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Added 16-bit dereferencing operator (`{address}`) to the debugger. Closes #38

This commit is contained in:
Lior Halphon 2018-02-28 19:39:22 +02:00
parent 58d287da7a
commit fb03479a1f
1 changed files with 70 additions and 1 deletions
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71
Core/debugger.c
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@ -12,6 +12,7 @@ typedef struct {
typedef struct {
enum {
LVALUE_MEMORY,
LVALUE_MEMORY16,
LVALUE_REG16,
LVALUE_REG_H,
LVALUE_REG_L,
@ -209,6 +210,19 @@ static value_t read_lvalue(GB_gameboy_t *gb, lvalue_t lvalue)
return r;
}
return VALUE_16(GB_read_memory(gb, lvalue.memory_address.value));
case LVALUE_MEMORY16:
if (lvalue.memory_address.has_bank) {
banking_state_t state;
save_banking_state(gb, &state);
switch_banking_state(gb, lvalue.memory_address.bank);
value_t r = VALUE_16(GB_read_memory(gb, lvalue.memory_address.value));
restore_banking_state(gb, &state);
return r;
}
return VALUE_16(GB_read_memory(gb, lvalue.memory_address.value) |
(GB_read_memory(gb, lvalue.memory_address.value + 1) * 0x100));
case LVALUE_REG16:
return VALUE_16(*lvalue.register_address);
@ -235,6 +249,19 @@ static void write_lvalue(GB_gameboy_t *gb, lvalue_t lvalue, uint16_t value)
}
GB_write_memory(gb, lvalue.memory_address.value, value);
return;
case LVALUE_MEMORY16:
if (lvalue.memory_address.has_bank) {
banking_state_t state;
save_banking_state(gb, &state);
switch_banking_state(gb, lvalue.memory_address.bank);
GB_write_memory(gb, lvalue.memory_address.value, value);
restore_banking_state(gb, &state);
return;
}
GB_write_memory(gb, lvalue.memory_address.value, value);
GB_write_memory(gb, lvalue.memory_address.value + 1, value >> 8);
return;
case LVALUE_REG16:
*lvalue.register_address = value;
@ -382,6 +409,22 @@ static lvalue_t debugger_evaluate_lvalue(GB_gameboy_t *gb, const char *string,
return (lvalue_t){LVALUE_MEMORY, .memory_address = debugger_evaluate(gb, string + 1, length - 2, error, watchpoint_address, watchpoint_new_value)};
}
}
else if (string[0] == '{' && string[length - 1] == '}') {
// Attempt to strip curly parentheses (memory dereference)
signed int depth = 0;
for (int i = 0; i < length; i++) {
if (string[i] == '{') depth++;
if (depth == 0) {
// First and last are not matching
depth = 1;
break;
}
if (string[i] == '}') depth--;
}
if (depth == 0) {
return (lvalue_t){LVALUE_MEMORY16, .memory_address = debugger_evaluate(gb, string + 1, length - 2, error, watchpoint_address, watchpoint_new_value)};
}
}
// Registers
if (string[0] != '$' && (string[0] < '0' || string[0] > '9')) {
@ -486,7 +529,33 @@ value_t debugger_evaluate(GB_gameboy_t *gb, const char *string,
}
goto exit;
}
}
else if (string[0] == '{' && string[length - 1] == '}') {
// Attempt to strip curly parentheses (memory dereference)
signed int depth = 0;
for (int i = 0; i < length; i++) {
if (string[i] == '{') depth++;
if (depth == 0) {
// First and last are not matching
depth = 1;
break;
}
if (string[i] == '}') depth--;
}
if (depth == 0) {
value_t addr = debugger_evaluate(gb, string + 1, length - 2, error, watchpoint_address, watchpoint_new_value);
banking_state_t state;
if (addr.bank) {
save_banking_state(gb, &state);
switch_banking_state(gb, addr.bank);
}
ret = VALUE_16(GB_read_memory(gb, addr.value) | (GB_read_memory(gb, addr.value + 1) * 0x100));
if (addr.bank) {
restore_banking_state(gb, &state);
}
goto exit;
}
}
// Search for lowest priority operator
signed int depth = 0;