1 files changed, 38 insertions, 0 deletions
diff --git a/llvm/test/tools/llvm-objcopy/ELF/compress-sections-within-segment.s b/llvm/test/tools/llvm-objcopy/ELF/compress-sections-within-segment.s
new file mode 100644
index 000000000000..064ffcadc12e
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/ELF/compress-sections-within-segment.s
@@ -0,0 +1,38 @@
+## Disallow (de)compression for sections within a segment as they are
+## effectively immutable.
+# RUN: rm -rf %t && mkdir %t && cd %t
+# RUN: yaml2obj %s -o a
+# RUN: not llvm-objcopy a /dev/null --compress-sections .text=zlib 2>&1 | FileCheck %s --implicit-check-not=error:
+
+# CHECK: error: 'a': section '.text' within a segment cannot be (de)compressed
+
+# RUN: not llvm-objcopy a /dev/null --compress-sections foo=none 2>&1 | FileCheck %s --check-prefix=CHECK2 --implicit-check-not=error:
+
+# CHECK2: error: 'a': section 'foo' within a segment cannot be (de)compressed
+
+## There is an error even if 'foo' is already compressed with zlib.
+# RUN: not llvm-objcopy a /dev/null --compress-sections foo=zlib 2>&1 | FileCheck %s --check-prefix=CHECK3 --implicit-check-not=error:
+
+# CHECK3: error: 'a': section 'foo' within a segment cannot be (de)compressed
+
+--- !ELF
+FileHeader:
+  Class:      ELFCLASS64
+  Data:       ELFDATA2LSB
+  Type:       ET_EXEC
+  Machine:    EM_X86_64
+ProgramHeaders:
+  - Type:     PT_LOAD
+    FirstSec: .text
+    LastSec:  foo
+    Align:    0x1000
+    Offset:   0x1000
+Sections:
+  - Name:     .text
+    Type:     SHT_PROGBITS
+    Offset:   0x1000
+    Content:  C3
+  - Name:     foo
+    Type:     SHT_PROGBITS
+    Flags:    [ SHF_COMPRESSED ]
+    Content:  010000000000000040000000000000000100000000000000789cd36280002d3269002f800151