This is the mail archive of the
gdb-cvs@sourceware.org
mailing list for the GDB project.
[binutils-gdb(refs/for/public/siginfo_mpx)] Customize siginfo for ia architecture.
- From: Walfred Tedeschi <wtedeschi at sourceware dot org>
- To: gdb-cvs at sourceware dot org
- Date: 2 Dec 2015 10:27:52 -0000
- Subject: [binutils-gdb(refs/for/public/siginfo_mpx)] Customize siginfo for ia architecture.
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=05f2fd315044a7842b55e12ec14fa0cf6d3f3c73
commit 05f2fd315044a7842b55e12ec14fa0cf6d3f3c73
Author: Walfred Tedeschi <walfred.tedeschi@intel.com>
Date: Wed Dec 2 10:46:01 2015 +0100
Customize siginfo for ia architecture.
New kernel and glibc patches have introduced fields in the
segmentation fault fields.
Kernel patch:
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=ee1b58d36aa1b5a79eaba11f5c3633c88231da83
Glibc patch:
http://repo.or.cz/w/glibc.git/commit/d4358b51c26a634eb885955aea06cad26af6f696
2015-07-21 Walfred Tedeschi <walfred.tedeschi@intel.com>
* linux-tdep.c (linux_get_siginfo_type): Add the _addr_bnd
structure to the siginfo.
Signed-off-by: Walfred Tedeschi <walfred.tedeschi@intel.com>
Diff:
---
gdb/amd64-linux-tdep.c | 5 ++
gdb/i386-linux-tdep.c | 131 +++++++++++++++++++++++++++++++++++++++++++++++++
gdb/i386-linux-tdep.h | 2 +
3 files changed, 138 insertions(+)
diff --git a/gdb/amd64-linux-tdep.c b/gdb/amd64-linux-tdep.c
index ee21635..ada0dbe 100644
--- a/gdb/amd64-linux-tdep.c
+++ b/gdb/amd64-linux-tdep.c
@@ -1838,6 +1838,8 @@ amd64_linux_init_abi_common(struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_process_record (gdbarch, i386_process_record);
set_gdbarch_process_record_signal (gdbarch, amd64_linux_record_signal);
+
+ set_gdbarch_get_siginfo_type (gdbarch, i386_get_siginfo_type);
}
static void
@@ -2055,6 +2057,7 @@ amd64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_dtrace_probe_is_enabled (gdbarch, amd64_dtrace_probe_is_enabled);
set_gdbarch_dtrace_enable_probe (gdbarch, amd64_dtrace_enable_probe);
set_gdbarch_dtrace_disable_probe (gdbarch, amd64_dtrace_disable_probe);
+
}
static void
@@ -2265,6 +2268,8 @@ amd64_x32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ set_gdbarch_get_siginfo_type (gdbarch, i386_get_siginfo_type);
}
diff --git a/gdb/i386-linux-tdep.c b/gdb/i386-linux-tdep.c
index 86fe09e..56dc1e8 100644
--- a/gdb/i386-linux-tdep.c
+++ b/gdb/i386-linux-tdep.c
@@ -223,6 +223,135 @@ i386_linux_rt_sigtramp_start (struct frame_info *this_frame)
return pc;
}
+static struct type *i386_siginfo_t = NULL;
+
+/* This function is suitable for architectures that don't
+ extend/override the standard siginfo structure. */
+
+struct type *
+i386_get_siginfo_type (struct gdbarch *gdbarch)
+{
+ struct type *int_type, *uint_type, *long_type, *void_ptr_type, *short_type;
+ struct type *uid_type, *pid_type;
+ struct type *sigval_type, *clock_type;
+ struct type *siginfo_type, *sifields_type, *sigfault_bnd_fields;
+ struct type *type;
+
+ if (i386_siginfo_t != NULL)
+ return i386_siginfo_t;
+
+
+ int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
+ 0, "int");
+ uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
+ 1, "unsigned int");
+ long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
+ 0, "long");
+ short_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
+ 0, "short");
+ void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
+
+ /* sival_t */
+ sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
+ TYPE_NAME (sigval_type) = xstrdup ("sigval_t");
+ append_composite_type_field (sigval_type, "sival_int", int_type);
+ append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
+
+ /* __pid_t */
+ pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
+ TYPE_LENGTH (int_type), "__pid_t");
+ TYPE_TARGET_TYPE (pid_type) = int_type;
+ TYPE_TARGET_STUB (pid_type) = 1;
+
+ /* __uid_t */
+ uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
+ TYPE_LENGTH (uint_type), "__uid_t");
+ TYPE_TARGET_TYPE (uid_type) = uint_type;
+ TYPE_TARGET_STUB (uid_type) = 1;
+
+ /* __clock_t */
+ clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
+ TYPE_LENGTH (long_type), "__clock_t");
+ TYPE_TARGET_TYPE (clock_type) = long_type;
+ TYPE_TARGET_STUB (clock_type) = 1;
+
+ /* _sifields */
+ sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
+
+ {
+ const int si_max_size = 128;
+ int si_pad_size;
+ int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
+
+ /* _pad */
+ if (gdbarch_ptr_bit (gdbarch) == 64)
+ si_pad_size = (si_max_size / size_of_int) - 4;
+ else
+ si_pad_size = (si_max_size / size_of_int) - 3;
+ append_composite_type_field (sifields_type, "_pad",
+ init_vector_type (int_type, si_pad_size));
+ }
+
+ /* _kill */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_pid", pid_type);
+ append_composite_type_field (type, "si_uid", uid_type);
+ append_composite_type_field (sifields_type, "_kill", type);
+
+ /* _timer */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_tid", int_type);
+ append_composite_type_field (type, "si_overrun", int_type);
+ append_composite_type_field (type, "si_sigval", sigval_type);
+ append_composite_type_field (sifields_type, "_timer", type);
+
+ /* _rt */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_pid", pid_type);
+ append_composite_type_field (type, "si_uid", uid_type);
+ append_composite_type_field (type, "si_sigval", sigval_type);
+ append_composite_type_field (sifields_type, "_rt", type);
+
+ /* _sigchld */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_pid", pid_type);
+ append_composite_type_field (type, "si_uid", uid_type);
+ append_composite_type_field (type, "si_status", int_type);
+ append_composite_type_field (type, "si_utime", clock_type);
+ append_composite_type_field (type, "si_stime", clock_type);
+ append_composite_type_field (sifields_type, "_sigchld", type);
+
+ /* _sigfault */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_addr", void_ptr_type);
+ append_composite_type_field (type, "_addr_lsb", short_type);
+
+ sigfault_bnd_fields = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (sigfault_bnd_fields, "_lower", void_ptr_type);
+ append_composite_type_field (sigfault_bnd_fields, "_upper", void_ptr_type);
+ append_composite_type_field (type, "_addr_bnd", sigfault_bnd_fields);
+ append_composite_type_field (sifields_type, "_sigfault", type);
+
+ /* _sigpoll */
+ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (type, "si_band", long_type);
+ append_composite_type_field (type, "si_fd", int_type);
+ append_composite_type_field (sifields_type, "_sigpoll", type);
+
+ /* struct siginfo */
+ siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
+ append_composite_type_field (siginfo_type, "si_signo", int_type);
+ append_composite_type_field (siginfo_type, "si_errno", int_type);
+ append_composite_type_field (siginfo_type, "si_code", int_type);
+ append_composite_type_field_aligned (siginfo_type,
+ "_sifields", sifields_type,
+ TYPE_LENGTH (long_type));
+
+ i386_siginfo_t = siginfo_type;
+ return siginfo_type;
+}
+
/* Return whether THIS_FRAME corresponds to a GNU/Linux sigtramp
routine. */
@@ -994,6 +1123,8 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_I386);
set_gdbarch_get_syscall_number (gdbarch,
i386_linux_get_syscall_number);
+
+ set_gdbarch_get_siginfo_type (gdbarch, i386_get_siginfo_type);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
diff --git a/gdb/i386-linux-tdep.h b/gdb/i386-linux-tdep.h
index 5ac08d3..0f608fc 100644
--- a/gdb/i386-linux-tdep.h
+++ b/gdb/i386-linux-tdep.h
@@ -37,6 +37,8 @@
/* Get XSAVE extended state xcr0 from core dump. */
extern uint64_t i386_linux_core_read_xcr0 (bfd *abfd);
+extern struct type *i386_get_siginfo_type (struct gdbarch *gdbarch);
+
/* Linux target description. */
extern struct target_desc *tdesc_i386_linux;
extern struct target_desc *tdesc_i386_mmx_linux;