PERFORCE change 123297 for review
Jesper Brix Rosenkilde
jbr at FreeBSD.org
Tue Jul 10 23:09:02 UTC 2007
http://perforce.freebsd.org/chv.cgi?CH=123297
Change 123297 by jbr at jbr_bob on 2007/07/10 23:08:41
First attempt at copying from kernel to user space, not sure it works.
Affected files ...
.. //depot/projects/soc2007/jbr-syscall/src/sys/kern/kern_exec.c#4 edit
Differences ...
==== //depot/projects/soc2007/jbr-syscall/src/sys/kern/kern_exec.c#4 (text+ko) ====
@@ -879,6 +879,11 @@
}
}
+struct test {
+ unsigned int pid;
+ char proctitle[256];
+};
+
/*
* Destroy old address space, and allocate a new stack
* The new stack is only SGROWSIZ large because it is grown
@@ -894,6 +899,8 @@
struct vmspace *vmspace = p->p_vmspace;
vm_offset_t stack_addr;
vm_map_t map;
+
+ struct test test_data = {42, "Humppa!"};
imgp->vmspace_destroyed = 1;
imgp->sysent = sv;
@@ -918,11 +925,15 @@
map = &vmspace->vm_map;
}
+ sv->sv_sysshm = sv->sv_minuser;
+
/* Allocate memory shared between process and kernel */
- error = vm_map_sysshm(map, sv->sv_minuser, 8);
+ error = vm_map_sysshm(map, sv->sv_sysshm, sizeof(struct test));
if (error)
return (error);
+ copyout(&test_data, (void *) sv->sv_sysshm, sizeof(struct test));
+
/* Allocate a new stack */
stack_addr = sv->sv_usrstack - maxssiz;
error = vm_map_stack(map, stack_addr, (vm_size_t)maxssiz,
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