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Kernel inspects and sets sender id instead of userspace.

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Modified ipc handling so that from now on the kernel inspects and sets
the sender id if the receiver is receiving from L4_ANYTHREAD. This posed
a security problem since the receiver could not trust the sender for
sender information.
This commit is contained in:
Bahadir Balban
2008-02-11 11:11:17 +00:00
parent 0c7d2bbfd1
commit e0492d672f
5 changed files with 19 additions and 18 deletions
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9
src/arch/arm/exception.c
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@@ -16,15 +16,6 @@
#include INC_GLUE(utcb.h)
#include INC_SUBARCH(mm.h)
/*
* NOTE: These are defined in libl4 headers for userspace. Syslib uses
* these as conventional mr offsets to store ipc-related data commonly needed
* for all ipc parties.
*/
#define MR_TAG 0
#define MR_SENDER 1
#define MR_UNUSED_START 2
/* Send data fault ipc to the faulty task's pager */
void fault_ipc_to_pager(u32 faulty_pc, u32 fsr, u32 far)
{