gdb/

	* breakpoint.c (deprecated_read_memory_nobpt): Update to use
	shadow_len.
	(insert_bp_location, reattach_breakpoints, remove_breakpoint)
	(delete_breakpoint): Update calls to changed methods.
	(deprecated_insert_raw_breakpoint, deprecated_remove_raw_breakpoint)
	(single_step_breakpoints, insert_single_step_breakpoint)
	(remove_single_step_breakpoints): New.
	* breakpoint.h (struct bp_target_info): New.
	(struct bp_location): Replace shadow_contents with
	target_info and overlay_target_info.
	(deprecated_insert_raw_breakpoint, deprecated_remove_raw_breakpoint)
	(insert_single_step_breakpoint, remove_single_step_breakpoints): New
	prototypes.
	* gdbarch.sh: Forward declare struct bp_target_info in gdbarch.h.
	(memory_insert_breakpoint, memory_remove_breakpoint): Update second
	argument.
	* mem-break.c (default_memory_insert_breakpoint): Update.  Set
	placed_address, placed_size, and shadow_len.
	(default_memory_remove_breakpoint): Update.  Don't use
	BREAKPOINT_FROM_PC.
	(memory_insert_breakpoint, memory_remove_breakpoint): Update.
	* target.c (update_current_target): Update prototypes for changed
	functions.
	(debug_to_insert_breakpoint, debug_to_remove_breakpoint)
	(debug_to_insert_hw_breakpoint, debug_to_remove_hw_breakpoint):
	Update.
	* target.h: Forward declare struct bp_target_info.
	(struct target_ops): Use a bp_target_info argument for
	to_insert_breakpoint, to_remove_breakpoint,
	to_insert_hw_breakpoint, and to_remove_hw_breakpoint.
	(target_insert_breakpoint, target_remove_breakpoint)
	(target_insert_hw_breakpoint, target_remove_hw_breakpoint)
	(memory_insert_breakpoint, memory_remove_breakpoint)
	(default_memory_insert_breakpoint, default_memory_remove_breakpoint):
	Update.
	* config/i386/nm-i386.h: Forward declare struct bp_target_info.
	(i386_insert_hw_breakpoint, i386_remove_hw_breakpoint): Update.
	(target_insert_hw_breakpoint, target_remove_hw_breakpoint): Likewise.

	* gdbarch.c, gdbarch.h: Regenerated.

	* alpha-tdep.c (alpha_software_single_step): Use
	insert_single_step_breakpoint and remove_single_step_breakpoints.
	Remove unused statics.
	* arm-tdep.c (arm_software_single_step): Likewise.  Add a note.
	* cris-tdep.c (cris_software_single_step): Likewise.
	* mips-tdep.c (mips_software_single_step): Likewise.
	* rs6000-tdep.c (rs6000_software_single_step): Likewise.
	* sparc-tdep.c (sparc_software_single_step): Likewise.
	* wince.c (struct thread_info_struct): Remove step_prev.
	(undoSStep): Use remove_single_step_breakpoints.
	(wince_software_single_step): Use insert_single_step_breakpoint.

	* corelow.c (ignore): Remove unneeded prototype.  Update arguments.
	* exec.c (ignore): Likewise.
	* sol-thread.c (ignore): Likewise.

	* procfs.c (dbx_link_shadow_contents): Delete.
	(dbx_link_bpt): New.
	(procfs_mourn_inferior): Remove it if necessary.
	(remove_dbx_link_breakpoint): Use it.
	(insert_dbx_link_bpt_in_file): Set it.
	(procfs_init_inferior): Don't update dbx_link_bpt_addr.
	* rs6000-nat.c (exec_one_dummy_insn): Use
	deprecated_insert_raw_breakpoint and
	deprecated_remove_raw_breakpoint.
	* solib-irix.c (shadow_contents, breakpoint_addr): Delete.
	(base_breakpoint): New.
	(disable_break): Use it.
	(enable_break): Set it.

	* i386-nat.c (i386_insert_hw_breakpoint, i386_remove_hw_breakpoint):
	Update.
	* ia64-tdep.c (ia64_memory_insert_breakpoint)
	(ia64_memory_remove_breakpoint): Likewise.
	* m32r-tdep.c (m32r_memory_insert_breakpoint)
	(m32r_memory_remove_breakpoint): Likewise.
	* monitor.c (monitor_insert_breakpoint, monitor_remove_breakpoint):
	Likewise.  Remove unnecessary prototypes.  Use placed_address
	and placed_size.  Removed useless read from memory.
	* nto-procfs.c (procfs_insert_breakpoint)
	(procfs_remove_breakpoint, procfs_insert_hw_breakpoint)
	(procfs_remove_hw_breakpoint): Update.
	* ocd.c (ocd_insert_breakpoint, ocd_remove_breakpoint): Likewise.
	* ocd.h (ocd_insert_breakpoint, ocd_remove_breakpoint): Likewise.
	* ppc-linux-tdep.c (ppc_linux_memory_remove_breakpoint): Likewise.
	* ppc-tdep.h (ppc_linux_memory_remove_breakpoint): Likewise.
	* remote-e7000.c (e7000_insert_breakpoint)
	(e7000_remove_breakpoint): Likewise.
	* remote-m32r-sdi.c (m32r_insert_breakpoint)
	(m32r_remove_breakpoint): Likewise.
	* remote-mips.c (mips_insert_breakpoint)
	(mips_remove_breakpoint): Likewise.
	* remote-rdp.c (remote_rdp_insert_breakpoint)
	(remote_rdp_remove_breakpoint): Likewise.
	(rdp_step): Use deprecated_insert_raw_breakpoint and
	deprecated_remove_raw_breakpoint.
	* remote-sds.c (sds_insert_breakpoint, sds_remove_breakpoint):
	Update.
	* remote-sim.c (gdbsim_insert_breakpoint, gdbsim_remove_breakpoint):
	Delete.
	(init_gdbsim_ops): Use memory_insert_breakpoint and
	memory_remove_breakpoint.
	* remote-st.c (st2000_insert_breakpoint)
	(st2000_remove_breakpoint): Update.  Remove unused
	BREAKPOINT_FROM_PC.
	* remote.c (remote_insert_breakpoint, remote_remove_breakpoint):
	Update.  Use placed_address and placed_size.
	(remote_insert_hw_breakpoint, remote_remove_hw_breakpoint): Likewise.
gdb/doc/
	* gdbint.texinfo (x86 Watchpoints, Target Conditionals): Update insert
	and remove breakpoint prototypes.
	(Watchpoints): Move description of target_insert_hw_breakpoint and
	target_remove_hw_breakpoint ...
	(Breakpoints): ... to here.  Document target_insert_breakpoint and
	target_remove_breakpoint.

1 files changed, 46 insertions, 7 deletions

diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index d1e2fd8..607fd77 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -185,6 +185,36 @@ enum target_hw_bp_type
     hw_execute = 3		/* Execute HW breakpoint */
   };
 
+
+/* Information used by targets to insert and remove breakpoints.  */
+
+struct bp_target_info
+{
+  /* Address at which the breakpoint was placed.  This is normally the
+     same as ADDRESS from the bp_location, except when adjustment
+     happens in BREAKPOINT_FROM_PC.  The most common form of
+     adjustment is stripping an alternate ISA marker from the PC which
+     is used to determine the type of breakpoint to insert.  */
+  CORE_ADDR placed_address;
+
+  /* If the breakpoint lives in memory and reading that memory would
+     give back the breakpoint, instead of the original contents, then
+     the original contents are cached here.  Only SHADOW_LEN bytes of
+     this buffer are valid, and only when the breakpoint is inserted.  */
+  gdb_byte shadow_contents[BREAKPOINT_MAX];
+
+  /* The length of the data cached in SHADOW_CONTENTS.  */
+  int shadow_len;
+
+  /* The size of the placed breakpoint, according to
+     BREAKPOINT_FROM_PC, when the breakpoint was inserted.  This is
+     generally the same as SHADOW_LEN, unless we did not need
+     to read from the target to implement the memory breakpoint
+     (e.g. if a remote stub handled the details).  We may still
+     need the size to remove the breakpoint safely.  */
+  int placed_size;
+};
+
 /* GDB maintains two types of information about each breakpoint (or
    watchpoint, or other related event).  The first type corresponds
    to struct breakpoint; this is a relatively high-level structure
@@ -242,13 +272,6 @@ struct bp_location
      associated with the address.  Used primarily for overlay debugging.  */
   asection *section;
 
-  /* "Real" contents of byte where breakpoint has been inserted.
-     Valid only when breakpoints are in the program.  Under the complete
-     control of the target insert_breakpoint and remove_breakpoint routines.
-     No other code should assume anything about the value(s) here.
-     Valid only for bp_loc_software_breakpoint.  */
-  gdb_byte shadow_contents[BREAKPOINT_MAX];
-
   /* Address at which breakpoint was requested, either by the user or
      by GDB for internal breakpoints.  This will usually be the same
      as ``address'' (above) except for cases in which
@@ -256,6 +279,12 @@ struct bp_location
      which to place the breakpoint in order to comply with a
      processor's architectual constraints.  */
   CORE_ADDR requested_address;
+
+  /* Details of the placed breakpoint, when inserted.  */
+  struct bp_target_info target_info;
+
+  /* Similarly, for the breakpoint at an overlay's LMA, if necessary.  */
+  struct bp_target_info overlay_target_info;
 };
 
 /* This structure is a collection of function pointers that, if available,
@@ -796,6 +825,16 @@ extern void delete_command (char *arg, int from_tty);
    remove fails. */
 extern int remove_hw_watchpoints (void);
 
+/* Manage a software single step breakpoint (or two).  Insert may be called
+   twice before remove is called.  */
+extern void insert_single_step_breakpoint (CORE_ADDR);
+extern void remove_single_step_breakpoints (void);
+
+/* Manage manual breakpoints, separate from the normal chain of
+   breakpoints.  These functions are used in murky target-specific
+   ways.  Please do not add more uses!  */
+extern void *deprecated_insert_raw_breakpoint (CORE_ADDR);
+extern int deprecated_remove_raw_breakpoint (void *);
 
 /* Indicator of whether exception catchpoints should be nuked between
    runs of a program.  */