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authorMichael Meissner <gnu@the-meissners.org>1997-05-13 22:04:32 +0000
committerMichael Meissner <gnu@the-meissners.org>1997-05-13 22:04:32 +0000
commit1b6f4dde350e06d59468db270111252b4256904c (patch)
tree6d5268c7c1baa3903692d940a2b3ab32643f2407 /sim/tic80/insns
parentaf942f1dc2d30bf7acfb221331da57af6f258aeb (diff)
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Make sure r0 == 0; Return EINVAL for system calls that are defined but not provided; Provide traps 74-79 as debugging traps
Diffstat (limited to 'sim/tic80/insns')
-rw-r--r--sim/tic80/insns26
1 files changed, 26 insertions, 0 deletions
diff --git a/sim/tic80/insns b/sim/tic80/insns
index ea0a5f3..270b5c4 100644
--- a/sim/tic80/insns
+++ b/sim/tic80/insns
@@ -1005,6 +1005,7 @@ void::function::do_swcr:int Dest, signed32 rSource, signed32 cr
// trap
void::function::do_trap:unsigned32 trap_number
+ int i;
TRACE_SINK1 (MY_INDEX, trap_number);
switch (trap_number)
{
@@ -1041,6 +1042,12 @@ void::function::do_trap:unsigned32 trap_number
break;
}
default:
+ /* For system calls which are defined, just return EINVAL instead of trapping */
+ if (GPR(15) <= 204)
+ {
+ GPR(2) = -22; /* -EINVAL */
+ break;
+ }
engine_error (SD, CPU, cia,
"0x%lx: unknown syscall %d",
(unsigned long) cia.ip, GPR(15));
@@ -1048,6 +1055,25 @@ void::function::do_trap:unsigned32 trap_number
break;
case 73:
engine_halt (SD, CPU, cia, sim_stopped, SIGTRAP);
+
+ /* Add a few traps for now to print the register state */
+ case 74:
+ case 75:
+ case 76:
+ case 77:
+ case 78:
+ case 79:
+ if (!TRACE_ALU_P (CPU))
+ trace_one_insn (SD, CPU, cia.ip, 1, itable[MY_INDEX].file,
+ itable[MY_INDEX].line_nr, "trap",
+ "Trap %d", trap_number);
+
+ for (i = 0; i < 32; i++)
+ sim_io_eprintf (SD, "%s0x%.8lx%s", ((i % 8) == 0) ? "\t" : " ", (long)GPR(i),
+ (((i+1) % 8) == 0) ? "\n" : "");
+ sim_io_write_stderr (SD, "\n", 1);
+ break;
+
default:
engine_error (SD, CPU, cia,
"0x%lx: unsupported trap %d",