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| author | Michael Meissner <gnu@the-meissners.org> | 1997-05-13 22:04:32 +0000 |
|---|---|---|
| committer | Michael Meissner <gnu@the-meissners.org> | 1997-05-13 22:04:32 +0000 |
| commit | 1b6f4dde350e06d59468db270111252b4256904c (patch) | |
| tree | 6d5268c7c1baa3903692d940a2b3ab32643f2407 /sim/tic80 | |
| parent | af942f1dc2d30bf7acfb221331da57af6f258aeb (diff) | |
| download | gdb-1b6f4dde350e06d59468db270111252b4256904c.zip gdb-1b6f4dde350e06d59468db270111252b4256904c.tar.gz gdb-1b6f4dde350e06d59468db270111252b4256904c.tar.bz2 | |
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')
| -rw-r--r-- | sim/tic80/ChangeLog | 9 | ||||
| -rw-r--r-- | sim/tic80/insns | 26 | ||||
| -rw-r--r-- | sim/tic80/interp.c | 2 |
3 files changed, 37 insertions, 0 deletions
diff --git a/sim/tic80/ChangeLog b/sim/tic80/ChangeLog index c955fdc..8ef6fec 100644 --- a/sim/tic80/ChangeLog +++ b/sim/tic80/ChangeLog @@ -1,3 +1,12 @@ +Tue May 13 18:00:10 1997 Mike Meissner <meissner@cygnus.com> + + * insns (do_trap): For system calls that are defined, but not + provided return EINVAL. Temporarily add traps 74-79 to just print + the register state. + + * interp.c (engine_{run_until_stop,step}): Before executing + instructions, make sure r0 == 0. + Tue May 13 16:39:37 1997 Andrew Cagney <cagney@b1.cygnus.com> * alu.h (IMEM): Take full cia not just IP as argument. 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", diff --git a/sim/tic80/interp.c b/sim/tic80/interp.c index 24cfad1..e013302 100644 --- a/sim/tic80/interp.c +++ b/sim/tic80/interp.c @@ -114,6 +114,7 @@ engine_run_until_stop (SIM_DESC sd, do { instruction_word insn = IMEM (cia); + cpu->reg[0] = 0; /* force r0 to always contain 0 */ cia = idecode_issue (sd, insn, cia); } while (*keep_running); @@ -135,6 +136,7 @@ engine_step (SIM_DESC sd) sd->restart_ok = 1; cia = cpu->cia; insn = IMEM (cia); + cpu->reg[0] = 0; /* force r0 to always contain 0 */ cia = idecode_issue (sd, insn, cia); engine_halt (sd, cpu, cia, sim_stopped, SIGTRAP); } |