diff --git a/riscv-elf.adoc b/riscv-elf.adoc
index 427489b4..fb4426e0 100644
--- a/riscv-elf.adoc
+++ b/riscv-elf.adoc
@@ -447,7 +447,11 @@ Description:: Additional information about the relocation
                                             <| `ifunc_resolver(B + A)`
 .2+| 59      .2+| PLT32         .2+| Static  | _word32_          .2+| 32-bit relative offset to a function or its PLT entry
                                             <| S + A - P
-.2+| 60-191  .2+| *Reserved*                          .2+| -       |                   .2+| Reserved for future standard use
+.2+| 60      .2+| SET_ULEB128   .2+| Static  | _ULEB128_         .2+| Local label assignment
+                                            <| S + A
+.2+| 61      .2+| SUB_ULEB128   .2+| Static  | _ULEB128_         .2+| Local label subtraction
+                                            <| V - S + A
+.2+| 62-191  .2+| *Reserved*                          .2+| -       |                   .2+| Reserved for future standard use
                                             <|
 .2+| 192-255 .2+| *Reserved*                          .2+| -       |                   .2+| Reserved for nonstandard ABI extensions
                                             <|
@@ -501,6 +505,7 @@ of the `__global_pointer$` symbol into register `gp` (aka `x3`).
 | _word16_    | Specifies a 16-bit word
 | _word32_    | Specifies a 32-bit word
 | _word64_    | Specifies a 64-bit word
+| _ULEB128_   | Specifies a variable-length data encoded in ULEB128 format.
 | _wordclass_ | Specifies a _word32_ field for ILP32 or a _word64_ field for LP64
 | _B-Type_    | Specifies a field as the immediate field in a B-type instruction
 | _CB-Type_   | Specifies a field as the immediate field in a CB-type instruction
@@ -1175,6 +1180,12 @@ are commonly resolved at compile-time, such as intra-function jumps), code
 generators must in general ensure that relocations are always emitted when
 relaxation is enabled.
 
+Linker should adjust relocations which refer to those symbol has updated the
+address.
+
+ULEB128 value with relocation must be padding to the same length even if the
+data can be encoded with a shorter byte sequence after linker relaxation.
+
 === Linker Relaxation Types
 
 The purpose of this section is to describe all types of linker relaxation,