[AFLplusplus/LibAFL] dump registers on OpenBSD amd64 (PR #787)

* dump registers on openbsd

* write_crash implementations

libafl/src/bolts/minibsod.rs

@@ -216,13 +216,42 @@ pub fn dump_registers<W: Write>(
     Ok(())
 }
 
+/// Write the content of all important registers
+#[cfg(all(target_os = "openbsd", target_arch = "x86_64"))]
+#[allow(clippy::similar_names)]
+pub fn dump_registers<W: Write>(
+    writer: &mut BufWriter<W>,
+    ucontext: &ucontext_t,
+) -> Result<(), std::io::Error> {
+    write!(writer, "r8 : {:#016x}, ", ucontext.sc_r8)?;
+    write!(writer, "r9 : {:#016x}, ", ucontext.sc_r9)?;
+    write!(writer, "r10 : {:#016x}, ", ucontext.sc_r10)?;
+    write!(writer, "r11 : {:#016x}, ", ucontext.sc_r11)?;
+    write!(writer, "r12 : {:#016x}, ", ucontext.sc_r12)?;
+    write!(writer, "r13 : {:#016x}, ", ucontext.sc_r13)?;
+    write!(writer, "r14 : {:#016x}, ", ucontext.sc_r14)?;
+    write!(writer, "r15 : {:#016x}, ", ucontext.sc_r15)?;
+    write!(writer, "rdi : {:#016x}, ", ucontext.sc_rdi)?;
+    write!(writer, "rsi : {:#016x}, ", ucontext.sc_rsi)?;
+    write!(writer, "rbp : {:#016x}, ", ucontext.sc_rbp)?;
+    write!(writer, "rbx : {:#016x}, ", ucontext.sc_rbx)?;
+    write!(writer, "rdx : {:#016x}, ", ucontext.sc_rdx)?;
+    write!(writer, "rax : {:#016x}, ", ucontext.sc_rax)?;
+    write!(writer, "rcx : {:#016x}, ", ucontext.sc_rcx)?;
+    write!(writer, "rsp : {:#016x}, ", ucontext.sc_rsp)?;
+    write!(writer, "rflags : {:#016x}, ", ucontext.sc_rflags)?;
+    write!(writer, "cs : {:#016x}, ", ucontext.sc_cs)?;
+    Ok(())
+}
+
 #[allow(clippy::unnecessary_wraps)]
 #[cfg(not(any(
     target_vendor = "apple",
     target_os = "linux",
     target_os = "android",
     target_os = "freebsd",
-    target_os = "netbsd"
+    target_os = "netbsd",
+    target_os = "openbsd"
 )))]
 fn dump_registers<W: Write>(
     writer: &mut BufWriter<W>,
@@ -326,7 +355,45 @@ fn write_crash<W: Write>(
     Ok(())
 }
 
-#[cfg(not(any(target_vendor = "apple", target_os = "linux", target_os = "android")))]
+#[cfg(target_os = "freebsd")]
+#[allow(clippy::similar_names)]
+fn write_crash<W: Write>(
+    writer: &mut BufWriter<W>,
+    signal: Signal,
+    ucontext: &ucontext_t,
+) -> Result<(), std::io::Error> {
+    writeln!(
+        writer,
+        "Received signal {} at{:016x}, fault address: 0x{:016x}",
+        signal, ucontext.uc_mcontext.mc_rip, ucontext.uc_mcontext.mc_fs
+    )?;
+
+    Ok(())
+}
+
+#[cfg(target_os = "openbsd")]
+#[allow(clippy::similar_names)]
+fn write_crash<W: Write>(
+    writer: &mut BufWriter<W>,
+    signal: Signal,
+    ucontext: &ucontext_t,
+) -> Result<(), std::io::Error> {
+    writeln!(
+        writer,
+        "Received signal {} at{:016x}, fault address: 0x{:016x}",
+        signal, ucontext.sc_rip, ucontext.sc_fs
+    )?;
+
+    Ok(())
+}
+
+#[cfg(not(any(
+    target_vendor = "apple",
+    target_os = "linux",
+    target_os = "android",
+    target_os = "freebsd",
+    target_os = "openbsd"
+)))]
 fn write_crash<W: Write>(
     writer: &mut BufWriter<W>,
     signal: Signal,