[fpc-devel] Signal handlers
jonas.maebe at elis.ugent.be
Wed Jul 18 14:07:30 CEST 2007
On 17 Jul 2007, at 23:43, Micha Nelissen wrote:
> SignalToRunError is a signal handler, but it calls an ErrorProc
> many functions, like CRelocateThreadVar (for accessing the exception
> stack), GetMem (to allocate an exception object); are these functions
> guaranteed to run correctly in a signal handler ?
Probably not. For darwin/ppc, I actually do it differently (for
another reason, but that's not relevant here): I change the signal
context to return to HandleErrorAddrFrame, putting the required
parameters (runerror number, program counter/instruction pointer,
stack pointer) in the parameter registers of the context.
Since there are only 3 parameters, it should be possible to do this
even on i386.
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