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authorNick Clifton <nickc@redhat.com>2002-08-15 14:28:55 +0000
committerNick Clifton <nickc@redhat.com>2002-08-15 14:28:55 +0000
commitc7a7b500fda4d78720600b4f66c26b589496b91d (patch)
treebf2ca611b025e4272759fc4e13a2fd0c8bce1794 /sim/arm
parent35b1837e4658c9700c8b13d2ab72dd57dac3ae43 (diff)
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Catch and ignore SWIs of -1, they can be caused by an interrupted system
call being resumed by GDB.
Diffstat (limited to 'sim/arm')
-rw-r--r--sim/arm/ChangeLog5
-rw-r--r--sim/arm/armos.c14
2 files changed, 19 insertions, 0 deletions
diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index acd66ad..9ce404e 100644
--- a/sim/arm/ChangeLog
+++ b/sim/arm/ChangeLog
@@ -1,3 +1,8 @@
+2002-08-15 Nick Clifton <nickc@redhat.com>
+
+ * armos.c (ARMul_OSHandleSWI): Catch and ignore SWIs of -1, they
+ can be caused by an interrupted system call being resumed by GDB.
+
2002-07-05 Nick Clifton <nickc@cambridge.redhat.com>
* armemu.c (ARMul_Emulate32): Add more tests for valid MIA, MIAPH
diff --git a/sim/arm/armos.c b/sim/arm/armos.c
index ccf9a57..7c0360c 100644
--- a/sim/arm/armos.c
+++ b/sim/arm/armos.c
@@ -553,6 +553,13 @@ ARMul_OSHandleSWI (ARMul_State * state, ARMword number)
/* R0 is a reason code. */
switch (state->Reg[0])
{
+ case -1:
+ /* This can happen when a SWI is interrupted (eg receiving a
+ ctrl-C whilst processing SWIRead()). The SWI will complete
+ returning -1 in r0 to the caller. If GDB is then used to
+ resume the system call the reason code will now be -1. */
+ return FALSE;
+
/* Unimplemented reason codes. */
case AngelSWI_Reason_ReadC:
case AngelSWI_Reason_IsTTY:
@@ -685,6 +692,13 @@ ARMul_OSHandleSWI (ARMul_State * state, ARMword number)
/* These are used by the FPE code. */
break;
+ case -1:
+ /* This can happen when a SWI is interrupted (eg receiving a
+ ctrl-C whilst processing SWIRead()). The SWI will complete
+ returning -1 in r0 to the caller. If GDB is then used to
+ resume the system call the reason code will now be -1. */
+ return FALSE;
+
case 0x180001: /* RedBoot's Syscall SWI in ARM mode. */
if (swi_mask & SWI_MASK_REDBOOT)
{