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gdb: provide more accurate stop reasons

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Lephe 2024-03-30 21:42:34 +01:00
parent d9414bb6f2
commit ab528b27a8
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GPG key ID: 1BBA026E13FC0495
1 changed files with 21 additions and 1 deletions
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22
src/gdb/gdb.c
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@ -168,9 +168,14 @@ static ssize_t gdb_send_packet(const char* packet, size_t packet_length)
return buffer_length; return buffer_length;
} }
static int gdb_signal_number = 0;
static void gdb_send_stop_reply(void) static void gdb_send_stop_reply(void)
{ {
gdb_send_packet("S05", 3); // SIGTRAP char str[4] = "S00";
uint8_t num = gdb_signal_number ? gdb_signal_number : 5 /* SIGTRAP */;
gdb_hexlify(str+1, &num, 1);
gdb_send_packet(str, 3);
} }
static void gdb_handle_qXfer_packet(const char* packet, const char* data, size_t data_size) static void gdb_handle_qXfer_packet(const char* packet, const char* data, size_t data_size)
@ -586,6 +591,8 @@ void gdb_main(gdb_cpu_state_t* cpu_state)
ret: ret:
// We're started after the first round of exchanges // We're started after the first round of exchanges
gdb_started = true; gdb_started = true;
gdb_signal_number = 0;
} }
static void gdb_notifier_function(void) static void gdb_notifier_function(void)
@ -629,6 +636,19 @@ static int gdb_panic_handler(uint32_t code)
uint32_t spc; uint32_t spc;
__asm__("stc spc, %0" : "=r"(spc)); __asm__("stc spc, %0" : "=r"(spc));
gdb_handle_single_step(spc, UBC_BREAK_BEFORE); gdb_handle_single_step(spc, UBC_BREAK_BEFORE);
// Break reason
if(code == 0x040 || code == 0x060 || code == 0x0e0 || code == 0x100)
gdb_signal_number = 11; /* SIGSEGV */
if(code == 0x160)
gdb_signal_number = 5; /* SIGTRAP */
if(code == 0x180 || code == 0x1a0)
gdb_signal_number = 4; /* SIGILL */
if(code >= 0x1000 && code != 0x10a0)
gdb_signal_number = 5; /* SIGTRAP */
if(code == 0x10a0)
gdb_signal_number = 7; /* SIGEMT (used here for bad UBC breaks) */
return 0; return 0;
} }
return 1; return 1;