ESP-IDF patch to dump ESP8684 PMP register on panic

esp32c2_panic.patch

diff --git i/components/esp_system/panic.c w/components/esp_system/panic.c
index b0912dacbf5..b78bee4134a 100644
--- i/components/esp_system/panic.c
+++ w/components/esp_system/panic.c
@@ -346,6 +346,66 @@ void esp_panic_handler(panic_info_t *info)
 
     panic_print_str("\r\n");
 
+    // Dump PMP regs, hacky form so compile-time macro expands the immediates
+    uint32_t cfgs[] = {
+        RV_READ_CSR(CSR_PMPCFG0 + 0),
+        RV_READ_CSR(CSR_PMPCFG0 + 1),
+        RV_READ_CSR(CSR_PMPCFG0 + 2),
+        RV_READ_CSR(CSR_PMPCFG0 + 3),
+        //RV_READ_CSR(CSR_PMPCFG0 + 4),
+        //RV_READ_CSR(CSR_PMPCFG0 + 5),
+        //RV_READ_CSR(CSR_PMPCFG0 + 6),
+        //RV_READ_CSR(CSR_PMPCFG0 + 7),
+    };
+    uint32_t addrs[] = {
+        RV_READ_CSR(CSR_PMPADDR0 + 0),
+        RV_READ_CSR(CSR_PMPADDR0 + 1),
+        RV_READ_CSR(CSR_PMPADDR0 + 2),
+        RV_READ_CSR(CSR_PMPADDR0 + 3),
+        RV_READ_CSR(CSR_PMPADDR0 + 4),
+        RV_READ_CSR(CSR_PMPADDR0 + 5),
+        RV_READ_CSR(CSR_PMPADDR0 + 6),
+        RV_READ_CSR(CSR_PMPADDR0 + 7),
+        RV_READ_CSR(CSR_PMPADDR0 + 8),
+        RV_READ_CSR(CSR_PMPADDR0 + 9),
+        RV_READ_CSR(CSR_PMPADDR0 + 10),
+        RV_READ_CSR(CSR_PMPADDR0 + 11),
+        RV_READ_CSR(CSR_PMPADDR0 + 12),
+        RV_READ_CSR(CSR_PMPADDR0 + 13),
+        RV_READ_CSR(CSR_PMPADDR0 + 14),
+        RV_READ_CSR(CSR_PMPADDR0 + 15),
+        //RV_READ_CSR(CSR_PMPADDR0 + 16),
+        //RV_READ_CSR(CSR_PMPADDR0 + 17),
+        //RV_READ_CSR(CSR_PMPADDR0 + 18),
+        //RV_READ_CSR(CSR_PMPADDR0 + 19),
+        //RV_READ_CSR(CSR_PMPADDR0 + 20),
+        //RV_READ_CSR(CSR_PMPADDR0 + 21),
+        //RV_READ_CSR(CSR_PMPADDR0 + 22),
+        //RV_READ_CSR(CSR_PMPADDR0 + 23),
+        //RV_READ_CSR(CSR_PMPADDR0 + 24),
+        //RV_READ_CSR(CSR_PMPADDR0 + 25),
+        //RV_READ_CSR(CSR_PMPADDR0 + 26),
+        //RV_READ_CSR(CSR_PMPADDR0 + 27),
+        //RV_READ_CSR(CSR_PMPADDR0 + 28),
+        //RV_READ_CSR(CSR_PMPADDR0 + 29),
+        //RV_READ_CSR(CSR_PMPADDR0 + 30),
+        //RV_READ_CSR(CSR_PMPADDR0 + 31),
+    };
+    for (int i = 0; i < sizeof(cfgs)/sizeof(uint32_t); i++) {
+        panic_print_str("PMPCFG");
+        panic_print_dec(i);
+        panic_print_str(": ");
+        panic_print_hex(cfgs[i]);
+        panic_print_str("\r\n");
+    }
+    for (int i = 0; i < sizeof(addrs)/sizeof(uint32_t); i++) {
+        panic_print_str("PMPADDR");
+        panic_print_dec(i);
+        panic_print_str(": ");
+        panic_print_hex(addrs[i]);
+        panic_print_str("\r\n");
+    }
+
     // If on-chip-debugger is attached, and system is configured to be aware of this,
     // then only print up to details. Users should be able to probe for the other information
     // in debug mode.