From ef4bb4e37490b7441657d8e8e36feb885144772e Mon Sep 17 00:00:00 2001
From: michalbiesek <michalbiesek@gmail.com>
Date: Tue, 27 Jun 2023 10:53:42 +0200
Subject: [PATCH] Add RISC-V debug support (#12349)

- Add support for `getAndSetMcontextEip`
- Add support for `logRegisters`
---
 src/debug.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/src/debug.c b/src/debug.c
index b1b54b5e1..a85605e20 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -1218,6 +1218,8 @@ static void* getAndSetMcontextEip(ucontext_t *uc, void *eip) {
     GET_SET_RETURN(uc->uc_mcontext.gregs[16], eip);
     #elif defined(__ia64__) /* Linux IA64 */
     GET_SET_RETURN(uc->uc_mcontext.sc_ip, eip);
+    #elif defined(__riscv) /* Linux RISC-V */
+    GET_SET_RETURN(uc->uc_mcontext.__gregs[REG_PC], eip);
     #elif defined(__arm__) /* Linux ARM */
     GET_SET_RETURN(uc->uc_mcontext.arm_pc, eip);
     #elif defined(__aarch64__) /* Linux AArch64 */
@@ -1452,6 +1454,49 @@ void logRegisters(ucontext_t *uc) {
         (unsigned long) uc->uc_mcontext.gregs[18]
     );
     logStackContent((void**)uc->uc_mcontext.gregs[15]);
+    #elif defined(__riscv) /* Linux RISC-V */
+    serverLog(LL_WARNING,
+	"\n"
+    "ra:%016lx gp:%016lx\ntp:%016lx t0:%016lx\n"
+    "t1:%016lx t2:%016lx\ns0:%016lx s1:%016lx\n"
+    "a0:%016lx a1:%016lx\na2:%016lx a3:%016lx\n"
+    "a4:%016lx a5:%016lx\na6:%016lx a7:%016lx\n"
+    "s2:%016lx s3:%016lx\ns4:%016lx s5:%016lx\n"
+    "s6:%016lx s7:%016lx\ns8:%016lx s9:%016lx\n"
+    "s10:%016lx s11:%016lx\nt3:%016lx t4:%016lx\n"
+    "t5:%016lx t6:%016lx\n",
+        (unsigned long) uc->uc_mcontext.__gregs[1],
+        (unsigned long) uc->uc_mcontext.__gregs[3],
+        (unsigned long) uc->uc_mcontext.__gregs[4],
+        (unsigned long) uc->uc_mcontext.__gregs[5],
+        (unsigned long) uc->uc_mcontext.__gregs[6],
+        (unsigned long) uc->uc_mcontext.__gregs[7],
+        (unsigned long) uc->uc_mcontext.__gregs[8],
+        (unsigned long) uc->uc_mcontext.__gregs[9],
+        (unsigned long) uc->uc_mcontext.__gregs[10],
+        (unsigned long) uc->uc_mcontext.__gregs[11],
+        (unsigned long) uc->uc_mcontext.__gregs[12],
+        (unsigned long) uc->uc_mcontext.__gregs[13],
+        (unsigned long) uc->uc_mcontext.__gregs[14],
+        (unsigned long) uc->uc_mcontext.__gregs[15],
+        (unsigned long) uc->uc_mcontext.__gregs[16],
+        (unsigned long) uc->uc_mcontext.__gregs[17],
+        (unsigned long) uc->uc_mcontext.__gregs[18],
+        (unsigned long) uc->uc_mcontext.__gregs[19],
+        (unsigned long) uc->uc_mcontext.__gregs[20],
+        (unsigned long) uc->uc_mcontext.__gregs[21],
+        (unsigned long) uc->uc_mcontext.__gregs[22],
+        (unsigned long) uc->uc_mcontext.__gregs[23],
+        (unsigned long) uc->uc_mcontext.__gregs[24],
+        (unsigned long) uc->uc_mcontext.__gregs[25],
+        (unsigned long) uc->uc_mcontext.__gregs[26],
+        (unsigned long) uc->uc_mcontext.__gregs[27],
+        (unsigned long) uc->uc_mcontext.__gregs[28],
+        (unsigned long) uc->uc_mcontext.__gregs[29],
+        (unsigned long) uc->uc_mcontext.__gregs[30],
+        (unsigned long) uc->uc_mcontext.__gregs[31]
+    );
+    logStackContent((void**)uc->uc_mcontext.__gregs[REG_SP]);
     #elif defined(__aarch64__) /* Linux AArch64 */
     serverLog(LL_WARNING,
 	      "\n"