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pagetable lab initialized

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CGH0S7
2025-05-06 11:20:36 +08:00
parent 0e751d690f
commit 38997cbef6
42 changed files with 1963 additions and 1154 deletions
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10
kernel/exec.c
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@@ -75,17 +75,17 @@ exec(char *path, char **argv)
p = myproc();
uint64 oldsz = p->sz;
// Allocate two pages at the next page boundary.
// Allocate some pages at the next page boundary.
// Make the first inaccessible as a stack guard.
// Use the second as the user stack.
// Use the rest as the user stack.
sz = PGROUNDUP(sz);
uint64 sz1;
if((sz1 = uvmalloc(pagetable, sz, sz + 2*PGSIZE, PTE_W)) == 0)
if((sz1 = uvmalloc(pagetable, sz, sz + (USERSTACK+1)*PGSIZE, PTE_W)) == 0)
goto bad;
sz = sz1;
uvmclear(pagetable, sz-2*PGSIZE);
uvmclear(pagetable, sz-(USERSTACK+1)*PGSIZE);
sp = sz;
stackbase = sp - PGSIZE;
stackbase = sp - USERSTACK*PGSIZE;
// Push argument strings, prepare rest of stack in ustack.
for(argc = 0; argv[argc]; argc++) {