Basic SuperH support (gimli-rs#762)

Author: sozud

src/common.rs

@@ -35,6 +35,7 @@ pub enum Architecture {
     Sparc,
     Sparc32Plus,
     Sparc64,
+    SuperH,
     Wasm32,
     Wasm64,
     Xtensa,
@@ -87,6 +88,7 @@ impl Architecture {
             Architecture::Wasm32 => Some(AddressSize::U32),
             Architecture::Wasm64 => Some(AddressSize::U64),
             Architecture::Xtensa => Some(AddressSize::U32),
+            Architecture::SuperH => Some(AddressSize::U32),
         }
     }
 }

src/read/elf/file.rs

@@ -279,6 +279,7 @@ where
             (elf::EM_SPARC32PLUS, false) => Architecture::Sparc32Plus,
             (elf::EM_SPARCV9, true) => Architecture::Sparc64,
             (elf::EM_XTENSA, false) => Architecture::Xtensa,
+            (elf::EM_SH, false) => Architecture::SuperH,
             _ => Architecture::Unknown,
         }
     }

src/read/elf/relocation.rs

@@ -434,6 +434,11 @@ fn parse_relocation<Elf: FileHeader>(
             elf::R_SPARC_64 | elf::R_SPARC_UA64 => (K::Absolute, g, 64),
             _ => unknown,
         },
+        elf::EM_SH => match r_type {
+            elf::R_SH_DIR32 => (K::Absolute, g, 32),
+            elf::R_SH_REL32 => (K::Relative, g, 32),
+            _ => unknown,
+        },
         elf::EM_XTENSA => match r_type {
             elf::R_XTENSA_32 => (K::Absolute, g, 32),
             elf::R_XTENSA_32_PCREL => (K::Relative, g, 32),

src/write/elf/object.rs

@@ -150,6 +150,7 @@ impl<'a> Object<'a> {
             Architecture::Sparc => true,
             Architecture::Sparc32Plus => true,
             Architecture::Sparc64 => true,
+            Architecture::SuperH => false,
             Architecture::Xtensa => true,
             _ => {
                 return Err(Error(format!(
@@ -364,6 +365,11 @@ impl<'a> Object<'a> {
                 (K::Absolute, _, 64) => elf::R_SPARC_UA64,
                 _ => return unsupported_reloc(),
             },
+            Architecture::SuperH => match (kind, encoding, size) {
+                (K::Absolute, _, 32) => elf::R_SH_DIR32,
+                (K::Relative, _, 32) => elf::R_SH_REL32,
+                _ => return unsupported_reloc(),
+            },
             Architecture::Xtensa => match (kind, encoding, size) {
                 (K::Absolute, _, 32) => elf::R_XTENSA_32,
                 (K::Relative, E::Generic, 32) => elf::R_XTENSA_32_PCREL,
@@ -582,6 +588,7 @@ impl<'a> Object<'a> {
             (Architecture::Sparc, None) => elf::EM_SPARC,
             (Architecture::Sparc32Plus, None) => elf::EM_SPARC32PLUS,
             (Architecture::Sparc64, None) => elf::EM_SPARCV9,
+            (Architecture::SuperH, None) => elf::EM_SH,
             (Architecture::Xtensa, None) => elf::EM_XTENSA,
             _ => {
                 return Err(Error(format!(

tests/round_trip/mod.rs

@@ -286,6 +286,7 @@ fn elf_any() {
         (Architecture::Sparc, Endianness::Big),
         (Architecture::Sparc32Plus, Endianness::Big),
         (Architecture::Sparc64, Endianness::Big),
+        (Architecture::SuperH, Endianness::Big),
         (Architecture::Xtensa, Endianness::Little),
     ]
     .iter()