mirrors/binutils-gdb
0
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2025-01-20 15:03:31 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

add infcall_mmap and gcc_target_options gdbarch methods

Browse Source 
The compiler needed two new gdbarch methods.

The infcall_mmap method allocates memory in the inferior.
This is used when inserting the object code.

The gcc_target_options method computes some arch-specific gcc options
to pass to the compiler.  This is used to ensure that gcc generates
object code for the correct architecture.

gdb/ChangeLog
2014-12-12  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* arch-utils.c (default_infcall_mmap)
	(default_gcc_target_options): New functions.
	* arch-utils.h (GDB_MMAP_PROT_READ, GDB_MMAP_PROT_WRITE)
	(GDB_MMAP_PROT_EXEC): Define.
	(default_infcall_mmap, default_gcc_target_options): Declare.
	* gdbarch.h: Rebuild.
	* gdbarch.c: Rebuild.
	* gdbarch.sh (infcall_mmap, gcc_target_options): New methods.
This commit is contained in:
Jan Kratochvil 2014-05-14 14:08:57 -06:00
parent 233a8fb382
commit f208eee0f3
6 changed files with 110 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
gdb/ChangeLog
View File

@ -1,3 +1,14 @@
2014-12-12 Jan Kratochvil <jan.kratochvil@redhat.com>
* arch-utils.c (default_infcall_mmap)
(default_gcc_target_options): New functions.
* arch-utils.h (GDB_MMAP_PROT_READ, GDB_MMAP_PROT_WRITE)
(GDB_MMAP_PROT_EXEC): Define.
(default_infcall_mmap, default_gcc_target_options): Declare.
* gdbarch.h: Rebuild.
* gdbarch.c: Rebuild.
* gdbarch.sh (infcall_mmap, gcc_target_options): New methods.
2014-12-12 Jan Kratochvil <jan.kratochvil@redhat.com>
* dummy-frame.c (struct dummy_frame) <dtor, dtor_data>: New

16
gdb/arch-utils.c
View File

@ -858,6 +858,22 @@ default_skip_permanent_breakpoint (struct regcache *regcache)
regcache_write_pc (regcache, current_pc);
}
CORE_ADDR
default_infcall_mmap (CORE_ADDR size, unsigned prot)
{
error (_("This target does not support inferior memory allocation by mmap."));
}
/* -mcmodel=large is used so that no GOT (Global Offset Table) is needed to be
created in inferior memory by GDB (normally it is set by ld.so). */
char *
default_gcc_target_options (struct gdbarch *gdbarch)
{
return xstrprintf ("-m%d%s", gdbarch_ptr_bit (gdbarch),
gdbarch_ptr_bit (gdbarch) == 64 ? " -mcmodel=large" : "");
}
/* -Wmissing-prototypes */
extern initialize_file_ftype _initialize_gdbarch_utils;

9
gdb/arch-utils.h
View File

@ -193,4 +193,13 @@ extern int default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *ra
module determines whether a breakpoint is permanent. */
extern void default_skip_permanent_breakpoint (struct regcache *regcache);
/* Symbols for gdbarch_infcall_mmap; their Linux PROT_* system
definitions would be dependent on compilation host. */
#define GDB_MMAP_PROT_READ 0x1 /* Page can be read. */
#define GDB_MMAP_PROT_WRITE 0x2 /* Page can be written. */
#define GDB_MMAP_PROT_EXEC 0x4 /* Page can be executed. */
extern CORE_ADDR default_infcall_mmap (CORE_ADDR size, unsigned prot);
extern char *default_gcc_target_options (struct gdbarch *gdbarch);
#endif

46
gdb/gdbarch.c
View File

@ -321,6 +321,8 @@ struct gdbarch
gdbarch_insn_is_jump_ftype *insn_is_jump;
gdbarch_auxv_parse_ftype *auxv_parse;
gdbarch_vsyscall_range_ftype *vsyscall_range;
gdbarch_infcall_mmap_ftype *infcall_mmap;
gdbarch_gcc_target_options_ftype *gcc_target_options;
};
/* Create a new ``struct gdbarch'' based on information provided by
@ -417,6 +419,8 @@ gdbarch_alloc (const struct gdbarch_info *info,
gdbarch->insn_is_ret = default_insn_is_ret;
gdbarch->insn_is_jump = default_insn_is_jump;
gdbarch->vsyscall_range = default_vsyscall_range;
gdbarch->infcall_mmap = default_infcall_mmap;
gdbarch->gcc_target_options = default_gcc_target_options;
/* gdbarch_alloc() */
return gdbarch;
@ -642,6 +646,8 @@ verify_gdbarch (struct gdbarch *gdbarch)
/* Skip verify of insn_is_jump, invalid_p == 0 */
/* Skip verify of auxv_parse, has predicate. */
/* Skip verify of vsyscall_range, invalid_p == 0 */
/* Skip verify of infcall_mmap, invalid_p == 0 */
/* Skip verify of gcc_target_options, invalid_p == 0 */
buf = ui_file_xstrdup (log, &length);
make_cleanup (xfree, buf);
if (length > 0)
@ -911,6 +917,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
fprintf_unfiltered (file,
"gdbarch_dump: frame_red_zone_size = %s\n",
plongest (gdbarch->frame_red_zone_size));
fprintf_unfiltered (file,
"gdbarch_dump: gcc_target_options = <%s>\n",
host_address_to_string (gdbarch->gcc_target_options));
fprintf_unfiltered (file,
"gdbarch_dump: gdbarch_gcore_bfd_target_p() = %d\n",
gdbarch_gcore_bfd_target_p (gdbarch));
@ -977,6 +986,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
fprintf_unfiltered (file,
"gdbarch_dump: in_solib_return_trampoline = <%s>\n",
host_address_to_string (gdbarch->in_solib_return_trampoline));
fprintf_unfiltered (file,
"gdbarch_dump: infcall_mmap = <%s>\n",
host_address_to_string (gdbarch->infcall_mmap));
fprintf_unfiltered (file,
"gdbarch_dump: gdbarch_info_proc_p() = %d\n",
gdbarch_info_proc_p (gdbarch));
@ -4519,6 +4531,40 @@ set_gdbarch_vsyscall_range (struct gdbarch *gdbarch,
gdbarch->vsyscall_range = vsyscall_range;
}
CORE_ADDR
gdbarch_infcall_mmap (struct gdbarch *gdbarch, CORE_ADDR size, unsigned prot)
{
gdb_assert (gdbarch != NULL);
gdb_assert (gdbarch->infcall_mmap != NULL);
if (gdbarch_debug >= 2)
fprintf_unfiltered (gdb_stdlog, "gdbarch_infcall_mmap called\n");
return gdbarch->infcall_mmap (size, prot);
}
void
set_gdbarch_infcall_mmap (struct gdbarch *gdbarch,
gdbarch_infcall_mmap_ftype infcall_mmap)
{
gdbarch->infcall_mmap = infcall_mmap;
}
char *
gdbarch_gcc_target_options (struct gdbarch *gdbarch)
{
gdb_assert (gdbarch != NULL);
gdb_assert (gdbarch->gcc_target_options != NULL);
if (gdbarch_debug >= 2)
fprintf_unfiltered (gdb_stdlog, "gdbarch_gcc_target_options called\n");
return gdbarch->gcc_target_options (gdbarch);
}
void
set_gdbarch_gcc_target_options (struct gdbarch *gdbarch,
gdbarch_gcc_target_options_ftype gcc_target_options)
{
gdbarch->gcc_target_options = gcc_target_options;
}
/* Keep a registry of per-architecture data-pointers required by GDB
modules. */

17
gdb/gdbarch.h
View File

@ -1390,6 +1390,23 @@ typedef int (gdbarch_vsyscall_range_ftype) (struct gdbarch *gdbarch, struct mem_
extern int gdbarch_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range);
extern void set_gdbarch_vsyscall_range (struct gdbarch *gdbarch, gdbarch_vsyscall_range_ftype *vsyscall_range);
/* Allocate SIZE bytes of PROT protected page aligned memory in inferior.
PROT has GDB_MMAP_PROT_* bitmask format.
Throw an error if it is not possible. Returned address is always valid. */
typedef CORE_ADDR (gdbarch_infcall_mmap_ftype) (CORE_ADDR size, unsigned prot);
extern CORE_ADDR gdbarch_infcall_mmap (struct gdbarch *gdbarch, CORE_ADDR size, unsigned prot);
extern void set_gdbarch_infcall_mmap (struct gdbarch *gdbarch, gdbarch_infcall_mmap_ftype *infcall_mmap);
/* Return string (caller has to use xfree for it) with options for GCC
to produce code for this target, typically "-m64", "-m32" or "-m31".
These options are put before CU's DW_AT_producer compilation options so that
they can override it. Method may also return NULL. */
typedef char * (gdbarch_gcc_target_options_ftype) (struct gdbarch *gdbarch);
extern char * gdbarch_gcc_target_options (struct gdbarch *gdbarch);
extern void set_gdbarch_gcc_target_options (struct gdbarch *gdbarch, gdbarch_gcc_target_options_ftype *gcc_target_options);
/* Definition for an unknown syscall, used basically in error-cases. */
#define UNKNOWN_SYSCALL (-1)

11
gdb/gdbarch.sh
View File

@ -1076,6 +1076,17 @@ M:int:auxv_parse:gdb_byte **readptr, gdb_byte *endptr, CORE_ADDR *typep, CORE_AD
# range with zero length is returned. Returns true if the vsyscall is
# found, false otherwise.
m:int:vsyscall_range:struct mem_range *range:range::default_vsyscall_range::0
# Allocate SIZE bytes of PROT protected page aligned memory in inferior.
# PROT has GDB_MMAP_PROT_* bitmask format.
# Throw an error if it is not possible. Returned address is always valid.
f:CORE_ADDR:infcall_mmap:CORE_ADDR size, unsigned prot:size, prot::default_infcall_mmap::0
# Return string (caller has to use xfree for it) with options for GCC
# to produce code for this target, typically "-m64", "-m32" or "-m31".
# These options are put before CU's DW_AT_producer compilation options so that
# they can override it. Method may also return NULL.
m:char *:gcc_target_options:void:::default_gcc_target_options::0
EOF
}