Messages in this thread |  | | Date | Sun, 30 Sep 2001 22:47:06 +1100 | From | (Bruce Janson) | Subject | the fault address of a traced process |
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One process traces another. When the traced process tries to read, write or execute an unmapped address it is stopped with a SIGSEGV signal. The tracer now wants to determine the traced process' faulted address. According to the (2.2.19) kernel source
.../arch/i386/mm/fault.c:do_page_fault()
such a fault in user mode causes the offending address and error code to be saved in
tsk->tss.cr2
and
tsk->tss.error_code
respectively. There do not appear to be ptrace() or /proc hooks to extract this data directly. In earlier unices extraction of this data would have required grubbing around in /dev/kmem using the kernel namelist as a guide. How should a tracer extract this information under a current (2.2.*, 2.4.*) Linux? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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