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debugger: some fixes and improvements.

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This commit is contained in:
Maxim Poliakovski
2021-01-12 15:17:30 +01:00
parent 2bac606365
commit d8f7588693
3 changed files with 69 additions and 20 deletions
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debugger/debugger.cpp
+69 -7
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@@ -19,6 +19,7 @@ You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <array>
#include <fstream>
#include <iomanip>
#include <iostream>
@@ -55,8 +56,9 @@ static uint32_t str2num(string& num_str) {
static void show_help() {
cout << "Debugger commands:" << endl;
cout << " step -- execute single instruction" << endl;
cout << " si -- shortcut for step" << endl;
cout << " step [N] -- execute single instruction" << endl;
cout << " N is an optional step count" << endl;
cout << " si [N] -- shortcut for step" << endl;
cout << " next -- same as step but treats subroutine calls" << endl;
cout << " as single instructions." << endl;
cout << " ni -- shortcut for next" << endl;
@@ -74,6 +76,7 @@ static void show_help() {
cout << " disas N,X -- disassemble N instructions starting at address X" << endl;
cout << " X can be any number or a known register name" << endl;
cout << " disas with no arguments defaults to disas 1,pc" << endl;
cout << " da N,X -- shortcut for disas" << endl;
#ifdef ENABLE_68K_DEBUGGER
cout << " context X -- switch to the debugging context X." << endl;
cout << " X can be either 'ppc' (default) or '68k'" << endl;
@@ -328,6 +331,39 @@ static void disasm(uint32_t count, uint32_t address) {
}
}
static void print_gprs() {
string reg_name;
int i;
for (i = 0; i < 32; i++) {
reg_name = "R" + to_string(i);
cout << right << std::setw(3) << setfill(' ') << reg_name << " : " <<
setw(8) << setfill('0') << right << uppercase << hex << get_reg(reg_name);
if (i & 1) {
cout << endl;
} else {
cout << "\t\t";
}
}
array<string,6> sprs = {"PC", "LR", "CR", "CTR", "XER", "MSR"};
for (auto &spr : sprs) {
cout << right << std::setw(3) << setfill(' ') << spr << " : " <<
setw(8) << setfill('0') << uppercase << hex << get_reg(spr);
if (i & 1) {
cout << endl;
} else {
cout << "\t\t";
}
i++;
}
}
void enter_debugger() {
string inp, cmd, addr_str, expr_str, reg_expr, last_cmd, reg_value_str, inst_string, inst_num_str;
uint32_t addr, inst_grab;
@@ -403,12 +439,31 @@ void enter_debugger() {
cout << exc.what() << endl;
}
} else if (cmd == "step" || cmd == "si") {
int count;
expr_str = "";
ss >> expr_str;
if (expr_str.length() > 0) {
try {
count = str2num(expr_str);
} catch (invalid_argument& exc) {
cout << exc.what() << endl;
count = 1;
}
} else {
count = 1;
}
if (context == 2) {
#ifdef ENABLE_68K_DEBUGGER
exec_single_68k();
for (; --count >= 0;) {
exec_single_68k();
}
#endif
} else {
ppc_exec_single();
for (; --count >= 0;) {
ppc_exec_single();
}
}
} else if (cmd == "next" || cmd == "ni") {
addr_str = "PC";
@@ -428,7 +483,7 @@ void enter_debugger() {
} catch (invalid_argument& exc) {
cout << exc.what() << endl;
}
} else if (cmd == "disas") {
} else if (cmd == "disas" || cmd == "da") {
expr_str = "";
ss >> expr_str;
if (expr_str.length() > 0) {
@@ -437,9 +492,16 @@ void enter_debugger() {
cout << "disas: not enough arguments specified." << endl;
continue;
}
inst_num_str = expr_str.substr(0, expr_str.find_first_of(","));
inst_grab = stol(inst_num_str, NULL, 0);
addr_str = expr_str.substr(expr_str.find_first_of(",") + 1);
try {
inst_grab = str2num(inst_num_str);
} catch (invalid_argument& exc) {
cout << exc.what() << endl;
continue;
}
addr_str = expr_str.substr(expr_str.find_first_of(",") + 1);
try {
addr = str2addr(addr_str);
} catch (invalid_argument& exc) {