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gdbarch: add addressable_memory_unit_size method 

Add a new gdbarch method to get the length of an addressable memory unit
for a given architecture. The default implementation returns 1.

gdb/ChangeLog:

	* arch-utils.h (default_addressable_memory_unit_size): New.
	* arch-utils.c (default_addressable_memory_unit_size): New.
	* gdbarch.sh (addressable_memory_unit_size): New.
	* gdbarch.h: Re-generate.
	* gdbarch.c: Re-generate.
This commit is contained in:
Simon Marchi 2015-06-12 16:51:51 -04:00
parent 99a2c56121
commit 3374165f51
6 changed files with 55 additions and 0 deletions
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8
gdb/ChangeLog
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@ -1,3 +1,11 @@
2015-06-12 Simon Marchi <simon.marchi@ericsson.com>
* arch-utils.h (default_addressable_memory_unit_size): New.
* arch-utils.c (default_addressable_memory_unit_size): New.
* gdbarch.sh (addressable_memory_unit_size): New.
* gdbarch.h: Re-generate.
* gdbarch.c: Re-generate.
2015-06-12 Simon Marchi <simon.marchi@ericsson.com>
* target.c (target_read): Rename variables and use

9
gdb/arch-utils.c
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@ -888,6 +888,15 @@ default_gnu_triplet_regexp (struct gdbarch *gdbarch)
return gdbarch_bfd_arch_info (gdbarch)->arch_name;
}
/* Default method for gdbarch_addressable_memory_unit_size. By default, a memory byte has
a size of 1 octet. */
int
default_addressable_memory_unit_size (struct gdbarch *gdbarch)
{
return 1;
}
/* -Wmissing-prototypes */
extern initialize_file_ftype _initialize_gdbarch_utils;

1
gdb/arch-utils.h
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@ -203,5 +203,6 @@ extern CORE_ADDR default_infcall_mmap (CORE_ADDR size, unsigned prot);
extern void default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size);
extern char *default_gcc_target_options (struct gdbarch *gdbarch);
extern const char *default_gnu_triplet_regexp (struct gdbarch *gdbarch);
extern int default_addressable_memory_unit_size (struct gdbarch *gdbarch);
#endif

23
gdb/gdbarch.c
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@ -329,6 +329,7 @@ struct gdbarch
gdbarch_infcall_munmap_ftype *infcall_munmap;
gdbarch_gcc_target_options_ftype *gcc_target_options;
gdbarch_gnu_triplet_regexp_ftype *gnu_triplet_regexp;
gdbarch_addressable_memory_unit_size_ftype *addressable_memory_unit_size;
};
/* Create a new ``struct gdbarch'' based on information provided by
@ -430,6 +431,7 @@ gdbarch_alloc (const struct gdbarch_info *info,
gdbarch->infcall_munmap = default_infcall_munmap;
gdbarch->gcc_target_options = default_gcc_target_options;
gdbarch->gnu_triplet_regexp = default_gnu_triplet_regexp;
gdbarch->addressable_memory_unit_size = default_addressable_memory_unit_size;
/* gdbarch_alloc() */
return gdbarch;
@ -663,6 +665,7 @@ verify_gdbarch (struct gdbarch *gdbarch)
/* Skip verify of infcall_munmap, invalid_p == 0 */
/* Skip verify of gcc_target_options, invalid_p == 0 */
/* Skip verify of gnu_triplet_regexp, invalid_p == 0 */
/* Skip verify of addressable_memory_unit_size, invalid_p == 0 */
buf = ui_file_xstrdup (log, &length);
make_cleanup (xfree, buf);
if (length > 0)
@ -713,6 +716,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
fprintf_unfiltered (file,
"gdbarch_dump: address_to_pointer = <%s>\n",
host_address_to_string (gdbarch->address_to_pointer));
fprintf_unfiltered (file,
"gdbarch_dump: addressable_memory_unit_size = <%s>\n",
host_address_to_string (gdbarch->addressable_memory_unit_size));
fprintf_unfiltered (file,
"gdbarch_dump: gdbarch_adjust_breakpoint_address_p() = %d\n",
gdbarch_adjust_breakpoint_address_p (gdbarch));
@ -4730,6 +4736,23 @@ set_gdbarch_gnu_triplet_regexp (struct gdbarch *gdbarch,
gdbarch->gnu_triplet_regexp = gnu_triplet_regexp;
}
int
gdbarch_addressable_memory_unit_size (struct gdbarch *gdbarch)
{
gdb_assert (gdbarch != NULL);
gdb_assert (gdbarch->addressable_memory_unit_size != NULL);
if (gdbarch_debug >= 2)
fprintf_unfiltered (gdb_stdlog, "gdbarch_addressable_memory_unit_size called\n");
return gdbarch->addressable_memory_unit_size (gdbarch);
}
void
set_gdbarch_addressable_memory_unit_size (struct gdbarch *gdbarch,
gdbarch_addressable_memory_unit_size_ftype addressable_memory_unit_size)
{
gdbarch->addressable_memory_unit_size = addressable_memory_unit_size;
}
/* Keep a registry of per-architecture data-pointers required by GDB
modules. */

8
gdb/gdbarch.h
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@ -1466,6 +1466,14 @@ typedef const char * (gdbarch_gnu_triplet_regexp_ftype) (struct gdbarch *gdbarch
extern const char * gdbarch_gnu_triplet_regexp (struct gdbarch *gdbarch);
extern void set_gdbarch_gnu_triplet_regexp (struct gdbarch *gdbarch, gdbarch_gnu_triplet_regexp_ftype *gnu_triplet_regexp);
/* Return the size in 8-bit bytes of an addressable memory unit on this
architecture. This corresponds to the number of 8-bit bytes associated to
each address in memory. */
typedef int (gdbarch_addressable_memory_unit_size_ftype) (struct gdbarch *gdbarch);
extern int gdbarch_addressable_memory_unit_size (struct gdbarch *gdbarch);
extern void set_gdbarch_addressable_memory_unit_size (struct gdbarch *gdbarch, gdbarch_addressable_memory_unit_size_ftype *addressable_memory_unit_size);
/* Definition for an unknown syscall, used basically in error-cases. */
#define UNKNOWN_SYSCALL (-1)

6
gdb/gdbarch.sh
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@ -1113,6 +1113,12 @@ m:char *:gcc_target_options:void:::default_gcc_target_options::0
# returns the BFD architecture name, which is correct in nearly every
# case.
m:const char *:gnu_triplet_regexp:void:::default_gnu_triplet_regexp::0
# Return the size in 8-bit bytes of an addressable memory unit on this
# architecture. This corresponds to the number of 8-bit bytes associated to
# each address in memory.
m:int:addressable_memory_unit_size:void:::default_addressable_memory_unit_size::0
EOF
}