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authorNick Clifton <nickc@redhat.com>2016-07-14 10:38:07 +0100
committerNick Clifton <nickc@redhat.com>2016-07-14 10:38:07 +0100
commit7df94786e4723ba93d8982e55fc5e652b4b80142 (patch)
treea396635bc96e67a428947ebc8a283614797436ad /sim
parentfa1c0170176a5e4820f43824cffe80ffc4e7a717 (diff)
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Small improvements to the ARM simulator to cope with illegal binaries.
* armemu.c (Multiply64): Only issue error messages about invalid arguments if debugging is enabled. * armos.c (ARMul_OSHandleSWI): Ignore invalid flags.
Diffstat (limited to 'sim')
-rw-r--r--sim/arm/ChangeLog6
-rw-r--r--sim/arm/armemu.c6
-rw-r--r--sim/arm/armos.c5
3 files changed, 13 insertions, 4 deletions
diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index cae6f52..2ce9429 100644
--- a/sim/arm/ChangeLog
+++ b/sim/arm/ChangeLog
@@ -1,3 +1,9 @@
+2016-07-14 Nick Clifton <nickc@redhat.com>
+
+ * armemu.c (Multiply64): Only issue error messages about invalid
+ arguments if debugging is enabled.
+ * armos.c (ARMul_OSHandleSWI): Ignore invalid flags.
+
2016-01-10 Mike Frysinger <vapier@gentoo.org>
* config.in, configure: Regenerate.
diff --git a/sim/arm/armemu.c b/sim/arm/armemu.c
index 5fde3fd..76f398b 100644
--- a/sim/arm/armemu.c
+++ b/sim/arm/armemu.c
@@ -5950,10 +5950,10 @@ Multiply64 (ARMul_State * state, ARMword instr, int msigned, int scc)
;
else
#endif
- if (nRdHi == nRm || nRdLo == nRm)
+ /* BAD code can trigger this result. So only complain if debugging. */
+ if (state->Debug && (nRdHi == nRm || nRdLo == nRm))
fprintf (stderr, "sim: MULTIPLY64 - INVALID ARGUMENTS: %d %d %d\n",
nRdHi, nRdLo, nRm);
-
if (msigned)
{
/* Compute sign of result and adjust operands if necessary. */
@@ -5998,7 +5998,7 @@ Multiply64 (ARMul_State * state, ARMword instr, int msigned, int scc)
state->Reg[nRdLo] = RdLo;
state->Reg[nRdHi] = RdHi;
}
- else
+ else if (state->Debug)
fprintf (stderr, "sim: MULTIPLY64 - INVALID ARGUMENTS\n");
if (scc)
diff --git a/sim/arm/armos.c b/sim/arm/armos.c
index c49036f..ea3d229 100644
--- a/sim/arm/armos.c
+++ b/sim/arm/armos.c
@@ -260,7 +260,10 @@ SWIopen (ARMul_State * state, ARMword name, ARMword SWIflags)
return;
/* Now we need to decode the Demon open mode. */
- flags = translate_open_mode[SWIflags];
+ if (SWIflags >= sizeof (translate_open_mode) / sizeof (translate_open_mode[0]))
+ flags = 0;
+ else
+ flags = translate_open_mode[SWIflags];
/* Filename ":tt" is special: it denotes stdin/out. */
if (strcmp (buf, ":tt") == 0)