Auto merge of #3166 - kxxt:riscv64gc-userregs, r=JohnTitor

Add user_regs_struct for riscv32/64

Copied from C header: https://elixir.bootlin.com/linux/latest/source/arch/riscv/include/uapi/asm/ptrace.h

Author: bors

src/unix/linux_like/linux/gnu/b32/riscv32/mod.rs

@@ -196,6 +196,41 @@ s! {
         pub l_len: ::off64_t,
         pub l_pid: ::pid_t,
     }
+
+    pub struct user_regs_struct {
+        pub pc: ::c_ulong,
+        pub ra: ::c_ulong,
+        pub sp: ::c_ulong,
+        pub gp: ::c_ulong,
+        pub tp: ::c_ulong,
+        pub t0: ::c_ulong,
+        pub t1: ::c_ulong,
+        pub t2: ::c_ulong,
+        pub s0: ::c_ulong,
+        pub s1: ::c_ulong,
+        pub a0: ::c_ulong,
+        pub a1: ::c_ulong,
+        pub a2: ::c_ulong,
+        pub a3: ::c_ulong,
+        pub a4: ::c_ulong,
+        pub a5: ::c_ulong,
+        pub a6: ::c_ulong,
+        pub a7: ::c_ulong,
+        pub s2: ::c_ulong,
+        pub s3: ::c_ulong,
+        pub s4: ::c_ulong,
+        pub s5: ::c_ulong,
+        pub s6: ::c_ulong,
+        pub s7: ::c_ulong,
+        pub s8: ::c_ulong,
+        pub s9: ::c_ulong,
+        pub s10: ::c_ulong,
+        pub s11: ::c_ulong,
+        pub t3: ::c_ulong,
+        pub t4: ::c_ulong,
+        pub t5: ::c_ulong,
+        pub t6: ::c_ulong,
+    }
 }
 
 pub const O_LARGEFILE: ::c_int = 0;

src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs

@@ -192,6 +192,41 @@ s! {
         pub l_len: ::off64_t,
         pub l_pid: ::pid_t,
     }
+
+    pub struct user_regs_struct {
+        pub pc: ::c_ulong,
+        pub ra: ::c_ulong,
+        pub sp: ::c_ulong,
+        pub gp: ::c_ulong,
+        pub tp: ::c_ulong,
+        pub t0: ::c_ulong,
+        pub t1: ::c_ulong,
+        pub t2: ::c_ulong,
+        pub s0: ::c_ulong,
+        pub s1: ::c_ulong,
+        pub a0: ::c_ulong,
+        pub a1: ::c_ulong,
+        pub a2: ::c_ulong,
+        pub a3: ::c_ulong,
+        pub a4: ::c_ulong,
+        pub a5: ::c_ulong,
+        pub a6: ::c_ulong,
+        pub a7: ::c_ulong,
+        pub s2: ::c_ulong,
+        pub s3: ::c_ulong,
+        pub s4: ::c_ulong,
+        pub s5: ::c_ulong,
+        pub s6: ::c_ulong,
+        pub s7: ::c_ulong,
+        pub s8: ::c_ulong,
+        pub s9: ::c_ulong,
+        pub s10: ::c_ulong,
+        pub s11: ::c_ulong,
+        pub t3: ::c_ulong,
+        pub t4: ::c_ulong,
+        pub t5: ::c_ulong,
+        pub t6: ::c_ulong,
+    }
 }
 
 pub const POSIX_FADV_DONTNEED: ::c_int = 4;