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Basic VM and other minor improvements.

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Not complete, probably not fully debugged or optimized.
This commit is contained in:
Ben Gras
2008-11-19 12:26:10 +00:00
parent c888305e21
commit c078ec0331
273 changed files with 10814 additions and 4305 deletions
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24
kernel/system/do_vcopy.c
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@@ -25,13 +25,13 @@ register message *m_ptr; /* pointer to request message */
* requests. Although a single handler function is used, there are two
* different kernel calls so that permissions can be checked.
*/
int nr_req;
int nr_req, r;
vir_bytes caller_vir;
phys_bytes caller_phys;
phys_bytes kernel_phys;
phys_bytes bytes;
int i,s;
struct vir_cp_req *req;
struct vir_addr src, dst;
struct proc *pr;
{ static int first=1;
if (first)
@@ -41,17 +41,23 @@ register message *m_ptr; /* pointer to request message */
}
}
if(!(pr = endpoint_lookup(who_e)))
minix_panic("do_vcopy: caller doesn't exist", who_e);
/* Check if request vector size is ok. */
nr_req = (unsigned) m_ptr->VCP_VEC_SIZE;
if (nr_req > VCOPY_VEC_SIZE) return(EINVAL);
bytes = nr_req * sizeof(struct vir_cp_req);
/* Calculate physical addresses and copy (port,value)-pairs from user. */
caller_vir = (vir_bytes) m_ptr->VCP_VEC_ADDR;
caller_phys = umap_local(proc_addr(who_p), D, caller_vir, bytes);
if (0 == caller_phys) return(EFAULT);
kernel_phys = vir2phys(vir_cp_req);
phys_copy(caller_phys, kernel_phys, (phys_bytes) bytes);
src.segment = dst.segment = D;
src.proc_nr_e = who_e;
dst.proc_nr_e = SYSTEM;
dst.offset = (vir_bytes) vir_cp_req;
src.offset = (vir_bytes) m_ptr->VCP_VEC_ADDR;
if((r=virtual_copy_vmcheck(&src, &dst, bytes)) != OK)
return r;
/* Assume vector with requests is correct. Try to copy everything. */
m_ptr->VCP_NR_OK = 0;
@@ -62,7 +68,7 @@ register message *m_ptr; /* pointer to request message */
/* Check if physical addressing is used without SYS_PHYSVCOPY. */
if (((req->src.segment | req->dst.segment) & PHYS_SEG) &&
m_ptr->m_type != SYS_PHYSVCOPY) return(EPERM);
if ((s=virtual_copy(&req->src, &req->dst, req->count)) != OK)
if ((s=virtual_copy_vmcheck(&req->src, &req->dst, req->count)) != OK)
return(s);
m_ptr->VCP_NR_OK ++;
}