MIPS: Keep the ISA bit in compressed code addresses

[external/binutils.git] / gdb / gdbarch.h

diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 0bd1d56..ba4fe62 100644 (file)
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -51,6 +51,8 @@ struct target_ops;
 struct obstack;
 struct bp_target_info;
 struct target_desc;
+struct objfile;
+struct symbol;
 struct displaced_step_closure;
 struct core_regset_section;
 struct syscall;
@@ -688,6 +690,16 @@ typedef int (gdbarch_in_function_epilogue_p_ftype) (struct gdbarch *gdbarch, COR
 extern int gdbarch_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR addr);
 extern void set_gdbarch_in_function_epilogue_p (struct gdbarch *gdbarch, gdbarch_in_function_epilogue_p_ftype *in_function_epilogue_p);
 
+/* Process an ELF symbol in the minimal symbol table in a backend-specific
+   way.  Normally this hook is supposed to do nothing, however if required,
+   then this hook can be used to apply tranformations to symbols that are
+   considered special in some way.  For example the MIPS backend uses it
+   to interpret `st_other' information to mark compressed code symbols so
+   that they can be treated in the appropriate manner in the processing of
+   the main symbol table and DWARF-2 records. */
+
+extern int gdbarch_elf_make_msymbol_special_p (struct gdbarch *gdbarch);
+
 typedef void (gdbarch_elf_make_msymbol_special_ftype) (asymbol *sym, struct minimal_symbol *msym);
 extern void gdbarch_elf_make_msymbol_special (struct gdbarch *gdbarch, asymbol *sym, struct minimal_symbol *msym);
 extern void set_gdbarch_elf_make_msymbol_special (struct gdbarch *gdbarch, gdbarch_elf_make_msymbol_special_ftype *elf_make_msymbol_special);
@@ -696,6 +708,45 @@ typedef void (gdbarch_coff_make_msymbol_special_ftype) (int val, struct minimal_
 extern void gdbarch_coff_make_msymbol_special (struct gdbarch *gdbarch, int val, struct minimal_symbol *msym);
 extern void set_gdbarch_coff_make_msymbol_special (struct gdbarch *gdbarch, gdbarch_coff_make_msymbol_special_ftype *coff_make_msymbol_special);
 
+/* Process a symbol in the main symbol table in a backend-specific way.
+   Normally this hook is supposed to do nothing, however if required,
+   then this hook can be used to apply tranformations to symbols that
+   are considered special in some way.  This is currently used by the
+   MIPS backend to make sure compressed code symbols have the ISA bit
+   set.  This in turn is needed for symbol values seen in GDB to match
+   the values used at the runtime by the program itself, for function
+   and label references. */
+
+typedef void (gdbarch_make_symbol_special_ftype) (struct symbol *sym, struct objfile *objfile);
+extern void gdbarch_make_symbol_special (struct gdbarch *gdbarch, struct symbol *sym, struct objfile *objfile);
+extern void set_gdbarch_make_symbol_special (struct gdbarch *gdbarch, gdbarch_make_symbol_special_ftype *make_symbol_special);
+
+/* Adjust the address retrieved from a DWARF-2 record other than a line
+   entry in a backend-specific way.  Normally this hook is supposed to
+   return the address passed unchanged, however if that is incorrect for
+   any reason, then this hook can be used to fix the address up in the
+   required manner.  This is currently used by the MIPS backend to make
+   sure addresses in FDE, range records, etc. referring to compressed
+   code have the ISA bit set, matching line information and the symbol
+   table. */
+
+typedef CORE_ADDR (gdbarch_adjust_dwarf2_addr_ftype) (CORE_ADDR pc);
+extern CORE_ADDR gdbarch_adjust_dwarf2_addr (struct gdbarch *gdbarch, CORE_ADDR pc);
+extern void set_gdbarch_adjust_dwarf2_addr (struct gdbarch *gdbarch, gdbarch_adjust_dwarf2_addr_ftype *adjust_dwarf2_addr);
+
+/* Adjust the address updated by a line entry in a backend-specific way.
+   Normally this hook is supposed to return the address passed unchanged,
+   however in the case of inconsistencies in these records, this hook can
+   be used to fix them up in the required manner.  This is currently used
+   by the MIPS backend to make sure all line addresses in compressed code
+   are presented with the ISA bit set, which is not always the case.  This
+   in turn ensures breakpoint addresses are correctly matched against the
+   stop PC. */
+
+typedef CORE_ADDR (gdbarch_adjust_dwarf2_line_ftype) (CORE_ADDR addr, int rel);
+extern CORE_ADDR gdbarch_adjust_dwarf2_line (struct gdbarch *gdbarch, CORE_ADDR addr, int rel);
+extern void set_gdbarch_adjust_dwarf2_line (struct gdbarch *gdbarch, gdbarch_adjust_dwarf2_line_ftype *adjust_dwarf2_line);
+
 extern int gdbarch_cannot_step_breakpoint (struct gdbarch *gdbarch);
 extern void set_gdbarch_cannot_step_breakpoint (struct gdbarch *gdbarch, int cannot_step_breakpoint);