From ad47ff3e33503e0969db2d4f9a40942aa6414598 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Tue, 19 Sep 2017 20:45:52 +1000 Subject: [PATCH] powerpc/sstep: Fix issues with set_cr0() set_cr0() broke when we changed analyse_instr() to not modify the register state. Instead of looking at regs->gpr[x] which has not been updated yet, we need to look at op->val. Fixes: 3cdfcbfd32b9 ("powerpc: Change analyse_instr so it doesn't modify *regs") Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman --- arch/powerpc/lib/sstep.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index fb9f58b868e7..9d72e5900320 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -944,9 +944,9 @@ NOKPROBE_SYMBOL(emulate_dcbz); : "r" (addr), "i" (-EFAULT), "0" (err)) static nokprobe_inline void set_cr0(const struct pt_regs *regs, - struct instruction_op *op, int rd) + struct instruction_op *op) { - long val = regs->gpr[rd]; + long val = op->val; op->type |= SETCC; op->ccval = (regs->ccr & 0x0fffffff) | ((regs->xer >> 3) & 0x10000000); @@ -1326,7 +1326,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, case 13: /* addic. */ imm = (short) instr; add_with_carry(regs, op, rd, regs->gpr[ra], imm, 0); - set_cr0(regs, op, rd); + set_cr0(regs, op); return 1; case 14: /* addi */ @@ -1397,13 +1397,13 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, case 28: /* andi. */ op->val = regs->gpr[rd] & (unsigned short) instr; - set_cr0(regs, op, ra); + set_cr0(regs, op); goto logical_done_nocc; case 29: /* andis. */ imm = (unsigned short) instr; op->val = regs->gpr[rd] & (imm << 16); - set_cr0(regs, op, ra); + set_cr0(regs, op); goto logical_done_nocc; #ifdef __powerpc64__ @@ -2526,7 +2526,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, logical_done: if (instr & 1) - set_cr0(regs, op, ra); + set_cr0(regs, op); logical_done_nocc: op->reg = ra; op->type |= SETREG; @@ -2534,7 +2534,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, arith_done: if (instr & 1) - set_cr0(regs, op, rd); + set_cr0(regs, op); compute_done: op->reg = rd; op->type |= SETREG;