hheik
/
xv6-riscv-rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Slight simplification of copyuvm. We could simplify other things now that processes are contiguous, but we'd have to think harder about the error paths.

feat/start
Austin Clements 2010-09-01 17:14:58 -04:00
parent b1d41d6788
commit d3ecf3eb44
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
vm.c
View File

@ -310,14 +310,14 @@ copyuvm(pde_t *pgdir, uint sz)
for(i = 0; i < sz; i += PGSIZE){
if(!(pte = walkpgdir(pgdir, (void *)i, 0)))
panic("copyuvm: pte should exist\n");
if(*pte & PTE_P){
pa = PTE_ADDR(*pte);
if(!(mem = kalloc()))
goto bad;
memmove(mem, (char *)pa, PGSIZE);
if(!mappages(d, (void *)i, PGSIZE, PADDR(mem), PTE_W|PTE_U))
goto bad;
}
if(!(*pte & PTE_P))
panic("copyuvm: page not present\n");
pa = PTE_ADDR(*pte);
if(!(mem = kalloc()))
goto bad;
memmove(mem, (char *)pa, PGSIZE);
if(!mappages(d, (void *)i, PGSIZE, PADDR(mem), PTE_W|PTE_U))
goto bad;
}
return d;