Paul Mackerras 3cdfcbfd32 powerpc: Change analyse_instr so it doesn't modify *regs ... The analyse_instr function currently doesn't just work out what an instruction does, it also executes those instructions whose effect is only to update CPU registers that are stored in struct pt_regs. This is undesirable because optprobes uses analyse_instr to work out if an instruction could be successfully emulated in future. This changes analyse_instr so it doesn't modify *regs; instead it stores information in the instruction_op structure to indicate what registers (GPRs, CR, XER, LR) would be set and what value they would be set to. A companion function called emulate_update_regs() can then use that information to update a pt_regs struct appropriately. As a minor cleanup, this replaces inline asm using the cntlzw and cntlzd instructions with calls to __builtin_clz() and __builtin_clzl(). Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2017-09-01 16:39:27 +10:00
..
asm	powerpc: Change analyse_instr so it doesn't modify *regs	2017-09-01 16:39:27 +10:00
uapi/asm	tty: Fix TIOCGPTPEER ioctl definition	2017-07-17 17:04:41 +02:00