SVC: Difference between revisions
getprocinfo |
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svcReturnFromException updates the contents of the kernel stack frame with what the user provided in the TLS structure, sets TPIDR_EL0 to 1, then: | svcReturnFromException updates the contents of the kernel stack frame with what the user provided in the TLS structure, sets TPIDR_EL0 to 1, then: | ||
* if the provided error code is 0, gracefully pivots and returns from exception | * if the provided error code is 0, gracefully pivots and returns from exception | ||
* if it is not, replays the exception and pass it to the KDebug (see above). One can pass 0x10001 to prevent process termination | * if it is not, replays the exception and pass it to the KDebug (see above). One can pass 0x10001 to prevent process termination. If the process is attached, this also prevents crash-collection/termination (different from the exception handler behavior) | ||
Note that if a thread that wasn't faulting calls svcReturnFromException, it signals an "invalid syscall" exception | Note that if a thread that wasn't faulting calls svcReturnFromException, it signals an "invalid syscall" exception | ||