linux-user: Save the correct resume address for MIPS signal handling
The current ISA mode needs to be saved in bit 0 of the resume address. If the current instruction happens to be in a branch delay slot, then the address of the preceding jump instruction should be stored instead. exception_resume_pc already does both of these tasks, so it is made available and reused. MIPS_HFLAG_BMASK in hflags is cleared, otherwise QEMU may treat the first instruction of the signal handler as a delay slot instruction. Signed-off-by: NKwok Cheung Yeung <kcy@codesourcery.com> Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
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