On 06/21, David Daney wrote: > > On 06/21/2013 06:39 AM, James Hogan wrote: >> Therefore add sig_to_exitcode() and exitcode_to_sig() functions which >> map signal numbers > 126 to exit code 126 and puts the remainder (i.e. >> sig - 126) in higher bits. This allows WIFSIGNALED() to return true for >> both SIG127 and SIG128, and allows WTERMSIG to be later updated to read >> the correct signal number for SIG127 and SIG128. > > I really hate this approach. > > Can we just change the ABI to reduce the number of signals so that all > the standard C library wait related macros don't have to be changed? > > Think about it, any user space program using signal numbers 127 and 128 > doesn't work correctly as things exist today, so removing those two will > be no great loss. Oh, I agree. Besides, this changes ABI anyway. And if we change it we can do this in a more clean way, afaics. MIPS should simply use 2 bytes in exit_code for signal number. Yes, this means we need replace 0x80/0x7f in exit.c by ifdef'ed numbers. And yes, this means that WIFSIGNALED/etc should be updated too, but this is also true with this patch. Oleg.
