should work for sun4 and sun4c
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deraadt
parent
dd831dd13a
commit
fdf894abcd
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@ -67,21 +67,37 @@ static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93";
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#define NPGBANK 16 /* 2^4 pages per bank (64K / bank) */
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#define BSHIFT 4 /* log2(NPGBANK) */
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#define BOFFSET (NPGBANK - 1)
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#define BTSIZE (MAXMEM / NBPG / NPGBANK)
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#define BTSIZE (MAXMEM / 4096 / NPGBANK)
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#define HWTOSW(pmap_stod, pg) (pmap_stod[(pg) >> BSHIFT] | ((pg) & BOFFSET))
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struct vmstate {
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pmeg_t segmap[NKSEG];
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int pmeg[NPMEG][NPTESG];
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int *pmeg;
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int pmap_stod[BTSIZE]; /* dense to sparse */
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};
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static int cputyp;
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static int pgshift, nptesg;
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static void
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getpgshift(kd)
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kvm_t *kd;
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{
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for (pgshift = 12; (1 << pgshift) != kd->nbpg; pgshift++)
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;
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nptesg = NBPSG / kd->nbpg;
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}
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void
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_kvm_freevtop(kd)
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kvm_t *kd;
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{
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if (kd->vmst != 0)
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if (kd->vmst != 0) {
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if (kd->vmst->pmeg != 0)
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free(kd->vmst->pmeg);
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free(kd->vmst);
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}
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}
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int
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@ -92,11 +108,17 @@ _kvm_initvtop(kd)
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register int off;
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register struct vmstate *vm;
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struct stat st;
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struct nlist nlist[2];
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struct nlist nlist[3];
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if (pgshift == 0)
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getpgshift(kd);
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vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
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if (vm == 0)
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return (-1);
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vm->pmeg = (int *)_kvm_malloc(kd, NPMEG * nptesg * sizeof(int));
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if (vm->pmeg == 0)
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return (-1);
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kd->vmst = vm;
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@ -105,7 +127,7 @@ _kvm_initvtop(kd)
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/*
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* Read segment table.
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*/
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off = st.st_size - ctob(btoc(sizeof(vm->segmap)));
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off = st.st_size - roundup(sizeof(vm->segmap), kd->nbpg);
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errno = 0;
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if (lseek(kd->pmfd, (off_t)off, 0) == -1 && errno != 0 ||
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read(kd->pmfd, (char *)vm->segmap, sizeof(vm->segmap)) < 0) {
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@ -115,11 +137,11 @@ _kvm_initvtop(kd)
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/*
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* Read PMEGs.
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*/
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off = st.st_size - ctob(btoc(sizeof(vm->pmeg)) +
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btoc(sizeof(vm->segmap)));
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off = st.st_size - roundup(NPMEG * nptesg * sizeof(int), kd->nbpg) +
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((sizeof(vm->segmap) + kd->nbpg - 1) >> pgshift);
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errno = 0;
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if (lseek(kd->pmfd, (off_t)off, 0) == -1 && errno != 0 ||
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read(kd->pmfd, (char *)vm->pmeg, sizeof(vm->pmeg)) < 0) {
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read(kd->pmfd, (char *)vm->pmeg, NPMEG * nptesg * sizeof(int)) < 0) {
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_kvm_err(kd, kd->program, "cannot read PMEG table");
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return (-1);
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}
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@ -136,22 +158,44 @@ _kvm_initvtop(kd)
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* them is if we do a kvm_getprocs() on a dead kernel, which is
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* not too common.
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*/
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nlist[0].n_name = "_pmap_stod";
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nlist[1].n_name = 0;
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if (kvm_nlist(kd, nlist) != 0) {
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_kvm_err(kd, kd->program, "pmap_stod: no such symbol");
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nlist[0].n_name = "_cputyp";
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nlist[1].n_name = "_pmap_stod";
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nlist[2].n_name = 0;
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(void)kvm_nlist(kd, nlist);
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if (nlist[0].n_value == 0) {
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_kvm_err(kd, kd->program, "cputyp: no such symbol");
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return (-1);
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}
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if (kvm_read(kd, (u_long)nlist[0].n_value,
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(char *)vm->pmap_stod, sizeof(vm->pmap_stod))
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!= sizeof(vm->pmap_stod)) {
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_kvm_err(kd, kd->program, "cannot read pmap_stod");
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(char *)&cputyp, sizeof(cputyp)) != sizeof(cputyp)) {
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_kvm_err(kd, kd->program, "cannot read cputyp");
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return (-1);
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}
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/*
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* a kernel compiled only for the sun4 will not contain the symbol
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* map_stod. Instead, we are happy to use the identity map
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* initialized earlier.
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* If we are not a sun4, the lack of this symbol is fatal.
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*/
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if (nlist[1].n_value != 0) {
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if (kvm_read(kd, (u_long)nlist[1].n_value,
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(char *)vm->pmap_stod, sizeof(vm->pmap_stod))
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!= sizeof(vm->pmap_stod)) {
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_kvm_err(kd, kd->program, "cannot read pmap_stod");
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return (-1);
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}
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} else {
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if (cputyp != CPU_SUN4) {
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_kvm_err(kd, kd->program, "pmap_stod: no such symbol");
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return (-1);
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}
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}
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return (0);
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}
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#define VA_OFF(va) (va & (NBPG - 1))
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#define VA_OFF(va) (va & (kd->nbpg - 1))
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/*
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* Translate a user virtual address to a physical address.
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@ -168,6 +212,9 @@ _kvm_uvatop(kd, p, va, pa)
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register struct vmspace *vms = p->p_vmspace;
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struct usegmap *usp;
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if (pgshift == 0)
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getpgshift(kd);
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if ((u_long)vms < KERNBASE) {
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_kvm_err(kd, kd->program, "_kvm_uvatop: corrupt proc");
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return (0);
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@ -198,8 +245,8 @@ _kvm_uvatop(kd, p, va, pa)
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frame = pte & PG_PFNUM;
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else
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frame = HWTOSW(kd->vmst->pmap_stod, pte & PG_PFNUM);
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*pa = (frame << PGSHIFT) | off;
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return (NBPG - off);
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*pa = (frame << pgshift) | off;
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return (kd->nbpg - off);
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}
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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@ -223,16 +270,19 @@ _kvm_kvatop(kd, va, pa)
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register int pte;
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register int off;
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if (pgshift == 0)
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getpgshift(kd);
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if (va >= KERNBASE) {
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vm = kd->vmst;
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s = vm->segmap[VA_VSEG(va) - NUSEG];
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pte = vm->pmeg[s][VA_VPG(va)];
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pte = vm->pmeg[VA_VPG(va) + nptesg * s];
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if ((pte & PG_V) != 0) {
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off = VA_OFF(va);
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*pa = (HWTOSW(vm->pmap_stod, pte & PG_PFNUM)
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<< PGSHIFT) | off;
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<< pgshift) | off;
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return (NBPG - off);
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return (kd->nbpg - off);
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}
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}
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_kvm_err(kd, 0, "invalid address (%x)", va);
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