[Object] Add ELF section type for offloading objects

Currently we use the `.llvm.offloading` section to store device-side
objects inside the host, creating a fat binary. The contents of these
sections is currently determined by the name of the section while it
should ideally be determined by its type. This patch adds the new
`SHT_LLVM_OFFLOADING` section type to the ELF section types. Which
should make it easier to identify this specific data format.

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D129052

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/test/ObjectYAML/ELF/sht-offloading.yaml b/llvm/test/ObjectYAML/ELF/sht-offloading.yaml
new file mode 100644
index 0000000..b234b96
--- /dev/null
+++ b/llvm/test/ObjectYAML/ELF/sht-offloading.yaml
@@ -0,0 +1,28 @@
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-readobj --sections %t | FileCheck -check-prefix=OBJ %s
+# RUN: obj2yaml %t | FileCheck -check-prefix=YAML %s
+
+--- !ELF
+FileHeader:
+  Class:           ELFCLASS32
+  Data:            ELFDATA2LSB
+  Type:            ET_REL
+Sections:
+  - Name:            .llvm.offloading
+    Type:            SHT_LLVM_OFFLOADING
+    Flags:           [ SHF_EXCLUDE ]
+
+#      OBJ: Sections [
+#      OBJ:   Section {
+#      OBJ:     Index: 1
+# OBJ-NEXT:     Name: .llvm.offloading (1)
+# OBJ-NEXT:     Type: SHT_LLVM_OFFLOADING (0x6FFF4C0B)
+# OBJ-NEXT:     Flags [ (0x80000000)
+# OBJ-NEXT:       SHF_EXCLUDE (0x80000000)
+# OBJ-NEXT:     ]
+
+
+#      YAML: Sections:
+# YAML-NEXT:   - Name:            .llvm.offloading
+# YAML-NEXT:     Type:            SHT_LLVM_OFFLOADING
+# YAML-NEXT:     Flags:           [ SHF_EXCLUDE ]