crash-handler: add riscv64 support

Author: hack3ric

crash-handler/src/linux/jmp.rs

@@ -37,6 +37,16 @@ cfg_if::cfg_if! {
         #[doc(hidden)]
         #[allow(non_camel_case_types)]
         pub struct __jmp_buf([u64; 22]);
+    } else if #[cfg(target_arch = "riscv64")] {
+        #[repr(C)]
+        #[doc(hidden)]
+        #[allow(non_camel_case_types)]
+        pub struct __jmp_buf {
+            __pc: u64,
+            __regs: [u64; 12],
+            __sp: u64,
+            __fpregs: [f64; 12],
+        }
     }
 }
 

crash-handler/src/linux/state.rs

@@ -457,6 +457,8 @@ impl HandlerInner {
                         if (*fp_ptr).head.magic == crash_context::FPSIMD_MAGIC {
                             ptr::copy_nonoverlapping(fp_ptr, &mut cc.float_state, 1);
                         }
+                    } else if #[cfg(target_arch = "riscv64")] {
+                        cc.float_state = uc_ptr.uc_mcontext.__fpregs;
                     } else if #[cfg(not(target_arch = "arm"))] {
                         if !uc_ptr.uc_mcontext.fpregs.is_null() {
                             ptr::copy_nonoverlapping(uc_ptr.uc_mcontext.fpregs, ((&mut cc.float_state) as *mut crash_context::fpregset_t).cast(), 1);