* mipsread.c: Clean up some white space.

[deliverable/binutils-gdb.git] / gdb / tm-sysv4.h

diff --git a/gdb/tm-sysv4.h b/gdb/tm-sysv4.h
index 4d95ea0502e78446847446b7ebcf520ba0ba99fa..9348ec8edcbd36433eca8838253d17a7455e191c 100644 (file)
--- a/gdb/tm-sysv4.h
+++ b/gdb/tm-sysv4.h
@@ -19,3 +19,23 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 #include "solib.h"     /* Support for shared libraries. */
+
+/* For SVR4 shared libraries, each call to a library routine goes through
+   a small piece of trampoline code in the ".init" section.  Although each
+   of these fragments is labeled with the name of the routine being called,
+   the gdb symbol reading code deliberately ignores them so it won't confuse
+   them with the real functions.  It does however know about the label that
+   precedes all of the fragments, which is "_init".  Thus when we lookup a
+   function that corresponds to a PC value which is in one of the trampoline
+   fragments, we'll appear to be in the function "_init".  The following
+   macro will evaluate to nonzero when NAME is valid and matches "_init".
+   The horribly ugly wait_for_inferior() routine uses this macro to detect
+   when we have stepped into one of these fragments. */
+
+#define IN_SOLIB_TRAMPOLINE(pc,name) ((name) && (strcmp ("_init", name) == 0))
+
+/* In SVR4 ELF files, the ABI defines (pg. 4-25) that "External C symbols
+   have the same names in C, assembly code, and object files' symbol
+   tables."  So... */
+
+#undef NAMES_HAVE_UNDERSCORE