr < textstart) {
sprintf(bufstr, "<lin:0x%lx>", addr);
} else if(addr < datastart) {
sprintf(bufstr, "0x%lx (codeseg)", addr - textstart);
} else {
sprintf(bufstr, "0x%lx (dataseg)", addr - datastart);
}
return bufstr;
}
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/*===========================================================================*
* arch_map2info *
*===========================================================================*/
PUBLIC vir_bytes arch_map2info(struct vmproc *vmp, vir_bytes addr, int *seg,
int *prot)
{
vir_bytes textstart = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys);
vir_bytes textend = textstart +
CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_len);
vir_bytes datastart = CLICK2ABS(vmp->vm_arch.vm_seg[D].mem_phys);
/* The protection to be returned here is that of the segment. */
if(addr < textstart) {
*seg = D;
*prot = PROT_READ | PROT_WRITE | PROT_EXEC;
return addr;
} else if(addr < datastart) {
*seg = T;
*prot = PROT_READ | PROT_EXEC;
return addr - textstart;
} else {
*seg = D;
if (textstart == textend) /* common I&D? */
*prot = PROT_READ | PROT_WRITE | PROT_EXEC;
else
*prot = PROT_READ | PROT_WRITE;
return addr - datastart;
}
}
/*===========================================================================*
* arch_addrok *
*===========================================================================*/
PUBLIC vir_bytes arch_addrok(struct vmproc *vmp, vir_bytes addr)
{
vir_bytes textstart = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys);
vir_bytes textend = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys +
vmp->vm_arch.vm_seg[T].mem_phys);
vir_bytes datastart = CLICK2ABS(vmp->vm_arch.vm_seg[D].mem_phys);
if(addr >= textstart && addr < textstart+textend)
return 1;
if(addr >= datastart && addr < VM_DATATOP)
return 1;
return 0;
}
/*===========================================================================*
* arch_vir2map *
*===========================================================================*/
PUBLIC vir_bytes arch_vir2map(struct vmproc *vmp, vir_bytes addr)
{
vir_bytes bottom = CLICK2ABS(vmp->vm_arch.vm_seg[D].mem_phys);
return addr + bottom;
}
/*===========================================================================*
* arch_vir2map_text *
*===========================================================================*/
PUBLIC vir_bytes arch_vir2map_text(struct vmproc *vmp, vir_bytes addr)
{
vir_bytes bottom = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys);
return addr + bottom;
}