/* Frame unwinder for ia64 frames using the libunwind library.
- Copyright (C) 2003-2018 Free Software Foundation, Inc.
+ Copyright (C) 2003-2021 Free Software Foundation, Inc.
Written by Jeff Johnston, contributed by Red Hat Inc.
#include "ia64-libunwind-tdep.h"
#include "complaints.h"
-#include "common/preprocessor.h"
+#include "gdbsupport/preprocessor.h"
/* IA-64 is the only target that currently uses ia64-libunwind-tdep.
Note how UNW_TARGET, UNW_OBJ, etc. are compile time constants below.
#define LIBUNWIND_SO_7 "libunwind-" STRINGIFY(UNW_TARGET) ".so.7"
#endif
-static char *get_reg_name = STRINGIFY(UNW_OBJ(get_reg));
-static char *get_fpreg_name = STRINGIFY(UNW_OBJ(get_fpreg));
-static char *get_saveloc_name = STRINGIFY(UNW_OBJ(get_save_loc));
-static char *is_signal_frame_name = STRINGIFY(UNW_OBJ(is_signal_frame));
-static char *step_name = STRINGIFY(UNW_OBJ(step));
-static char *init_remote_name = STRINGIFY(UNW_OBJ(init_remote));
-static char *create_addr_space_name = STRINGIFY(UNW_OBJ(create_addr_space));
-static char *destroy_addr_space_name = STRINGIFY(UNW_OBJ(destroy_addr_space));
-static char *search_unwind_table_name
+static const char *get_reg_name = STRINGIFY(UNW_OBJ(get_reg));
+static const char *get_fpreg_name = STRINGIFY(UNW_OBJ(get_fpreg));
+static const char *get_saveloc_name = STRINGIFY(UNW_OBJ(get_save_loc));
+static const char *is_signal_frame_name = STRINGIFY(UNW_OBJ(is_signal_frame));
+static const char *step_name = STRINGIFY(UNW_OBJ(step));
+static const char *init_remote_name = STRINGIFY(UNW_OBJ(init_remote));
+static const char *create_addr_space_name
+ = STRINGIFY(UNW_OBJ(create_addr_space));
+static const char *destroy_addr_space_name
+ = STRINGIFY(UNW_OBJ(destroy_addr_space));
+static const char *search_unwind_table_name
= STRINGIFY(UNW_OBJ(search_unwind_table));
-static char *find_dyn_list_name = STRINGIFY(UNW_OBJ(find_dyn_list));
+static const char *find_dyn_list_name = STRINGIFY(UNW_OBJ(find_dyn_list));
static struct libunwind_descr *
libunwind_descr (struct gdbarch *gdbarch)
}
static void *
-libunwind_descr_init (struct gdbarch *gdbarch)
+libunwind_descr_init (struct obstack *obstack)
{
struct libunwind_descr *descr
- = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct libunwind_descr);
+ = OBSTACK_ZALLOC (obstack, struct libunwind_descr);
return descr;
}
arch_descr = ((struct libunwind_descr *)
gdbarch_data (gdbarch, libunwind_descr_handle));
-
- if (arch_descr == NULL)
- {
- /* First time here. Must initialize data area. */
- arch_descr = (struct libunwind_descr *) libunwind_descr_init (gdbarch);
- deprecated_set_gdbarch_data (gdbarch,
- libunwind_descr_handle, arch_descr);
- }
+ gdb_assert (arch_descr != NULL);
/* Copy new descriptor info into arch descriptor. */
arch_descr->gdb2uw = descr->gdb2uw;
struct libunwind_frame_cache *cache;
struct libunwind_descr *descr;
struct gdbarch *gdbarch = get_frame_arch (this_frame);
- int i, ret;
+ int ret;
if (*this_cache)
return (struct libunwind_frame_cache *) *this_cache;
The best we can do, in that case, is use the frame PC as the function
address. We don't need to give up since we still have the unwind
record to help us perform the unwinding. There is also another
- compelling to continue, because abandonning now means stopping
+ compelling to continue, because abandoning now means stopping
the backtrace, which can never be helpful for the user. */
cache->func_addr = get_frame_pc (this_frame);
libunwind frame unwinding. */
int
libunwind_frame_sniffer (const struct frame_unwind *self,
- struct frame_info *this_frame, void **this_cache)
+ struct frame_info *this_frame, void **this_cache)
{
unw_cursor_t cursor;
unw_accessors_t *acc;
unw_addr_space_t as;
struct libunwind_descr *descr;
struct gdbarch *gdbarch = get_frame_arch (this_frame);
- int i, ret;
+ int ret;
/* To test for libunwind unwind support, initialize a cursor to
the current frame and try to back up. We use this same method
void
libunwind_frame_this_id (struct frame_info *this_frame, void **this_cache,
- struct frame_id *this_id)
+ struct frame_id *this_id)
{
struct libunwind_frame_cache *cache =
libunwind_frame_cache (this_frame, this_cache);
struct value *
libunwind_frame_prev_register (struct frame_info *this_frame,
- void **this_cache, int regnum)
+ void **this_cache, int regnum)
{
struct libunwind_frame_cache *cache =
libunwind_frame_cache (this_frame, this_cache);
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- void *ptr;
- unw_cursor_t *c;
unw_save_loc_t sl;
- int i, ret;
+ int ret;
unw_word_t intval;
unw_fpreg_t fpval;
unw_regnum_t uw_regnum;
gdb_assert (regnum >= 0);
- if (!target_has_registers)
+ if (!target_has_registers ())
error (_("No registers."));
if (uw_regnum < 0)
case UNW_SLT_REG:
val = frame_unwind_got_register (this_frame, regnum,
- descr->uw2gdb (sl.u.regnum));
+ descr->uw2gdb (sl.u.regnum));
break;
case UNW_SLT_NONE:
{
- /* The register is not stored at a specific memory address nor
- inside another register. So use libunwind to fetch the register
- value for us, and create a constant value with the result. */
- if (descr->is_fpreg (uw_regnum))
- {
- ret = unw_get_fpreg_p (&cache->cursor, uw_regnum, &fpval);
- if (ret < 0)
- return frame_unwind_got_constant (this_frame, regnum, 0);
- val = frame_unwind_got_bytes (this_frame, regnum,
- (gdb_byte *) &fpval);
- }
- else
- {
- ret = unw_get_reg_p (&cache->cursor, uw_regnum, &intval);
- if (ret < 0)
- return frame_unwind_got_constant (this_frame, regnum, 0);
- val = frame_unwind_got_constant (this_frame, regnum, intval);
- }
- break;
+ /* The register is not stored at a specific memory address nor
+ inside another register. So use libunwind to fetch the register
+ value for us, and create a constant value with the result. */
+ if (descr->is_fpreg (uw_regnum))
+ {
+ ret = unw_get_fpreg_p (&cache->cursor, uw_regnum, &fpval);
+ if (ret < 0)
+ return frame_unwind_got_constant (this_frame, regnum, 0);
+ val = frame_unwind_got_bytes (this_frame, regnum,
+ (gdb_byte *) &fpval);
+ }
+ else
+ {
+ ret = unw_get_reg_p (&cache->cursor, uw_regnum, &intval);
+ if (ret < 0)
+ return frame_unwind_got_constant (this_frame, regnum, 0);
+ val = frame_unwind_got_constant (this_frame, regnum, intval);
+ }
+ break;
}
}
/* Verify if we are in a sigtramp frame and we can use libunwind to unwind. */
int
libunwind_sigtramp_frame_sniffer (const struct frame_unwind *self,
- struct frame_info *this_frame,
- void **this_cache)
+ struct frame_info *this_frame,
+ void **this_cache)
{
unw_cursor_t cursor;
unw_accessors_t *acc;
unw_addr_space_t as;
struct libunwind_descr *descr;
struct gdbarch *gdbarch = get_frame_arch (this_frame);
- int i, ret;
+ int ret;
/* To test for libunwind unwind support, initialize a cursor to the
current frame and try to back up. We use this same method when
are usually located at BOF, this is not always true and only the libunwind
info can decipher where they actually are. */
int
-libunwind_get_reg_special (struct gdbarch *gdbarch, struct regcache *regcache,
+libunwind_get_reg_special (struct gdbarch *gdbarch, readable_regcache *regcache,
int regnum, void *buf)
{
unw_cursor_t cursor;
return libunwind_initialized;
}
+void _initialize_libunwind_frame ();
void
-_initialize_libunwind_frame (void)
+_initialize_libunwind_frame ()
{
libunwind_descr_handle
- = gdbarch_data_register_post_init (libunwind_descr_init);
+ = gdbarch_data_register_pre_init (libunwind_descr_init);
libunwind_initialized = libunwind_load ();
}
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