* infrun.c (IN_SOLIB_TRAMPOLINE): Correct comment, trampolines

are in the .plt section.
	* minsyms.c (lookup_solib_trampoline_symbol_by_pc,
	find_solib_trampoline_target):  New functions for handling
	stepping into -g compiled shared libraries.
	* symtab.h (lookup_solib_trampoline_symbol_by_pc,
	find_solib_trampoline_target):  Add prototypes.
	* config/tm-sunos.h (IN_SOLIB_TRAMPOLINE, SKIP_TRAMPOLINE_CODE):
	Define to handle stepping into  -g compiled shared libraries.
	* config/tm-sysv4.h (SKIP_TRAMPOLINE_CODE):  Define to handle
	stepping into  -g compiled shared libraries.
	* configure.in:  Add mips-*-sysv4* support.
	* config/mips/mipsv4.mh, config/mips/mipsv4.mt,
	config/mips/tm-mipsv4.h, config/mips/xm-mipsv4.h, mipsv4-nat.c:
	New files for MIPS SVR4 support.
	* Makefile.in:  Update for new mipsv4 files.
	* alpha-tdep.c (heuristic_proc_desc, find_proc_desc):  Use
	read_next_frame_reg to obtain the frame relative stack pointer.
	* mips-tdep.c (heuristic_proc_desc):  Use read_next_frame_reg to
	obtain the frame relative stack pointer.
	* mdebugread.c (parse_partial_symbols, psymtab_to_symtab1):
	Handle stStatic and stStaticProc symbols in stabs-in-ecoff output
	by entering them into the minimal symbol table.
	* printcmd.c (print_scalar_formatted):  Do not try to unpack to
	a long for float formats.
	* solib.c:  Include "elf/mips.h" only if DT_MIPS_RLD_MAP does not
	get defined in <link.h>.
	* solib.c (solib_add):  Add shared library sections to the section
	table of the target before adding the symbols.
	* partial-stab.h:  Relocate static and global functions.
	* dbxread.c (read_dbx_symtab):  Remove unused variable
	end_of_text_address.  Relocate text_addr when passing it
	to end_psymtab.

	For Alpha OSF/1 targets, enable gdb to set breakpoints in shared
	library functions before the executable is run. Retrieve dynamic
	symbols from stripped executables.
	* mipsread.c (read_alphacoff_dynamic_symtab):  New function.
	* mipsread.c (mipscoff_symfile_read):  Use it. Issue warning message
	if no debugging symbols were found.
	* alpha-tdep.c (alpha_skip_prologue):  Silently return the unaltered
	pc if memory at the pc is not accessible and GDB_TARGET_HAS_SHARED_LIBS
	is defined.
	* config/alpha/nm-alpha.h (GDB_TARGET_HAS_SHARED_LIBS):  Define,
	OSF/1 has shared libraries.

gdb/alpha-tdep.c

@@ -329,7 +329,7 @@ heuristic_proc_desc(start_pc, limit_pc, next_frame)
     CORE_ADDR start_pc, limit_pc;
     FRAME next_frame;
 {
-    CORE_ADDR sp = next_frame ? next_frame->frame : read_register (SP_REGNUM);
+    CORE_ADDR sp = read_next_frame_reg (next_frame, SP_REGNUM);
     CORE_ADDR cur_pc;
     int frame_size;
     int has_frame_reg = 0;
@@ -456,7 +456,7 @@ find_proc_desc(pc, next_frame)
   if (PC_IN_CALL_DUMMY (pc, 0, 0))
     {
       struct linked_proc_info *link;
-      CORE_ADDR sp = next_frame ? next_frame->frame : read_register (SP_REGNUM);
+      CORE_ADDR sp = read_next_frame_reg (next_frame, SP_REGNUM);
       alpha_extra_func_info_t found_proc_desc = NULL;
       long min_distance = LONG_MAX;
 
@@ -913,6 +913,18 @@ alpha_skip_prologue (pc, lenient)
     unsigned long inst;
     int offset;
     CORE_ADDR post_prologue_pc;
+    char buf[4];
+
+#ifdef GDB_TARGET_HAS_SHARED_LIBS
+    /* Silently return the unaltered pc upon memory errors.
+       This could happen on OSF/1 if decode_line_1 tries to skip the
+       prologue for quickstarted shared library functions when the
+       shared library is not yet mapped in.
+       Reading target memory is slow over serial lines, so we perform
+       this check only if the target has shared libraries.  */
+    if (target_read_memory (pc, buf, 4))
+      return pc;
+#endif
 
     /* See if we can determine the end of the prologue via the symbol table.
        If so, then return either PC, or the PC after the prologue, whichever
@@ -931,7 +943,6 @@ alpha_skip_prologue (pc, lenient)
        or in the gcc frame.  */
     for (offset = 0; offset < 100; offset += 4)
       {
-	char buf[4];
 	int status;
 
 	status = read_memory_nobpt (pc + offset, buf, 4);