feat: add lab-rv32i-freertos-isr-drivers card

scripts/check_abi.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env sh
+set -e
+nm=$RISCV_NM
+readelf=$RISCV_READELF
+if [ -z "$nm" ]; then nm=riscv64-unknown-elf-nm; fi
+if [ -z "$readelf" ]; then readelf=riscv64-unknown-elf-readelf; fi
+elf=build/task01_isr_drivers/prog.elf
+if "$nm" -C -u "$elf" | grep -Eq '__cxa_|_Unwind_|std::|libstdc\+\+'; then echo "hosted C++ runtime dependency" >&2; exit 1; fi
+if "$nm" -C --defined-only "$elf" | grep -Eq 'vtable for|typeinfo for|typeinfo name for'; then echo "virtual/RTTI metadata" >&2; exit 1; fi
+if "$readelf" -S "$elf" | grep -Eq '\.init_array|\.eh_frame|\.gcc_except_table'; then echo "initializer/exception/unwind section" >&2; exit 1; fi
+for symbol in freertos_risc_v_application_interrupt_handler isr_drivers_debug_checkpoint g_mcause g_rx_queued g_rx_dropped g_isr_yield_calls g_isr_drivers_pass; do
+  if ! "$nm" --defined-only "$elf" | grep -Fq "$symbol"; then echo "missing evidence: $symbol" >&2; exit 1; fi
+done
+for symbol in g_uart_registers g_gpio_registers g_rx_queue_control g_rx_queue_storage g_receiver_tcb g_receiver_stack; do
+  if ! "$nm" -C --defined-only "$elf" | grep -E "[[:space:]][bB][[:space:]].*$symbol" >/dev/null; then
+    echo "static ISR storage is not in .bss: $symbol" >&2; exit 1
+  fi
+done
+echo "PASS ABI: MMIO model, queue and task storage in .bss; no C++ runtime"