From: Yodel Eldar <yodel.eldar@yodel.dev>
Date: Tue, 3 Feb 2026 11:51:58 +0000 (+0000)
Subject: gdbstub: Export host_to_gdb_errno File-I/O helper function
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3fbf1a5f017bc1f33ebb50988d273e5a1e4f6f5;p=thirdparty%2Fqemu.git

gdbstub: Export host_to_gdb_errno File-I/O helper function

Move host_to_gdb_errno from target/m68k/m68k-semi.c to
gdbstub/syscalls.c. Declare it in include/gdbstub/syscalls.h.

Add both newly added GDB File-I/O supported errno values, EIO and
ENOSYS, to the mapping.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Yodel Eldar <yodel.eldar@yodel.dev>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20260116014612.226183-3-yodel.eldar@yodel.dev>
Message-ID: <20260203115201.2387721-9-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---

diff --git a/gdbstub/syscalls.c b/gdbstub/syscalls.c
index d8bb90cc1c..15050984a0 100644
--- a/gdbstub/syscalls.c
+++ b/gdbstub/syscalls.c
@@ -145,6 +145,42 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
     gdb_syscall_handling(gdbserver_syscall_state.syscall_buf);
 }
 
+/*
+ * Map host error numbers to their GDB protocol counterparts.
+ * For the list of GDB File-I/O supported error numbers, please consult:
+ * https://sourceware.org/gdb/current/onlinedocs/gdb.html/Errno-Values.html
+ */
+int host_to_gdb_errno(int err)
+{
+#define E(X)  case E##X: return GDB_E##X
+    switch (err) {
+    E(PERM);
+    E(NOENT);
+    E(INTR);
+    E(IO);
+    E(BADF);
+    E(ACCES);
+    E(FAULT);
+    E(BUSY);
+    E(EXIST);
+    E(NODEV);
+    E(NOTDIR);
+    E(ISDIR);
+    E(INVAL);
+    E(NFILE);
+    E(MFILE);
+    E(FBIG);
+    E(NOSPC);
+    E(SPIPE);
+    E(ROFS);
+    E(NOSYS);
+    E(NAMETOOLONG);
+    default:
+        return GDB_EUNKNOWN;
+    }
+#undef E
+}
+
 /*
  * GDB Command Handlers
  */
diff --git a/include/gdbstub/syscalls.h b/include/gdbstub/syscalls.h
index 6200416f77..a09559128b 100644
--- a/include/gdbstub/syscalls.h
+++ b/include/gdbstub/syscalls.h
@@ -102,6 +102,15 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
  */
 int use_gdb_syscalls(void);
 
+/**
+ * host_to_gdb_errno: convert host errno to GDB errno value
+ * @err: errno from host
+ *
+ * Given an error number from the host, this helper function returns
+ * its GDB File-I/O specified representation.
+ */
+int host_to_gdb_errno(int err);
+
 /**
  * gdb_exit: exit gdb session, reporting inferior status
  * @code: exit code reported
diff --git a/target/m68k/m68k-semi.c b/target/m68k/m68k-semi.c
index 578a08dfee..bdc798a28c 100644
--- a/target/m68k/m68k-semi.c
+++ b/target/m68k/m68k-semi.c
@@ -46,35 +46,6 @@
 #define HOSTED_ISATTY 12
 #define HOSTED_SYSTEM 13
 
-static int host_to_gdb_errno(int err)
-{
-#define E(X)  case E##X: return GDB_E##X
-    switch (err) {
-    E(PERM);
-    E(NOENT);
-    E(INTR);
-    E(BADF);
-    E(ACCES);
-    E(FAULT);
-    E(BUSY);
-    E(EXIST);
-    E(NODEV);
-    E(NOTDIR);
-    E(ISDIR);
-    E(INVAL);
-    E(NFILE);
-    E(MFILE);
-    E(FBIG);
-    E(NOSPC);
-    E(SPIPE);
-    E(ROFS);
-    E(NAMETOOLONG);
-    default:
-        return GDB_EUNKNOWN;
-    }
-#undef E
-}
-
 static void m68k_semi_u32_cb(CPUState *cs, uint64_t ret, int err)
 {
     CPUM68KState *env = cpu_env(cs);