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Refactor fault handling.

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This commit is contained in:
Brad Nelson
2023-01-14 22:28:38 -08:00
parent f8cfaedc84
commit 2f79192ea0
9 changed files with 110 additions and 79 deletions
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71
common/interp.h
View File

@ -12,43 +12,10 @@
// See the License for the specific language governing permissions and
// limitations under the License.
#if defined(HAS_SIGNALS) || defined(ENABLE_ESP32_FORTH_FAULT_HANDLING)
# include <setjmp.h>
#endif
#if defined(HAS_SIGNALS)
# include <signal.h>
#endif
#define JMPW goto **(void **) w
#define NEXT w = *ip++; JMPW
#define ADDROF(x) (&& OP_ ## x)
#if defined(HAS_SIGNALS) || defined(ENABLE_ESP32_FORTH_FAULT_HANDLING)
static __thread jmp_buf g_forth_fault;
static __thread int g_forth_signal;
#endif
#if defined(HAS_SIGNALS)
static void forth_signal_handler(int sig) {
g_forth_signal = sig;
sigset_t ss;
sigemptyset(&ss);
sigprocmask(SIG_SETMASK, &ss, 0);
longjmp(g_forth_fault, 1);
}
#endif
#if defined(ENABLE_ESP32_FORTH_FAULT_HANDLING)
# include "soc/soc.h"
# include <xtensa/xtensa_api.h>
static __thread uint32_t g_forth_setlevel;
static void IRAM_ATTR forth_exception_handler(XtExcFrame *frame) {
g_forth_signal = frame->exccause;
XTOS_RESTORE_INTLEVEL(g_forth_setlevel);
longjmp(g_forth_fault, 1);
}
#endif
static cell_t *forth_run(cell_t *init_rp) {
static const BUILTIN_WORD builtins[] = {
#define Z(flags, name, op, code) \
@ -65,46 +32,12 @@ static cell_t *forth_run(cell_t *init_rp) {
if (!init_rp) {
g_sys->DOCREATE_OP = ADDROF(DOCREATE);
g_sys->builtins = builtins;
#if defined(HAS_SIGNALS)
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = forth_signal_handler;
sigaction(SIGSEGV, &sa, 0);
sigaction(SIGBUS, &sa, 0);
sigaction(SIGINT, &sa, 0);
sigaction(SIGFPE, &sa, 0);
#endif
#if defined(ENABLE_ESP32_FORTH_FAULT_HANDLING)
xt_set_exception_handler(EXCCAUSE_LOAD_STORE_ERROR, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_PRIVILEGED, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_UNALIGNED, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_DIVIDE_BY_ZERO, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_INSTR_ERROR, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_ILLEGAL, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_LOAD_PROHIBITED, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_STORE_PROHIBITED, forth_exception_handler);
xt_set_exception_handler(EXCCAUSE_INSTR_PROHIBITED, forth_exception_handler);
uint32_t default_setlevel = XTOS_SET_INTLEVEL(XCHAL_EXCM_LEVEL);
XTOS_RESTORE_INTLEVEL(default_setlevel);
g_forth_setlevel = default_setlevel;
#endif
forth_faults_setup();
return 0;
}
register cell_t *ip, *rp, *sp, tos, w;
register float *fp, ft;
rp = init_rp; UNPARK;
#if defined(HAS_SIGNALS) || defined(ENABLE_ESP32_FORTH_FAULT_HANDLING)
if (setjmp(g_forth_fault)) {
rp = *g_sys->throw_handler;
*g_sys->throw_handler = (cell_t *) *rp--;
sp = (cell_t *) *rp--;
fp = (float *) *rp--;
ip = (cell_t *) *rp--;
--sp;
tos = -g_forth_signal;
}
#endif
NEXT;
rp = init_rp; UNPARK; FAULT_ENTRY; NEXT;
#define Z(flags, name, op, code) OP_ ## op: { code; } NEXT;
PLATFORM_OPCODE_LIST
TIER2_OPCODE_LIST

3
common/tier0_opcodes.h
View File

@ -34,6 +34,9 @@ typedef uintptr_t ucell_t;
#define PARK DUP; *++rp = (cell_t) fp; *++rp = (cell_t) sp; *++rp = (cell_t) ip
#define UNPARK ip = (cell_t *) *rp--; sp = (cell_t *) *rp--; fp = (float *) *rp--; DROP
#define THROWIT(n) rp = *g_sys->throw_handler; *g_sys->throw_handler = (cell_t *) *rp--; \
sp = (cell_t *) *rp--; fp = (float *) *rp--; ip = (cell_t *) *rp--; \
NIP; tos = (n);
#define TOFLAGS(xt) ((uint8_t *) (((cell_t *) (xt)) - 1))
#define TONAMELEN(xt) (TOFLAGS(xt) + 1)