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authorJan Kratochvil <jan.kratochvil@redhat.com>2014-05-14 14:08:57 -0600
committerJan Kratochvil <jan.kratochvil@redhat.com>2014-12-12 22:25:37 +0100
commitf208eee0f3a4f42a0bf20ab900eb36fbba8e4b9e (patch)
tree8984185ee57c14d23c39794558eda58f36659887
parent233a8fb382c88d7faa6da1cd93a7e21b77e36df4 (diff)
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add infcall_mmap and gcc_target_options gdbarch methods
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.
-rw-r--r--gdb/ChangeLog11
-rw-r--r--gdb/arch-utils.c16
-rw-r--r--gdb/arch-utils.h9
-rw-r--r--gdb/gdbarch.c46
-rw-r--r--gdb/gdbarch.h17
-rwxr-xr-xgdb/gdbarch.sh11
6 files changed, 110 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d7f0c2d..b310769 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,16 @@
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
fields.
(pop_dummy_frame): Call the destructor if it exists.
diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c
index 33d5543..3cd0a21 100644
--- a/gdb/arch-utils.c
+++ b/gdb/arch-utils.c
@@ -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;
diff --git a/gdb/arch-utils.h b/gdb/arch-utils.h
index 11e68e2..e1d2c4a 100644
--- a/gdb/arch-utils.h
+++ b/gdb/arch-utils.h
@@ -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
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index 132fff3..d815a1c 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -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)
@@ -912,6 +918,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *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));
fprintf_unfiltered (file,
@@ -978,6 +987,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *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));
fprintf_unfiltered (file,
@@ -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. */
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index ba4fe62..d086553 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -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)
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 25544e3..8f4cd69 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -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
}