* config/mips/tm-irix5.h (IN_SIGTRAMP): Redefine for Irix 5,

	Irix 5 has a standard _sigtramp signal handler.
	* irix5-nat.c (solib_add):  Get rid of sigtramp_address handling,
	it is not needed for a standard _sigtramp signal handler.
	Add shared library sections to the section table of the target
	before adding the symbols.
	* mips-tdep.c (mips_skip_prologue):  Do not skip load immediate
	instructions that do not prepare a stack adjustment.
	* regex.c (SIGN_EXTEND_CHAR):  Update to emacs-19.25 definition,
	which does the right thing on machines where `char' is unsigned.

1 files changed, 10 insertions, 2 deletions

diff --git a/gdb/regex.c b/gdb/regex.c
index 9b6dc5b..3f30284 100644
--- a/gdb/regex.c
+++ b/gdb/regex.c
@@ -93,8 +93,16 @@ init_syntax_once ()
 
 #define BYTEWIDTH 8
 
-#ifndef SIGN_EXTEND_CHAR
-#define SIGN_EXTEND_CHAR(x) (x)
+/* We remove any previous definition of `SIGN_EXTEND_CHAR',
+   since ours (we hope) works properly with all combinations of
+   machines, compilers, `char' and `unsigned char' argument types.
+   (Per Bothner suggested the basic approach.)  */
+#undef SIGN_EXTEND_CHAR
+#if __STDC__
+#define SIGN_EXTEND_CHAR(c) ((signed char) (c))
+#else  /* not __STDC__ */
+/* As in Harbison and Steele.  */
+#define SIGN_EXTEND_CHAR(c) ((((unsigned char) (c)) ^ 128) - 128)
 #endif
 
 static int obscure_syntax = 0;