From a74d8d8d9f7f05666ff34d27ac22cecb61c88a4b Mon Sep 17 00:00:00 2001
From: Xing Li <[email protected]>
Date: Thu, 5 Jan 2023 15:49:52 +0800
Subject: [PATCH]  Fix gas bug:     Segment error in compilation due to too 
 long symbol name.

    change "char buffer[8192];" into "char *buffer =
    (char *) malloc(1000 +  6 * len_str);"in function
    loongarch_expand_macro_with_format_map.

    gas/config/tc-loongarch.c
    include/opcode/loongarch.h
    opcodes/loongarch-coder.c

Signed-off-by: Xing Li <[email protected]>
---
 gas/config/tc-loongarch.c  |  7 +++++--
 include/opcode/loongarch.h |  4 ++--
 opcodes/loongarch-coder.c  | 15 ++++++++++-----
 3 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/gas/config/tc-loongarch.c b/gas/config/tc-loongarch.c
index 26ee3f1a..9ab015a3 100644
--- a/gas/config/tc-loongarch.c
+++ b/gas/config/tc-loongarch.c
@@ -921,7 +921,8 @@ assember_macro_helper (const char * const args[], void *context_ptr)
 	}
       while (0);
 
-      ret = loongarch_expand_macro (insns_buf, arg_strs, NULL, NULL);
+      ret = loongarch_expand_macro (insns_buf, arg_strs, NULL, NULL,
+                                    sizeof (args_buf));
     }
   return ret;
 }
@@ -932,6 +933,7 @@ static void
 loongarch_assemble_INSNs (char *str)
 {
   char *rest;
+  size_t len_str = strlen(str);
 
   for (rest = str; *rest != ';' && *rest != '\0'; rest++);
   if (*rest == ';')
@@ -971,7 +973,8 @@ loongarch_assemble_INSNs (char *str)
 	{
 	  char *c_str =
 	    loongarch_expand_macro (the_one.insn->macro,
-	      the_one.arg_strs, assember_macro_helper, &the_one);
+	      the_one.arg_strs, assember_macro_helper,
+              &the_one, len_str);
 	  loongarch_assemble_INSNs (c_str);
 	  free (c_str);
 	}
diff --git a/include/opcode/loongarch.h b/include/opcode/loongarch.h
index 47a9d94b..fc0be236 100644
--- a/include/opcode/loongarch.h
+++ b/include/opcode/loongarch.h
@@ -151,12 +151,12 @@ loongarch_expand_macro_with_format_map (const char *format, const char *macro,
 					char * (*helper) (
 					  const char * const arg_strs[],
 					  void *context),
-					void *context);
+					void *context, size_t len_str);
 extern char *
 loongarch_expand_macro (const char *macro, const char * const arg_strs[],
 			char * (*helper) (const char * const arg_strs[],
 					  void *context),
-			void *context);
+			void *context, size_t len_str);
 extern size_t
 loongarch_bits_imm_needed (int64_t imm, int si);
 
diff --git a/opcodes/loongarch-coder.c b/opcodes/loongarch-coder.c
index 399af4f0..aa6a2388 100644
--- a/opcodes/loongarch-coder.c
+++ b/opcodes/loongarch-coder.c
@@ -352,13 +352,18 @@ loongarch_expand_macro_with_format_map (const char *format, const char *macro,
 					char * (*helper) (
 					  const char * const arg_strs[],
 					  void *context),
-					void *context)
+					void *context, size_t len_str)
 {
   char esc1s[MAX_ARG_NUM_PLUS_2 - 1], esc2s[MAX_ARG_NUM_PLUS_2 - 1];
   const char *bit_fields[MAX_ARG_NUM_PLUS_2 - 1];
   const char *src;
   char *dest;
-  char buffer[8192];
+
+  /*The expanded macro character length does not exceed 1000, and number of
+   * label is 6 at most in the expanded macro. The len_str is the length of
+   * str.
+   */
+  char *buffer = (char *) malloc(1000 + 6 * len_str);
 
   if (format)
     loongarch_parse_format (format, esc1s, esc2s, bit_fields);
@@ -396,17 +401,17 @@ loongarch_expand_macro_with_format_map (const char *format, const char *macro,
       *dest++ = *src++;
 
   *dest = '\0';
-  return strdup (buffer);
+  return buffer;
 }
 
 char *
 loongarch_expand_macro (const char *macro, const char * const arg_strs[],
 			char * (*helper) (const char * const arg_strs[],
 					  void *context),
-			void *context)
+			void *context, size_t len_str)
 {
   return loongarch_expand_macro_with_format_map
-	   (NULL, macro, arg_strs, I, helper, context);
+	   (NULL, macro, arg_strs, I, helper, context, len_str);
 }
 
 size_t
-- 
2.27.0