feat: add lab-rv32i-c-smalloc-sbrk-libc card

2026-07-21 19:14:20 +02:00
commit d522c15f75
33 changed files with 5965 additions and 0 deletions
@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+nm_tool="${RISCV_PREFIX:-riscv64-unknown-elf-}nm"
+readelf_tool="${RISCV_PREFIX:-riscv64-unknown-elf-}readelf"
+
+symbol_value() {
+  "$nm_tool" -n "$1" | awk -v wanted="$2" '$3 == wanted { print $1; exit }'
+}
+
+for task in \
+  task01_libc_without_heap \
+  task03_bounded_sbrk \
+  task04_smalloc \
+  task05_picolibc_malloc; do
+  elf="$root/build/$task/prog.elf"
+  start_hex="$(symbol_value "$elf" __heap_start)"
+  end_hex="$(symbol_value "$elf" __heap_end)"
+  stack_bottom_hex="$(symbol_value "$elf" __stack_bottom)"
+  reset_hex="$(symbol_value "$elf" .reset_handler)"
+  [[ -n "$start_hex" && -n "$end_hex" && -n "$stack_bottom_hex" ]]
+  [[ "$reset_hex" == "80000040" ]]
+  (( 16#$start_hex <= 16#$end_hex ))
+  (( 16#$end_hex == 16#$stack_bottom_hex ))
+  (( (16#$start_hex & 15) == 0 ))
+  (( (16#$end_hex & 15) == 0 ))
+  "$readelf_tool" -h "$elf" | grep -q 'Class:.*ELF32'
+  if "$readelf_tool" -lW "$elf" | grep -Eq 'LOAD.*RWE'; then
+    echo "FAIL $task: writable and executable LOAD segment" >&2
+    exit 1
+  fi
+done
+
+task05="$root/build/task05_picolibc_malloc/prog.elf"
+for symbol in _sbrk sbrk malloc free __heap_start __heap_end; do
+  [[ -n "$(symbol_value "$task05" "$symbol")" ]]
+done
+
+printf '%s\n' \
+  'PASS linker: reset=0x80000040; bounded aligned heap; no RWX LOAD segment' \
+  'PASS Task05 ELF: vendor _sbrk and picolibc sbrk coexist'