diff --git a/libc/config/linux/riscv64/entrypoints.txt b/libc/config/linux/riscv64/entrypoints.txt
--- a/libc/config/linux/riscv64/entrypoints.txt
+++ b/libc/config/linux/riscv64/entrypoints.txt
@@ -387,8 +387,8 @@
     # libc.src.sched.__sched_getcpucount
 
     # setjmp.h entrypoints
-    # libc.src.setjmp.longjmp
-    # libc.src.setjmp.setjmp
+    libc.src.setjmp.longjmp
+    libc.src.setjmp.setjmp
 
     # stdio.h entrypoints
     # libc.src.stdio.clearerr
diff --git a/libc/include/llvm-libc-types/jmp_buf.h b/libc/include/llvm-libc-types/jmp_buf.h
--- a/libc/include/llvm-libc-types/jmp_buf.h
+++ b/libc/include/llvm-libc-types/jmp_buf.h
@@ -19,6 +19,19 @@
   __UINT64_TYPE__ r15;
   __UINTPTR_TYPE__ rsp;
   __UINTPTR_TYPE__ rip;
+#elif defined(__riscv)
+  /* Program counter.  */
+  long int __pc;
+  /* Callee-saved registers.  */
+  long int __regs[12];
+  /* Stack pointer.  */
+  long int __sp;
+  /* Callee-saved floating point registers.  */
+#if __riscv_float_abi_double
+  double __fpregs[12];
+#elif defined(__riscv_float_abi_single)
+#error "__jmp_buf not available for your target architecture."
+#endif
 #else
 #error "__jmp_buf not available for your target architecture."
 #endif
diff --git a/libc/src/setjmp/CMakeLists.txt b/libc/src/setjmp/CMakeLists.txt
--- a/libc/src/setjmp/CMakeLists.txt
+++ b/libc/src/setjmp/CMakeLists.txt
@@ -1,3 +1,10 @@
+if(LIBC_TARGET_ARCHITECTURE_IS_RISCV64)
+  set(FRAME_POINTER -fomit-frame-pointer)
+else()
+  # The implementation assumes frame pointer on to the stack
+  set(FRAME_POINTER -fno-omit-frame-pointer)
+endif()
+
 add_entrypoint_object(
   setjmp
   SRCS
@@ -6,7 +13,7 @@
     setjmp_impl.h
   COMPILE_OPTIONS
     -O3 # We do not want any local variables in setjmp
-    -fno-omit-frame-pointer # The implementation assumes frame pointer on to the stack
+    "${FRAME_POINTER}"
   DEPENDS
     libc.include.setjmp
 )
diff --git a/libc/src/setjmp/longjmp.h b/libc/src/setjmp/longjmp.h
--- a/libc/src/setjmp/longjmp.h
+++ b/libc/src/setjmp/longjmp.h
@@ -13,7 +13,7 @@
 
 namespace __llvm_libc {
 
-void longjmp(__jmp_buf *buf, int val);
+void longjmp(__jmp_buf *buf, int val) __NOEXCEPT;
 
 } // namespace __llvm_libc
 
diff --git a/libc/src/setjmp/longjmp.cpp b/libc/src/setjmp/longjmp.cpp
--- a/libc/src/setjmp/longjmp.cpp
+++ b/libc/src/setjmp/longjmp.cpp
@@ -14,7 +14,10 @@
 
 namespace __llvm_libc {
 
-LLVM_LIBC_FUNCTION(void, longjmp, (__jmp_buf * buf, int val)) {
+#if defined(LIBC_TARGET_ARCH_IS_RISCV64)
+__attribute__((naked)) // Don't generate function epilogue and prologue
+#endif
+LLVM_LIBC_FUNCTION(void, longjmp, (__jmp_buf * buf, int val)) __NOEXCEPT {
 #ifdef LIBC_TARGET_ARCH_IS_X86_64
   register __UINT64_TYPE__ rbx __asm__("rbx");
   register __UINT64_TYPE__ rbp __asm__("rbp");
@@ -38,7 +41,76 @@
   LIBC_INLINE_ASM("mov %1, %0\n\t" : "=r"(r15) : "m"(buf->r15) :);
   LIBC_INLINE_ASM("mov %1, %0\n\t" : "=r"(rsp) : "m"(buf->rsp) :);
   LIBC_INLINE_ASM("jmp *%0\n\t" : : "m"(buf->rip));
-#else // LIBC_TARGET_ARCH_IS_X86_64
+#elif defined(LIBC_TARGET_ARCH_IS_RISCV64)
+  register long a0 __asm__("a0");
+  register long a1 __asm__("a1");
+  register long ra __asm__("ra");
+  register long s0 __asm__("s0");
+  register long s1 __asm__("s1");
+  register long s2 __asm__("s2");
+  register long s3 __asm__("s3");
+  register long s4 __asm__("s4");
+  register long s5 __asm__("s5");
+  register long s6 __asm__("s6");
+  register long s7 __asm__("s7");
+  register long s8 __asm__("s8");
+  register long s9 __asm__("s9");
+  register long s10 __asm__("s10");
+  register long s11 __asm__("s11");
+  register long sp __asm__("sp");
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wuninitialized"
+  LIBC_INLINE_ASM("ld %0, 0(%1)\n\t" : "=r"(ra) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 8(%1)\n\t" : "=r"(s0) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 16(%1)\n\t" : "=r"(s1) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 24(%1)\n\t" : "=r"(s2) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 32(%1)\n\t" : "=r"(s3) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 40(%1)\n\t" : "=r"(s4) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 48(%1)\n\t" : "=r"(s5) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 56(%1)\n\t" : "=r"(s6) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 64(%1)\n\t" : "=r"(s7) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 72(%1)\n\t" : "=r"(s8) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 80(%1)\n\t" : "=r"(s9) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 88(%1)\n\t" : "=r"(s10) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 96(%1)\n\t" : "=r"(s11) : "r"(a0) :);
+  LIBC_INLINE_ASM("ld %0, 104(%1)\n\t" : "=r"(sp) : "r"(a0) :);
+
+#if __riscv_float_abi_double
+  register double fs0 __asm__("fs0");
+  register double fs1 __asm__("fs1");
+  register double fs2 __asm__("fs2");
+  register double fs3 __asm__("fs3");
+  register double fs4 __asm__("fs4");
+  register double fs5 __asm__("fs5");
+  register double fs6 __asm__("fs6");
+  register double fs7 __asm__("fs7");
+  register double fs8 __asm__("fs8");
+  register double fs9 __asm__("fs9");
+  register double fs10 __asm__("fs10");
+  register double fs11 __asm__("fs11");
+
+  LIBC_INLINE_ASM("fld %0, 112(%1)\n\t" : "=f"(fs0) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 120(%1)\n\t" : "=f"(fs1) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 128(%1)\n\t" : "=f"(fs2) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 136(%1)\n\t" : "=f"(fs3) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 144(%1)\n\t" : "=f"(fs4) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 152(%1)\n\t" : "=f"(fs5) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 160(%1)\n\t" : "=f"(fs6) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 168(%1)\n\t" : "=f"(fs7) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 176(%1)\n\t" : "=f"(fs8) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 184(%1)\n\t" : "=f"(fs9) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 192(%1)\n\t" : "=f"(fs10) : "r"(a0) :);
+  LIBC_INLINE_ASM("fld %0, 200(%1)\n\t" : "=f"(fs11) : "r"(a0) :);
+#elif defined(__riscv_float_abi_single)
+#error "longjmp implementation not available for the target architecture."
+#endif
+
+  LIBC_INLINE_ASM("seqz %0, %1" : "=r"(a0) : "r"(a1) :);
+  LIBC_INLINE_ASM("add %0, %0, %1" : "=r"(a0) : "r"(a1), "r"(a0) :);
+  LIBC_INLINE_ASM("ret" : : :);
+#pragma GCC diagnostic pop
+#else
 #error "longjmp implementation not available for the target architecture."
 #endif
 }
diff --git a/libc/src/setjmp/setjmp.cpp b/libc/src/setjmp/setjmp.cpp
--- a/libc/src/setjmp/setjmp.cpp
+++ b/libc/src/setjmp/setjmp.cpp
@@ -14,7 +14,10 @@
 
 namespace __llvm_libc {
 
-LLVM_LIBC_FUNCTION(int, setjmp, (__jmp_buf * buf)) {
+#if defined(LIBC_TARGET_ARCH_IS_RISCV64)
+__attribute__((naked)) // Don't generate function epilogue and prologue
+#endif
+LLVM_LIBC_FUNCTION(int, setjmp, (__jmp_buf * buf)) __NOEXCEPT {
 #ifdef LIBC_TARGET_ARCH_IS_X86_64
   register __UINT64_TYPE__ rbx __asm__("rbx");
   register __UINT64_TYPE__ r12 __asm__("r12");
@@ -50,11 +53,76 @@
   buf->rsp = reinterpret_cast<__UINTPTR_TYPE__>(__builtin_frame_address(0)) +
              sizeof(__UINTPTR_TYPE__) * 2;
   buf->rip = reinterpret_cast<__UINTPTR_TYPE__>(__builtin_return_address(0));
-#else // LIBC_TARGET_ARCH_IS_X86_64
+  return 0;
+#elif defined(LIBC_TARGET_ARCH_IS_RISCV64)
+  register long a0 __asm__("a0");
+  register long ra __asm__("ra");
+  register long s0 __asm__("s0");
+  register long s1 __asm__("s1");
+  register long s2 __asm__("s2");
+  register long s3 __asm__("s3");
+  register long s4 __asm__("s4");
+  register long s5 __asm__("s5");
+  register long s6 __asm__("s6");
+  register long s7 __asm__("s7");
+  register long s8 __asm__("s8");
+  register long s9 __asm__("s9");
+  register long s10 __asm__("s10");
+  register long s11 __asm__("s11");
+  register long sp __asm__("sp");
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wuninitialized"
+  LIBC_INLINE_ASM("sd %0, 0(%1)\n\t" : "=r"(ra) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 8(%1)\n\t" : "=r"(s0) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 16(%1)\n\t" : "=r"(s1) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 24(%1)\n\t" : "=r"(s2) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 32(%1)\n\t" : "=r"(s3) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 40(%1)\n\t" : "=r"(s4) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 48(%1)\n\t" : "=r"(s5) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 56(%1)\n\t" : "=r"(s6) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 64(%1)\n\t" : "=r"(s7) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 72(%1)\n\t" : "=r"(s8) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 80(%1)\n\t" : "=r"(s9) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 88(%1)\n\t" : "=r"(s10) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 96(%1)\n\t" : "=r"(s11) : "r"(a0) :);
+  LIBC_INLINE_ASM("sd %0, 104(%1)\n\t" : "=r"(sp) : "r"(a0) :);
+
+#if __riscv_float_abi_double
+  register double fs0 __asm__("fs0");
+  register double fs1 __asm__("fs1");
+  register double fs2 __asm__("fs2");
+  register double fs3 __asm__("fs3");
+  register double fs4 __asm__("fs4");
+  register double fs5 __asm__("fs5");
+  register double fs6 __asm__("fs6");
+  register double fs7 __asm__("fs7");
+  register double fs8 __asm__("fs8");
+  register double fs9 __asm__("fs9");
+  register double fs10 __asm__("fs10");
+  register double fs11 __asm__("fs11");
+
+  LIBC_INLINE_ASM("fsd %0, 112(%1)\n\t" : "=f"(fs0) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 120(%1)\n\t" : "=f"(fs1) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 128(%1)\n\t" : "=f"(fs2) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 136(%1)\n\t" : "=f"(fs3) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 144(%1)\n\t" : "=f"(fs4) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 152(%1)\n\t" : "=f"(fs5) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 160(%1)\n\t" : "=f"(fs6) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 168(%1)\n\t" : "=f"(fs7) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 176(%1)\n\t" : "=f"(fs8) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 184(%1)\n\t" : "=f"(fs9) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 192(%1)\n\t" : "=f"(fs10) : "r"(a0) :);
+  LIBC_INLINE_ASM("fsd %0, 200(%1)\n\t" : "=f"(fs11) : "r"(a0) :);
+#elif defined(__riscv_float_abi_single)
 #error "setjmp implementation not available for the target architecture."
 #endif
 
-  return 0;
+  LIBC_INLINE_ASM("li %0, 0" : "=r"(a0) : :);
+#pragma GCC diagnostic pop
+#else
+#error "setjmp implementation not available for the target architecture."
+#endif
 }
 
 } // namespace __llvm_libc
diff --git a/libc/src/setjmp/setjmp_impl.h b/libc/src/setjmp/setjmp_impl.h
--- a/libc/src/setjmp/setjmp_impl.h
+++ b/libc/src/setjmp/setjmp_impl.h
@@ -15,7 +15,7 @@
 
 namespace __llvm_libc {
 
-int setjmp(__jmp_buf *buf);
+int setjmp(__jmp_buf *buf) __NOEXCEPT;
 
 } // namespace __llvm_libc