[yaml2obj] Align section content using AddressAlign field's value

Use AddressAlign field's value to properly align sections content in the
yaml2obj tool. Before this change the yaml2obj ignored AddressAlign and
always aligned section on 16 bytes boundary.

llvm-svn: 241674

1 files changed, 53 insertions, 0 deletions

diff --git a/llvm/test/Object/yaml2obj-elf-alignment.yaml b/llvm/test/Object/yaml2obj-elf-alignment.yaml
new file mode 100644
index 00000000000..8f2f985177f
--- /dev/null
+++ b/llvm/test/Object/yaml2obj-elf-alignment.yaml
@@ -0,0 +1,53 @@
+# Check that yaml2obj takes in account section AddressAlign field.
+
+# RUN: yaml2obj -format=elf %s > %t
+# RUN: llvm-readobj -s %t | FileCheck %s
+
+# CHECK:      Section {
+# CHECK:        Index: 2
+# CHECK-NEXT:   Name: .data
+# CHECK-NEXT:   Type: SHT_PROGBITS
+# CHECK-NEXT:   Flags [
+# CHECK-NEXT:     SHF_ALLOC
+# CHECK-NEXT:     SHF_WRITE
+# CHECK-NEXT:   ]
+# CHECK-NEXT:   Address: 0x0
+# CHECK-NEXT:   Offset: 0x{{[0-9A-F]*}}00
+# CHECK-NEXT:   Size: 4
+# CHECK-NEXT:   Link: 0
+# CHECK-NEXT:   Info: 0
+# CHECK-NEXT:   AddressAlignment: 256
+# CHECK-NEXT:   EntrySize: 0
+# CHECK-NEXT: }
+
+---
+FileHeader:
+  Class:    ELFCLASS32
+  Data:     ELFDATA2LSB
+  Type:     ET_REL
+  Machine:  EM_MIPS
+  Flags:    [ EF_MIPS_CPIC, EF_MIPS_ABI_O32, EF_MIPS_ARCH_32 ]
+
+Sections:
+  - Name:          .text
+    Type:          SHT_PROGBITS
+    Flags:         [ SHF_ALLOC, SHF_EXECINSTR ]
+    AddressAlign:  8
+    Size:          4
+  - Name:          .data
+    Type:          SHT_PROGBITS
+    Flags:         [ SHF_WRITE, SHF_ALLOC ]
+    AddressAlign:  256
+    Size:          4
+
+Symbols:
+  Global:
+    - Name:     T0
+      Type:     STT_FUNC
+      Section:  .text
+      Size:     4
+    - Name:     D0
+      Type:     STT_OBJECT
+      Section:  .data
+      Size:     4
+...