sanchayanmaity/xv6-cs450
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make code match comment

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rsc 2007-08-27 23:53:17 +00:00
parent 64c4737477
commit 3a2310f746
2 changed files with 7 additions and 8 deletions
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13
syscall.c
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@ -42,20 +42,20 @@ fetchstr(struct proc *p, uint addr, char **pp)
// Fetch the argno'th 32-bit system call argument.
int
argint(int argno, int *ip)
argint(int n, int *ip)
{
return fetchint(cp, cp->tf->esp + 4 + 4*argno, ip);
return fetchint(cp, cp->tf->esp + 4 + 4*n, ip);
}
// Fetch the nth word-sized system call argument as a pointer
// to a block of memory of size n bytes. Check that the pointer
// lies within the process address space.
int
argptr(int argno, char **pp, int size)
argptr(int n, char **pp, int size)
{
int i;
if(argint(argno, &i) < 0)
if(argint(n, &i) < 0)
return -1;
if((uint)i >= cp->sz || (uint)i+size >= cp->sz)
return -1;
@ -68,10 +68,10 @@ argptr(int argno, char **pp, int size)
// (There is no shared writable memory, so the string can't change
// between this check and being used by the kernel.)
int
argstr(int argno, char **pp)
argstr(int n, char **pp)
{
int addr;
if(argint(argno, &addr) < 0)
if(argint(n, &addr) < 0)
return -1;
return fetchstr(cp, addr, pp);
}
@ -88,7 +88,6 @@ extern int sys_kill(void);
extern int sys_link(void);
extern int sys_mkdir(void);
extern int sys_mknod(void);
//PAGEBREAK: 0
extern int sys_open(void);
extern int sys_pipe(void);
extern int sys_read(void);

2
sysfile.c
View file

@ -17,7 +17,7 @@ argfd(int n, int *pfd, struct file **pf)
int fd;
struct file *f;
if(argint(argno, &fd) < 0)
if(argint(n, &fd) < 0)
return -1;
if(fd < 0 || fd >= NOFILE || (f=cp->ofile[fd]) == 0)
return -1;