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[PATCH] uml: physical memory map file fixes

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UML really wants shared memory semantics form its physical memory map file,
and the place for that is /dev/shm.  So move the default, and fix the error
messages to recognize that this value can be overridden.

Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rob Landley
2006-04-18 22:21:43 -07:00
committed by Linus Torvalds
parent f983c45ebe
commit 966a082f80
2 changed files with 118 additions and 24 deletions
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24
arch/um/os-Linux/start_up.c
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@ -296,29 +296,7 @@ static void __init check_ptrace(void)
check_sysemu();
}
extern int create_tmp_file(unsigned long long len);
static void check_tmpexec(void)
{
void *addr;
int err, fd = create_tmp_file(UM_KERN_PAGE_SIZE);
addr = mmap(NULL, UM_KERN_PAGE_SIZE,
PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE, fd, 0);
printf("Checking PROT_EXEC mmap in /tmp...");
fflush(stdout);
if(addr == MAP_FAILED){
err = errno;
perror("failed");
if(err == EPERM)
printf("/tmp must be not mounted noexec\n");
exit(1);
}
printf("OK\n");
munmap(addr, UM_KERN_PAGE_SIZE);
close(fd);
}
extern void check_tmpexec(void);
void os_early_checks(void)
{