http://sourceware.org/gdb/wiki/ProjectArcher
http://sourceware.org/gdb/wiki/ArcherBranchManagement
GIT snapshot:
commit 791165df07fd22d381def1318954c389a606f81a
archer-jankratochvil-ifunc
Index: gdb-7.0.1/gdb/alpha-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/alpha-linux-tdep.c 2009-07-02 19:25:52.000000000 +0200
+++ gdb-7.0.1/gdb/alpha-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -25,6 +25,7 @@
#include "symtab.h"
#include "regset.h"
#include "regcache.h"
+#include "linux-tdep.h"
#include "alpha-tdep.h"
@@ -235,6 +236,9 @@ alpha_linux_init_abi (struct gdbarch_inf
set_gdbarch_regset_from_core_section
(gdbarch, alpha_linux_regset_from_core_section);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/amd64-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/amd64-linux-tdep.c 2010-01-21 20:45:22.000000000 +0100
+++ gdb-7.0.1/gdb/amd64-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -1557,6 +1557,9 @@ amd64_linux_init_abi (struct gdbarch_inf
amd64_linux_record_tdep.arg6 = AMD64_R9_REGNUM;
tdep->i386_syscall_record = amd64_linux_syscall_record;
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
Index: gdb-7.0.1/gdb/arm-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/arm-linux-tdep.c 2009-07-31 01:05:03.000000000 +0200
+++ gdb-7.0.1/gdb/arm-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -873,6 +873,9 @@ arm_linux_init_abi (struct gdbarch_info
set_gdbarch_displaced_step_free_closure (gdbarch,
simple_displaced_step_free_closure);
set_gdbarch_displaced_step_location (gdbarch, displaced_step_at_entry_point);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/elfread.c
===================================================================
--- gdb-7.0.1.orig/gdb/elfread.c 2010-01-21 20:45:21.000000000 +0100
+++ gdb-7.0.1/gdb/elfread.c 2010-01-21 20:46:30.000000000 +0100
@@ -168,7 +168,8 @@ record_minimal_symbol (char *name, CORE_
{
struct gdbarch *gdbarch = get_objfile_arch (objfile);
- if (ms_type == mst_text || ms_type == mst_file_text)
+ if (ms_type == mst_text || ms_type == mst_file_text
+ || ms_type == mst_text_gnu_ifunc)
address = gdbarch_smash_text_address (gdbarch, address);
return prim_record_minimal_symbol_and_info
@@ -373,7 +374,10 @@ elf_symtab_read (struct objfile *objfile
{
if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
{
- ms_type = mst_text;
+ if (sym->flags & BSF_GNU_INDIRECT_FUNCTION)
+ ms_type = mst_text_gnu_ifunc;
+ else
+ ms_type = mst_text;
}
else if ((sym->name[0] == '.' && sym->name[1] == 'L')
|| ((sym->flags & BSF_LOCAL)
Index: gdb-7.0.1/gdb/frv-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/frv-linux-tdep.c 2009-07-02 19:25:53.000000000 +0200
+++ gdb-7.0.1/gdb/frv-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -31,6 +31,7 @@
#include "frame-unwind.h"
#include "regset.h"
#include "gdb_string.h"
+#include "linux-tdep.h"
/* Define the size (in bytes) of an FR-V instruction. */
static const int frv_instr_size = 4;
@@ -485,7 +486,21 @@ frv_linux_regset_from_core_section (stru
return NULL;
}
-
+static CORE_ADDR
+frv_linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
+ CORE_ADDR addr,
+ struct target_ops *targ)
+{
+ CORE_ADDR pc = frv_convert_from_func_ptr_addr (gdbarch, addr, targ);
+ CORE_ADDR resolved;
+
+ resolved = linux_convert_from_func_and_ptr (gdbarch, addr, pc);
+ if (resolved != pc)
+ pc = frv_convert_from_func_ptr_addr (gdbarch, resolved, targ);
+
+ return pc;
+}
+
static void
frv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
@@ -493,6 +508,10 @@ frv_linux_init_abi (struct gdbarch_info
frame_unwind_append_unwinder (gdbarch, &frv_linux_sigtramp_frame_unwind);
set_gdbarch_regset_from_core_section (gdbarch,
frv_linux_regset_from_core_section);
+
+ if (frv_abi (gdbarch) == FRV_ABI_FDPIC)
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ frv_linux_convert_from_func_ptr_addr);
}
static enum gdb_osabi
Index: gdb-7.0.1/gdb/frv-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/frv-tdep.c 2009-07-02 19:25:53.000000000 +0200
+++ gdb-7.0.1/gdb/frv-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -1169,7 +1169,7 @@ find_func_descr (struct gdbarch *gdbarch
return descr;
}
-static CORE_ADDR
+CORE_ADDR
frv_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
struct target_ops *targ)
{
Index: gdb-7.0.1/gdb/frv-tdep.h
===================================================================
--- gdb-7.0.1.orig/gdb/frv-tdep.h 2009-01-03 06:57:51.000000000 +0100
+++ gdb-7.0.1/gdb/frv-tdep.h 2010-01-21 20:45:32.000000000 +0100
@@ -118,3 +118,6 @@ CORE_ADDR frv_fetch_objfile_link_map (st
struct target_so_ops;
extern struct target_so_ops frv_so_ops;
+CORE_ADDR frv_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
+ CORE_ADDR addr,
+ struct target_ops *targ);
Index: gdb-7.0.1/gdb/gdbtypes.c
===================================================================
--- gdb-7.0.1.orig/gdb/gdbtypes.c 2010-01-21 20:45:22.000000000 +0100
+++ gdb-7.0.1/gdb/gdbtypes.c 2010-01-21 20:45:32.000000000 +0100
@@ -1904,6 +1904,8 @@ init_type (enum type_code code, int leng
TYPE_NOTTEXT (type) = 1;
if (flags & TYPE_FLAG_FIXED_INSTANCE)
TYPE_FIXED_INSTANCE (type) = 1;
+ if (flags & TYPE_FLAG_GNU_IFUNC)
+ TYPE_GNU_IFUNC (type) = 1;
if (name)
TYPE_NAME (type) = obsavestring (name, strlen (name),
@@ -3762,6 +3764,8 @@ gdbtypes_post_init (struct gdbarch *gdba
= lookup_pointer_type (builtin_type->builtin_void);
builtin_type->builtin_func_ptr
= lookup_pointer_type (lookup_function_type (builtin_type->builtin_void));
+ builtin_type->builtin_func_func
+ = lookup_function_type (builtin_type->builtin_func_ptr);
/* This type represents a GDB internal function. */
builtin_type->internal_fn
@@ -3878,6 +3882,11 @@ objfile_type (struct objfile *objfile)
"<text variable, no debug info>", objfile);
TYPE_TARGET_TYPE (objfile_type->nodebug_text_symbol)
= objfile_type->builtin_int;
+ objfile_type->nodebug_text_gnu_ifunc_symbol
+ = init_type (TYPE_CODE_FUNC, 1, TYPE_FLAG_GNU_IFUNC,
+ "<text gnu-ifunc variable, no debug info>", objfile);
+ TYPE_TARGET_TYPE (objfile_type->nodebug_text_gnu_ifunc_symbol)
+ = objfile_type->nodebug_text_symbol;
objfile_type->nodebug_data_symbol
= init_type (TYPE_CODE_INT,
gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT, 0,
Index: gdb-7.0.1/gdb/gdbtypes.h
===================================================================
--- gdb-7.0.1.orig/gdb/gdbtypes.h 2010-01-21 20:45:23.000000000 +0100
+++ gdb-7.0.1/gdb/gdbtypes.h 2010-01-21 20:45:32.000000000 +0100
@@ -187,6 +187,7 @@ enum type_flag_value
TYPE_FLAG_FIXED_INSTANCE = (1 << 15),
TYPE_FLAG_STUB_SUPPORTED = (1 << 16),
TYPE_FLAG_NOTTEXT = (1 << 17),
+ TYPE_FLAG_GNU_IFUNC = (1 << 18),
/* Used for error-checking. */
TYPE_FLAG_MIN = TYPE_FLAG_UNSIGNED
@@ -292,6 +293,12 @@ enum type_instance_flag_value
#define TYPE_NOTTEXT(t) (TYPE_MAIN_TYPE (t)->flag_nottext)
+/* Currently used only for TYPE_CODE_FUNC where specifies the real function
+ address is returned by this function call. TYPE_TARGET_TYPE determines the
+ final returned function type to be presented to user. */
+
+#define TYPE_GNU_IFUNC(t) (TYPE_MAIN_TYPE (t)->flag_gnu_ifunc)
+
/* Type owner. If TYPE_OBJFILE_OWNED is true, the type is owned by
the objfile retrieved as TYPE_OBJFILE. Otherweise, the type is
owned by an architecture; TYPE_OBJFILE is NULL in this case. */
@@ -427,6 +434,7 @@ struct main_type
unsigned int flag_vector : 1;
unsigned int flag_stub_supported : 1;
unsigned int flag_nottext : 1;
+ unsigned int flag_gnu_ifunc : 1;
unsigned int flag_fixed_instance : 1;
unsigned int flag_objfile_owned : 1;
unsigned int flag_discardable : 1;
@@ -1144,6 +1152,10 @@ struct builtin_type
(*) () can server as a generic function pointer. */
struct type *builtin_func_ptr;
+ /* `function returning pointer to function (returning void)' type.
+ The final void return type is not significant for it. */
+ struct type *builtin_func_func;
+
/* Special-purpose types. */
@@ -1186,6 +1198,7 @@ struct objfile_type
/* Types used for symbols with no debug information. */
struct type *nodebug_text_symbol;
+ struct type *nodebug_text_gnu_ifunc_symbol;
struct type *nodebug_data_symbol;
struct type *nodebug_unknown_symbol;
struct type *nodebug_tls_symbol;
Index: gdb-7.0.1/gdb/hppa-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/hppa-linux-tdep.c 2009-07-02 19:25:54.000000000 +0200
+++ gdb-7.0.1/gdb/hppa-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -31,6 +31,7 @@
#include "regset.h"
#include "regcache.h"
#include "hppa-tdep.h"
+#include "linux-tdep.h"
#include "elf/common.h"
@@ -512,7 +513,21 @@ hppa_linux_regset_from_core_section (str
return NULL;
}
-
+
+static CORE_ADDR
+hppa32_linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
+ CORE_ADDR addr,
+ struct target_ops *targ)
+{
+ CORE_ADDR pc = hppa32_convert_from_func_ptr_addr (gdbarch, addr, targ);
+ CORE_ADDR resolved;
+
+ resolved = linux_convert_from_func_and_ptr (gdbarch, addr, pc);
+ if (resolved != pc)
+ pc = hppa32_convert_from_func_ptr_addr (gdbarch, resolved, targ);
+
+ return pc;
+}
/* Forward declarations. */
extern initialize_file_ftype _initialize_hppa_linux_tdep;
@@ -554,6 +569,10 @@ hppa_linux_init_abi (struct gdbarch_info
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+
+ if (tdep->bytes_per_address == 4)
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ hppa32_linux_convert_from_func_ptr_addr);
}
void
Index: gdb-7.0.1/gdb/hppa-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/hppa-tdep.c 2009-09-13 18:28:28.000000000 +0200
+++ gdb-7.0.1/gdb/hppa-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -1247,7 +1247,7 @@ hppa64_return_value (struct gdbarch *gdb
}
-static CORE_ADDR
+CORE_ADDR
hppa32_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
struct target_ops *targ)
{
Index: gdb-7.0.1/gdb/hppa-tdep.h
===================================================================
--- gdb-7.0.1.orig/gdb/hppa-tdep.h 2009-07-02 19:25:54.000000000 +0200
+++ gdb-7.0.1/gdb/hppa-tdep.h 2010-01-21 20:45:32.000000000 +0100
@@ -246,4 +246,8 @@ extern int hppa_in_solib_call_trampoline
CORE_ADDR pc, char *name);
extern CORE_ADDR hppa_skip_trampoline_code (struct frame_info *, CORE_ADDR pc);
+extern CORE_ADDR hppa32_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
+ CORE_ADDR addr,
+ struct target_ops *targ);
+
#endif /* hppa-tdep.h */
Index: gdb-7.0.1/gdb/i386-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/i386-linux-tdep.c 2009-09-21 08:57:03.000000000 +0200
+++ gdb-7.0.1/gdb/i386-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -798,6 +798,9 @@ i386_linux_init_abi (struct gdbarch_info
i386_linux_get_syscall_number);
set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/ia64-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/ia64-linux-tdep.c 2009-07-02 19:25:55.000000000 +0200
+++ gdb-7.0.1/gdb/ia64-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -26,6 +26,7 @@
#include "osabi.h"
#include "solib-svr4.h"
#include "symtab.h"
+#include "linux-tdep.h"
/* The sigtramp code is in a non-readable (executable-only) region
of memory called the ``gate page''. The addresses in question
@@ -139,6 +140,9 @@ ia64_linux_init_abi (struct gdbarch_info
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/infcall.c
===================================================================
--- gdb-7.0.1.orig/gdb/infcall.c 2010-01-21 20:45:21.000000000 +0100
+++ gdb-7.0.1/gdb/infcall.c 2010-01-21 20:45:32.000000000 +0100
@@ -252,9 +252,17 @@ find_function_addr (struct value *functi
if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
|| TYPE_CODE (ftype) == TYPE_CODE_METHOD)
{
- funaddr = gdbarch_convert_from_func_ptr_addr (gdbarch, funaddr,
- ¤t_target);
- value_type = TYPE_TARGET_TYPE (ftype);
+ CORE_ADDR funaddr2;
+
+ funaddr2 = gdbarch_convert_from_func_ptr_addr (gdbarch, funaddr,
+ ¤t_target);
+
+ /* If TYPE_GNU_IFUNC is currently not resolvable keep its type. */
+ if (funaddr2 != funaddr || !TYPE_GNU_IFUNC (ftype))
+ {
+ funaddr = funaddr2;
+ value_type = TYPE_TARGET_TYPE (ftype);
+ }
}
}
else if (code == TYPE_CODE_INT)
Index: gdb-7.0.1/gdb/linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/linux-tdep.c 2010-01-21 20:45:22.000000000 +0100
+++ gdb-7.0.1/gdb/linux-tdep.c 2010-01-21 20:47:02.000000000 +0100
@@ -20,6 +20,9 @@
#include "defs.h"
#include "gdbtypes.h"
#include "linux-tdep.h"
+#include "value.h"
+#include "infcall.h"
+#include "target.h"
/* This function is suitable for architectures that don't
extend/override the standard siginfo structure. */
@@ -134,3 +136,43 @@ linux_get_siginfo_type (struct gdbarch *
return siginfo_type;
}
+
+/* Call gnu-ifunc to resolve breakpoint at its returned function. */
+
+CORE_ADDR
+linux_convert_from_func_and_ptr (struct gdbarch *gdbarch, CORE_ADDR func_ptr,
+ CORE_ADDR pc)
+{
+ struct type *func_func_type = builtin_type (gdbarch)->builtin_func_func;
+ struct minimal_symbol *msymbol;
+ struct value *function, *address;
+
+ if (!target_has_execution)
+ return pc;
+
+ msymbol = lookup_minimal_symbol_by_pc (func_ptr);
+ if (msymbol == NULL)
+ return pc;
+ if (MSYMBOL_TYPE (msymbol) != mst_text_gnu_ifunc)
+ return pc;
+
+ /* Not at the gnu-ifunc entry point? */
+ if (SYMBOL_VALUE_ADDRESS (msymbol) != func_ptr)
+ return pc;
+
+ function = allocate_value (func_func_type);
+ set_value_address (function, pc);
+
+ /* gnu-ifuncs have no arguments. FUNCTION is the code instruction address
+ while ADDRESS is a function descriptor. */
+ address = call_function_by_hand (function, 0, NULL);
+
+ return value_as_address (address);
+}
+
+CORE_ADDR
+linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
+ struct target_ops *targ)
+{
+ return linux_convert_from_func_and_ptr (gdbarch, addr, addr);
+}
Index: gdb-7.0.1/gdb/linux-tdep.h
===================================================================
--- gdb-7.0.1.orig/gdb/linux-tdep.h 2009-02-06 23:59:00.000000000 +0100
+++ gdb-7.0.1/gdb/linux-tdep.h 2010-01-21 20:45:32.000000000 +0100
@@ -22,4 +22,11 @@
struct type *linux_get_siginfo_type (struct gdbarch *);
+CORE_ADDR linux_convert_from_func_and_ptr (struct gdbarch *gdbarch,
+ CORE_ADDR func_ptr, CORE_ADDR pc);
+
+CORE_ADDR linux_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
+ CORE_ADDR addr,
+ struct target_ops *targ);
+
#endif /* linux-tdep.h */
Index: gdb-7.0.1/gdb/m32r-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/m32r-linux-tdep.c 2009-01-03 06:57:52.000000000 +0100
+++ gdb-7.0.1/gdb/m32r-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -30,6 +30,7 @@
#include "gdb_string.h"
#include "glibc-tdep.h"
+#include "linux-tdep.h"
#include "solib-svr4.h"
#include "symtab.h"
@@ -422,6 +423,9 @@ m32r_linux_init_abi (struct gdbarch_info
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/minsyms.c
===================================================================
--- gdb-7.0.1.orig/gdb/minsyms.c 2010-01-21 20:45:22.000000000 +0100
+++ gdb-7.0.1/gdb/minsyms.c 2010-01-21 20:45:32.000000000 +0100
@@ -331,8 +331,9 @@ lookup_minimal_symbol_text (const char *
msymbol = msymbol->hash_next)
{
if (strcmp (SYMBOL_LINKAGE_NAME (msymbol), name) == 0 &&
- (MSYMBOL_TYPE (msymbol) == mst_text ||
- MSYMBOL_TYPE (msymbol) == mst_file_text))
+ (MSYMBOL_TYPE (msymbol) == mst_text
+ || MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc
+ || MSYMBOL_TYPE (msymbol) == mst_file_text))
{
switch (MSYMBOL_TYPE (msymbol))
{
@@ -699,6 +700,16 @@ lookup_minimal_symbol_by_pc (CORE_ADDR p
{
return lookup_minimal_symbol_by_pc_section (pc, NULL);
}
+
+/* Return non-zero iff PC is in function implementing gnu-ifunc selection. */
+
+int
+in_gnu_ifunc_stub (CORE_ADDR pc)
+{
+ struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc);
+
+ return msymbol && MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc;
+}
/* Return leading symbol character for a BFD. If BFD is NULL,
@@ -738,6 +749,7 @@ prim_record_minimal_symbol (const char *
switch (ms_type)
{
case mst_text:
+ case mst_text_gnu_ifunc:
case mst_file_text:
case mst_solib_trampoline:
section = SECT_OFF_TEXT (objfile);
@@ -1184,7 +1196,8 @@ find_solib_trampoline_target (struct fra
{
ALL_MSYMBOLS (objfile, msymbol)
{
- if (MSYMBOL_TYPE (msymbol) == mst_text
+ if ((MSYMBOL_TYPE (msymbol) == mst_text
+ || MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc)
&& strcmp (SYMBOL_LINKAGE_NAME (msymbol),
SYMBOL_LINKAGE_NAME (tsymbol)) == 0)
return SYMBOL_VALUE_ADDRESS (msymbol);
Index: gdb-7.0.1/gdb/mips-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/mips-linux-tdep.c 2009-07-02 19:25:55.000000000 +0200
+++ gdb-7.0.1/gdb/mips-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -38,6 +38,7 @@
#include "target-descriptions.h"
#include "mips-linux-tdep.h"
#include "glibc-tdep.h"
+#include "linux-tdep.h"
static struct target_so_ops mips_svr4_so_ops;
@@ -1225,6 +1226,9 @@ mips_linux_init_abi (struct gdbarch_info
tdesc_numbered_register (feature, tdesc_data, MIPS_RESTART_REGNUM,
"restart");
}
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/mn10300-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/mn10300-linux-tdep.c 2009-02-22 02:02:19.000000000 +0100
+++ gdb-7.0.1/gdb/mn10300-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -32,6 +32,7 @@
#include "frame.h"
#include "trad-frame.h"
#include "tramp-frame.h"
+#include "linux-tdep.h"
#include <stdlib.h>
@@ -718,6 +719,9 @@ am33_linux_init_osabi (struct gdbarch_in
tramp_frame_prepend_unwinder (gdbarch, &am33_linux_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &am33_linux_rt_sigframe);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/parse.c
===================================================================
--- gdb-7.0.1.orig/gdb/parse.c 2010-01-21 20:45:22.000000000 +0100
+++ gdb-7.0.1/gdb/parse.c 2010-01-21 20:45:32.000000000 +0100
@@ -517,6 +517,11 @@ write_exp_msymbol (struct minimal_symbol
write_exp_elt_type (objfile_type (objfile)->nodebug_text_symbol);
break;
+ case mst_text_gnu_ifunc:
+ write_exp_elt_type (objfile_type (objfile)
+ ->nodebug_text_gnu_ifunc_symbol);
+ break;
+
case mst_data:
case mst_file_data:
case mst_bss:
Index: gdb-7.0.1/gdb/ppc-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/ppc-linux-tdep.c 2009-09-15 05:30:06.000000000 +0200
+++ gdb-7.0.1/gdb/ppc-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -48,6 +48,7 @@
#include "arch-utils.h"
#include "spu-tdep.h"
#include "xml-syscall.h"
+#include "linux-tdep.h"
#include "features/rs6000/powerpc-32l.c"
#include "features/rs6000/powerpc-altivec32l.c"
@@ -672,8 +673,19 @@ ppc64_linux_convert_from_func_ptr_addr (
res = bfd_get_section_contents (s->bfd, s->the_bfd_section,
&buf, addr - s->addr, 8);
if (res != 0)
- return extract_unsigned_integer (buf, 8, byte_order)
- - bfd_section_vma (s->bfd, s->the_bfd_section) + s->addr;
+ {
+ CORE_ADDR pc, resolved;
+
+ pc = extract_unsigned_integer (buf, 8, byte_order)
+ - bfd_section_vma (s->bfd, s->the_bfd_section) + s->addr;
+
+ resolved = linux_convert_from_func_and_ptr (gdbarch, addr, pc);
+ if (resolved != pc)
+ pc = ppc64_linux_convert_from_func_ptr_addr (gdbarch, resolved,
+ targ);
+
+ return pc;
+ }
}
return addr;
Index: gdb-7.0.1/gdb/solib-svr4.c
===================================================================
--- gdb-7.0.1.orig/gdb/solib-svr4.c 2010-01-21 20:45:23.000000000 +0100
+++ gdb-7.0.1/gdb/solib-svr4.c 2010-01-21 20:46:04.000000000 +0100
@@ -1250,7 +1250,8 @@ svr4_in_dynsym_resolve_code (CORE_ADDR p
{
return ((pc >= interp_text_sect_low && pc < interp_text_sect_high)
|| (pc >= interp_plt_sect_low && pc < interp_plt_sect_high)
- || in_plt_section (pc, NULL));
+ || in_plt_section (pc, NULL)
+ || in_gnu_ifunc_stub (pc));
}
/* Given an executable's ABFD and target, compute the entry-point
Index: gdb-7.0.1/gdb/sparc-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/sparc-linux-tdep.c 2009-07-02 19:25:58.000000000 +0200
+++ gdb-7.0.1/gdb/sparc-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -32,6 +32,7 @@
#include "symtab.h"
#include "trad-frame.h"
#include "tramp-frame.h"
+#include "linux-tdep.h"
#include "sparc-tdep.h"
@@ -279,6 +280,9 @@ sparc32_linux_init_abi (struct gdbarch_i
dwarf2_append_unwinders (gdbarch);
set_gdbarch_write_pc (gdbarch, sparc_linux_write_pc);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
Index: gdb-7.0.1/gdb/sparc64-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/sparc64-linux-tdep.c 2009-07-02 19:25:58.000000000 +0200
+++ gdb-7.0.1/gdb/sparc64-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -31,6 +31,7 @@
#include "symtab.h"
#include "trad-frame.h"
#include "tramp-frame.h"
+#include "linux-tdep.h"
#include "sparc64-tdep.h"
@@ -244,6 +245,9 @@ sparc64_linux_init_abi (struct gdbarch_i
tdep->step_trap = sparc64_linux_step_trap;
set_gdbarch_write_pc (gdbarch, sparc64_linux_write_pc);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
Index: gdb-7.0.1/gdb/symmisc.c
===================================================================
--- gdb-7.0.1.orig/gdb/symmisc.c 2010-01-21 20:45:22.000000000 +0100
+++ gdb-7.0.1/gdb/symmisc.c 2010-01-21 20:45:32.000000000 +0100
@@ -287,6 +287,9 @@ dump_msymbols (struct objfile *objfile,
case mst_text:
ms_type = 'T';
break;
+ case mst_text_gnu_ifunc:
+ ms_type = 'i';
+ break;
case mst_solib_trampoline:
ms_type = 'S';
break;
Index: gdb-7.0.1/gdb/symtab.c
===================================================================
--- gdb-7.0.1.orig/gdb/symtab.c 2010-01-21 20:45:22.000000000 +0100
+++ gdb-7.0.1/gdb/symtab.c 2010-01-21 20:45:32.000000000 +0100
@@ -3160,7 +3160,7 @@ search_symbols (char *regexp, domain_enu
{mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown};
static enum minimal_symbol_type types4[]
=
- {mst_file_bss, mst_text, mst_abs, mst_unknown};
+ {mst_file_bss, mst_text_gnu_ifunc, mst_abs, mst_unknown};
enum minimal_symbol_type ourtype;
enum minimal_symbol_type ourtype2;
enum minimal_symbol_type ourtype3;
Index: gdb-7.0.1/gdb/symtab.h
===================================================================
--- gdb-7.0.1.orig/gdb/symtab.h 2010-01-21 20:45:21.000000000 +0100
+++ gdb-7.0.1/gdb/symtab.h 2010-01-21 20:45:32.000000000 +0100
@@ -275,6 +275,8 @@ enum minimal_symbol_type
{
mst_unknown = 0, /* Unknown type, the default */
mst_text, /* Generally executable instructions */
+ mst_text_gnu_ifunc, /* Executable code returning address
+ of executable code */
mst_data, /* Generally initialized data */
mst_bss, /* Generally uninitialized data */
mst_abs, /* Generally absolute (nonrelocatable) */
@@ -1149,6 +1151,8 @@ extern struct minimal_symbol *lookup_min
extern struct minimal_symbol *lookup_minimal_symbol_by_pc (CORE_ADDR);
+extern int in_gnu_ifunc_stub (CORE_ADDR pc);
+
extern struct minimal_symbol
*lookup_minimal_symbol_by_pc_section (CORE_ADDR, struct obj_section *);
Index: gdb-7.0.1/gdb/testsuite/gdb.base/gnu-ifunc-lib.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.0.1/gdb/testsuite/gdb.base/gnu-ifunc-lib.c 2010-01-21 20:45:32.000000000 +0100
@@ -0,0 +1,54 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2009 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <assert.h>
+
+typedef int (*final_t) (int arg);
+
+static int
+init_stub (int arg)
+{
+ return 0;
+}
+
+static int
+final (int arg)
+{
+ return arg + 1;
+}
+
+static volatile int gnu_ifunc_initialized;
+
+void
+gnu_ifunc_pre (void)
+{
+ assert (!gnu_ifunc_initialized);
+
+ gnu_ifunc_initialized = 1;
+}
+
+final_t gnu_ifuncX (void) asm ("gnu_ifunc");
+asm (".type gnu_ifunc, @gnu_indirect_function");
+
+final_t
+gnu_ifuncX (void)
+{
+ if (!gnu_ifunc_initialized)
+ return init_stub;
+ else
+ return final;
+}
Index: gdb-7.0.1/gdb/testsuite/gdb.base/gnu-ifunc.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.0.1/gdb/testsuite/gdb.base/gnu-ifunc.c 2010-01-21 20:45:32.000000000 +0100
@@ -0,0 +1,36 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2009 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <assert.h>
+
+extern int gnu_ifunc (int arg);
+extern void gnu_ifunc_pre (void);
+
+int
+main (void)
+{
+ int i;
+
+ gnu_ifunc_pre ();
+
+ i = gnu_ifunc (1); /* break-at-call */
+ assert (i == 2);
+
+ gnu_ifunc (2); /* break-at-nextcall */
+
+ return 0; /* break-at-exit */
+}
Index: gdb-7.0.1/gdb/testsuite/gdb.base/gnu-ifunc.exp
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.0.1/gdb/testsuite/gdb.base/gnu-ifunc.exp 2010-01-21 20:45:32.000000000 +0100
@@ -0,0 +1,115 @@
+# Copyright (C) 2009 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+if {[skip_shlib_tests]} {
+ return 0
+}
+
+set testfile "gnu-ifunc"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+set libfile "${testfile}-lib"
+set libsrc ${libfile}.c
+set lib_so ${objdir}/${subdir}/${libfile}.so
+
+set lib_nodebug_so_base ${libfile}-nodebug.so
+set lib_nodebug_so ${objdir}/${subdir}/${lib_nodebug_so_base}
+
+# {debug} provides DWARF symbol gnu_ifuncX confusing the ELF symbol
+# gnu_ifunc during address->symbol resolution for printing the symbol.
+# Still we need it here for "step"ping into the function.
+set lib_opts [list debug]
+set lib_nodebug_opts [list]
+set exec_opts [list debug shlib=$lib_so]
+
+if [get_compiler_info ${binfile}] {
+ return -1
+}
+
+if { [gdb_compile_shlib ${srcdir}/${subdir}/$libsrc $lib_so $lib_opts] != ""
+ || [gdb_compile ${srcdir}/${subdir}/$srcfile $binfile executable $exec_opts] != ""} {
+ untested "Could not compile either $libsrc or $srcfile."
+ return -1
+}
+
+# Start with a fresh gdb.
+
+clean_restart $testfile
+gdb_load_shlibs ${lib_so}
+
+if ![runto_main] then {
+ fail "Can't run to main"
+ return 1;
+}
+
+# The "if" condition is artifical to test regression of a format patch.
+gdb_breakpoint "[gdb_get_line_number "break-at-nextcall"] if i && gnu_ifunc (i) != 42"
+
+gdb_breakpoint [gdb_get_line_number "break-at-call"]
+gdb_continue_to_breakpoint "break-at-call" ".*break-at-call.*"
+
+# Test GDB will automatically indirect the call.
+
+gdb_test "p gnu_ifunc (3)" " = 4"
+
+# Test GDB will skip the gnu_ifunc resolver on first call.
+
+gdb_test "step" "\r\nfinal .*"
+
+# Test GDB will not break before the final chosen implementation.
+
+# Also test a format patch regression:
+# Continuing.
+# Error in testing breakpoint condition:
+# Attempt to take address of value not located in memory.
+#
+# Breakpoint 2, main () at ./gdb.base/gnu-ifunc.c:33
+
+gdb_test "continue" "Continuing.\r\n\r\nBreakpoint .* (at|in) .*break-at-nextcall.*" \
+ "continue to break-at-nextcall"
+
+gdb_breakpoint "gnu_ifunc"
+
+gdb_continue_to_breakpoint "nextcall gnu_ifunc"
+
+gdb_test "frame" "#0 +(0x\[0-9a-f\]+ in +)?final \\(.*" "nextcall gnu_ifunc skipped"
+
+
+# Compare the two different addresses:
+
+gdb_test "p gnu_ifunc" " = {<text variable, no debug info>} 0x\[0-9a-f\]+ <final>" "p gnu_ifunc executing"
+gdb_test "info sym gnu_ifunc" "final in section .*" "info sym gnu_ifunc executing"
+
+set test "info addr gnu_ifunc"
+gdb_test_multiple $test $test {
+ -re "Symbol \"gnu_ifunc\" is at (0x\[0-9a-f\]+) in .*$gdb_prompt $" {
+ pass $test
+ }
+}
+gdb_test "info sym $expect_out(1,string)" "gnu_ifunc in section .*" "info sym <gnu_ifunc-address>"
+
+# <*gnu_ifunc> would be an incorrect resolution from DW_AT_MIPS_linkage_name.
+# We do not use {debug} build option for this purpose.
+
+if { [gdb_compile_shlib ${srcdir}/${subdir}/$libsrc $lib_nodebug_so $lib_nodebug_opts] != ""} {
+ untested "Could not compile either $libsrc."
+ return -1
+}
+
+clean_restart $lib_nodebug_so_base
+
+gdb_test "p gnu_ifunc" " = {<text gnu-ifunc variable, no debug info>} 0x\[0-9a-f\]+ <gnu_ifunc>" "p gnu_ifunc not executing without debug"
+gdb_test "info sym gnu_ifunc" "gnu_ifunc in section .*" "info sym gnu_ifunc not executing without debug"
Index: gdb-7.0.1/gdb/xtensa-linux-tdep.c
===================================================================
--- gdb-7.0.1.orig/gdb/xtensa-linux-tdep.c 2009-02-22 02:02:20.000000000 +0100
+++ gdb-7.0.1/gdb/xtensa-linux-tdep.c 2010-01-21 20:45:32.000000000 +0100
@@ -22,6 +22,7 @@
#include "solib-svr4.h"
#include "symtab.h"
+#include "linux-tdep.h"
/* OS specific initialization of gdbarch. */
@@ -30,6 +31,9 @@ xtensa_linux_init_abi (struct gdbarch_in
{
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ linux_convert_from_func_ptr_addr);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
--- gdb-7.0.1/gdb/configure.tgt-orig 2009-08-06 12:28:38.000000000 +0200
+++ gdb-7.0.1/gdb/configure.tgt 2010-01-21 21:28:38.000000000 +0100
@@ -374,7 +374,7 @@ powerpc-*-aix* | rs6000-*-*)
;;
powerpc-*-linux* | powerpc64-*-linux*)
# Target: PowerPC running Linux
- gdb_target_obs="rs6000-tdep.o ppc-linux-tdep.o ppc-sysv-tdep.o \
+ gdb_target_obs="rs6000-tdep.o ppc-linux-tdep.o linux-tdep.o ppc-sysv-tdep.o \
solib.o solib-svr4.o solib-spu.o spu-multiarch.o \
corelow.o symfile-mem.o"
gdb_sim=../sim/ppc/libsim.a