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um: Add kerneldoc for segv_handler

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Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Thomas Meyer 2017-07-06 00:34:04 +02:00 committed by Richard Weinberger
parent 171fa6928b
commit 88af23381a
1 changed files with 10 additions and 0 deletions
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10
arch/um/kernel/trap.c
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@ -183,6 +183,16 @@ void fatal_sigsegv(void)
os_dump_core(); os_dump_core();
} }
/**
* segv_handler() - the SIGSEGV handler
* @sig: the signal number
* @unused_si: the signal info struct; unused in this handler
* @regs: the ptrace register information
*
* The handler first extracts the faultinfo from the UML ptrace regs struct.
* If the userfault did not happen in an UML userspace process, bad_segv is called.
* Otherwise the signal did happen in a cloned userspace process, handle it.
*/
void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs)
{ {
struct faultinfo * fi = UPT_FAULTINFO(regs); struct faultinfo * fi = UPT_FAULTINFO(regs);