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debugger - new WANTS_BRK bit. setting it will cause BRKS to invoke the debugger instead of being handled within the 65816.

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This commit is contained in:
Kelvin Sherlock 2019-02-06 22:50:38 -05:00
parent dccb965631
commit 68260dcf6a
4 changed files with 12 additions and 11 deletions
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3
src/defcomm.h
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@ -81,7 +81,7 @@
#define FPLUS_PLUS_3 0x10
#define FPLUS_PLUS_X_M1 0x18
#define RET_BREAK 0x1
#define RET_BRK 0x1
#define RET_COP 0x2
#define RET_WDM 0x3
#define RET_MVP 0x4
@ -100,6 +100,7 @@
#define FLAG_IGNORE_MP 0x01
#define FLAG_IGNORE_BP 0x02
#define FLAG_STEP 0x04
#define FLAG_WANT_BRK 0x08
#define MODE_BORDER 0
#define MODE_TEXT 1

7
src/engine_c.c
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@ -1026,15 +1026,16 @@ int enter_engine(Engine_reg *engine_ptr) {
word32 addr_latch;
word32 tmp1, tmp2;
word32 flags = 0;
word32 saved_pc = 0;
word32 saved_psr = 0;
word32 abort_support = g_num_mp_breakpoints ? 1 : 0;
word32 kpc_support = g_num_bp_breakpoints ? 1 : 0;
if (engine_ptr->flags & FLAG_IGNORE_MP) abort_support = 0;
if (engine_ptr->flags & FLAG_IGNORE_BP) kpc_support = 0;
flags = engine_ptr->flags;
if (flags & FLAG_IGNORE_MP) abort_support = 0;
if (flags & FLAG_IGNORE_BP) kpc_support = 0;
tmp_pc_ptr = 0;

9
src/instable.h
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@ -71,16 +71,17 @@ brk_testing_SYM
DEC_KPC2;
CYCLES_PLUS_2
b dispatch_done
depi RET_BREAK,3,4,ret0
depi RET_BRK,3,4,ret0
#else
GET_1BYTE_ARG;
if(g_testing) {
if(flags & FLAG_WANT_BRK) {
CYCLES_PLUS_2;
FINISH(RET_BREAK, arg);
FINISH(RET_BRK, arg);
}
g_num_brk++;
INC_KPC_2;
g_num_brk++;
psr = psr & (~0x82);
psr |= (neg << 7);

4
src/sim65816.c
View File

@ -2239,9 +2239,6 @@ void handle_action(word32 ret) {
type = EXTRU(ret,3,4);
switch(type) {
case RET_BREAK:
do_break(ret & 0xff);
break;
case RET_COP:
do_cop(ret & 0xff);
break;
@ -2279,6 +2276,7 @@ void handle_action(word32 ret) {
break;
case RET_BP:
case RET_MP:
case RET_BRK:
/* handled elsewhere */
break;
default: