diff options
| author | Alexander Graf <agraf@suse.de> | 2015-11-11 22:49:40 +0000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2015-11-12 13:15:54 +1100 |
| commit | 488661ee9dd300110a6612d52fe68e2bb3539a5f (patch) | |
| tree | b0ef5bce6ec8512399094513e4fe04b33a8e97ce /target-ppc | |
| parent | 4248b336d3c1b74e343842c5b478b165d75f5ce8 (diff) | |
PPC: Fix lswx bounds checks
The lswx instruction checks whether the desired string actually fits
into all defined registers. Unfortunately it does the calculation wrong,
resulting in illegal instruction traps for loads that really should fit.
Fix it up, making Mac OS happier.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/mem_helper.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/target-ppc/mem_helper.c b/target-ppc/mem_helper.c index 6d37dae7b0..7e1f234aa5 100644 --- a/target-ppc/mem_helper.c +++ b/target-ppc/mem_helper.c @@ -100,8 +100,9 @@ void helper_lswx(CPUPPCState *env, target_ulong addr, uint32_t reg, uint32_t ra, uint32_t rb) { if (likely(xer_bc != 0)) { - if (unlikely((ra != 0 && reg < ra && (reg + xer_bc) > ra) || - (reg < rb && (reg + xer_bc) > rb))) { + int num_used_regs = (xer_bc + 3) / 4; + if (unlikely((ra != 0 && reg < ra && (reg + num_used_regs) > ra) || + (reg < rb && (reg + num_used_regs) > rb))) { helper_raise_exception_err(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_LSWX); |