1 files changed, 88 insertions, 0 deletions
diff --git a/backend/tools/AssemblyEmitter/ObjectPipelineTest.cmake b/backend/tools/AssemblyEmitter/ObjectPipelineTest.cmake
new file mode 100644
index 0000000..5ba800c
--- /dev/null
+++ b/backend/tools/AssemblyEmitter/ObjectPipelineTest.cmake
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+if(NOT DEFINED EMITTER OR NOT DEFINED INPUT OR NOT DEFINED OUTPUT)
+  message(FATAL_ERROR "object pipeline test is missing a required path")
+endif()
+
+set(RepeatedOutput "${OUTPUT}.repeat")
+execute_process(
+  COMMAND "${EMITTER}" --input "${INPUT}" --filetype obj --output "${OUTPUT}"
+  RESULT_VARIABLE FirstResult
+  ERROR_VARIABLE FirstDiagnostics
+)
+if(NOT FirstResult EQUAL 0)
+  message(FATAL_ERROR "object pipeline failed: ${FirstDiagnostics}")
+endif()
+
+execute_process(
+  COMMAND "${EMITTER}" --input "${INPUT}" --filetype obj --output "${RepeatedOutput}"
+  RESULT_VARIABLE SecondResult
+  ERROR_VARIABLE SecondDiagnostics
+)
+if(NOT SecondResult EQUAL 0)
+  message(FATAL_ERROR "repeated object pipeline failed: ${SecondDiagnostics}")
+endif()
+
+execute_process(
+  COMMAND "${CMAKE_COMMAND}" -E compare_files "${OUTPUT}" "${RepeatedOutput}"
+  RESULT_VARIABLE ComparisonResult
+)
+if(NOT ComparisonResult EQUAL 0)
+  message(FATAL_ERROR "object pipeline output is not deterministic")
+endif()
+
+file(READ "${OUTPUT}" ObjectMagic OFFSET 0 LIMIT 4 HEX)
+if(NOT ObjectMagic STREQUAL "7f454c46")
+  message(FATAL_ERROR "object pipeline did not produce an ELF file")
+endif()
+
+if(DEFINED LLVM_READELF AND NOT LLVM_READELF STREQUAL "LLVM_READELF-NOTFOUND" AND
+   NOT LLVM_READELF STREQUAL "")
+  execute_process(
+    COMMAND "${LLVM_READELF}" -h -S -s -r "${OUTPUT}"
+    RESULT_VARIABLE ReadELFResult
+    OUTPUT_VARIABLE ReadELFOutput
+    ERROR_VARIABLE ReadELFDiagnostics
+  )
+  if(NOT ReadELFResult EQUAL 0)
+    message(FATAL_ERROR "LLVM readelf rejected generated object: ${ReadELFDiagnostics}")
+  endif()
+  if(NOT ReadELFOutput MATCHES "Type:[ \t]+REL" OR
+     NOT ReadELFOutput MATCHES "Machine:[ \t]+RISC-V" OR
+     NOT ReadELFOutput MATCHES "Flags:[ \t]+0x5" OR
+     NOT ReadELFOutput MATCHES "\\.text" OR
+     NOT ReadELFOutput MATCHES "\\.eh_frame" OR
+     NOT ReadELFOutput MATCHES "\\.riscv\\.attributes")
+    message(FATAL_ERROR "generated object is missing required RV64GC ELF metadata")
+  endif()
+  if(INPUT MATCHES "RISCVDataPipeline" AND
+     (NOT ReadELFOutput MATCHES "\\.rodata" OR
+      NOT ReadELFOutput MATCHES "\\.rela\\.text" OR
+      NOT ReadELFOutput MATCHES "R_RISCV_64"))
+    message(FATAL_ERROR "data pipeline object is missing data or relocation sections")
+  endif()
+endif()
+
+if(DEFINED LLVM_OBJDUMP AND NOT LLVM_OBJDUMP STREQUAL "LLVM_OBJDUMP-NOTFOUND" AND
+   NOT LLVM_OBJDUMP STREQUAL "")
+  execute_process(
+    COMMAND "${LLVM_OBJDUMP}" -dr --no-show-raw-insn "${OUTPUT}"
+    RESULT_VARIABLE ObjdumpResult
+    OUTPUT_VARIABLE ObjdumpOutput
+    ERROR_VARIABLE ObjdumpDiagnostics
+  )
+  if(NOT ObjdumpResult EQUAL 0)
+    message(FATAL_ERROR "LLVM objdump rejected generated object: ${ObjdumpDiagnostics}")
+  endif()
+  if(NOT ObjdumpOutput MATCHES "file format elf64-littleriscv" OR
+     NOT ObjdumpOutput MATCHES "ret")
+    message(FATAL_ERROR "generated object does not contain RV64GC function code")
+  endif()
+  if(INPUT MATCHES "RISCVStackFramePipeline" AND
+     (NOT ObjdumpOutput MATCHES "addi[ \t]+sp, sp, -0x20" OR
+      NOT ObjdumpOutput MATCHES "addi[ \t]+sp, sp, 0x20"))
+    message(FATAL_ERROR "stack-frame object does not balance its stack pointer")
+  endif()
+endif()
+
+file(REMOVE "${OUTPUT}" "${RepeatedOutput}")