diff options
| -rw-r--r-- | gdb/testsuite/gdb.base/catch-syscall.c | 25 | ||||
| -rw-r--r-- | gdb/testsuite/gdb.base/catch-syscall.exp | 445 | ||||
| -rw-r--r-- | gdb/xml-syscall.c | 432 | ||||
| -rw-r--r-- | gdb/xml-syscall.h | 50 |
4 files changed, 952 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.base/catch-syscall.c b/gdb/testsuite/gdb.base/catch-syscall.c new file mode 100644 index 0000000..64850de --- /dev/null +++ b/gdb/testsuite/gdb.base/catch-syscall.c @@ -0,0 +1,25 @@ +/* This file is used to test the 'catch syscall' feature on GDB. + + Please, if you are going to edit this file DO NOT change the syscalls + being called (nor the order of them). If you really must do this, then + take a look at catch-syscall.exp and modify there too. + + Written by Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com> + September, 2008 */ + +#include <unistd.h> +#include <fcntl.h> +#include <sys/stat.h> + +int +main (void) +{ + /* A close() with a wrong argument. We are only + interested in the syscall. */ + close (-1); + + chroot ("."); + + /* The last syscall. Do not change this. */ + _exit (0); +} diff --git a/gdb/testsuite/gdb.base/catch-syscall.exp b/gdb/testsuite/gdb.base/catch-syscall.exp new file mode 100644 index 0000000..6798d04 --- /dev/null +++ b/gdb/testsuite/gdb.base/catch-syscall.exp @@ -0,0 +1,445 @@ +# Copyright 1997, 1999, 2007, 2008 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + + +# This program tests the 'catch syscall' functionality. +# +# It was written by Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com> +# on September/2008. + +if { [is_remote target] || ![isnative] } then { + continue +} + +set prms_id 0 +set bug_id 0 + +global srcfile +set testfile "catch-syscall" +set srcfile ${testfile}.c +set binfile ${objdir}/${subdir}/${testfile} + +# All (but the last) syscalls from the example code +# They are ordered according to the file, so do not change this. +set all_syscalls { "close" "chroot" } +set all_syscalls_numbers { } +# The last syscall (exit()) does not return, so +# we cannot expect the catchpoint to be triggered +# twice. It is a special case. +set last_syscall "exit_group" + +if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { + untested catch-syscall.exp + return -1 +} + +# Until "catch syscall" is implemented on other targets... +if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then { + continue +} + +# This shall be updated whenever 'catch syscall' is implemented +# on some architecture. +#if { ![istarget "i\[34567\]86-*-linux*"] +if { ![istarget "x86_64-*-linux*"] && ![istarget "i\[34567\]86-*-linux*"] + && ![istarget "powerpc-*-linux*"] && ![istarget "powerpc64-*-linux*"] } { + continue +} + +# Internal procedure used to check if, after issuing a 'catch syscall' +# command (without arguments), the 'info breakpoints' command displays +# that '"any syscall"' is to be caught. +proc check_info_bp_any_syscall {} { + global gdb_prompt + + # Verifying that the catchpoint appears in the 'info breakpoints' + # command, but with "<any syscall>". + set thistest "catch syscall appears in 'info breakpoints'" + gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall \"<any syscall>\".*" $thistest +} + +# Internal procedure used to check if, after issuing a 'catch syscall X' +# command (with arguments), the 'info breakpoints' command displays +# that the syscall 'X' is to be caught. +proc check_info_bp_specific_syscall { syscall } { + global gdb_prompt + + set thistest "syscall(s) $syscall appears in 'info breakpoints'" + gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall(\[(\]s\[)\])? (.)?${syscall}(.)?.*" $thistest +} + +# Internal procedure used to check if, after issuing a 'catch syscall X' +# command (with many arguments), the 'info breakpoints' command displays +# that the syscalls 'X' are to be caught. +proc check_info_bp_many_syscalls { syscalls } { + global gdb_prompt + set filter_str "" + + foreach name $syscalls { + set filter_str "${filter_str}${name}, " + } + + set filter_str [ string trimright $filter_str ", " ] + + set thistest "syscalls $filter_str appears in 'info breakpoints'" + gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscalls (.)?${filter_str}(.)?.*" $thistest +} + +# This procedure checks if there was a call to a syscall. +proc check_call_to_syscall { syscall } { + global gdb_prompt + + set thistest "program has called $syscall" + gdb_test "continue" "Catchpoint .*(call to syscall .?${syscall}.?).*" $thistest +} + +# This procedure checks if the syscall returned. +proc check_return_from_syscall { syscall } { + global gdb_prompt + + set thistest "syscall $syscall has returned" + gdb_test "continue" "Catchpoint .*(returned from syscall (.)?${syscall}(.)?).*" $thistest +} + +# Internal procedure that performs two 'continue' commands and checks if +# a syscall call AND return occur. +proc check_continue { syscall } { + global gdb_prompt + + # Testing if the 'continue' stops at the + # specified syscall_name. If it does, then it should + # first print that the infeior has called the syscall, + # and after print that the syscall has returned. + + # Testing if the inferiorr has called the syscall. + check_call_to_syscall $syscall + # And now, that the syscall has returned. + check_return_from_syscall $syscall +} + +# Inserts a syscall catchpoint with an argument. +proc insert_catch_syscall_with_arg { syscall } { + global gdb_prompt + + # Trying to set the catchpoint + set thistest "catch syscall with arguments ($syscall)" + gdb_test "catch syscall $syscall" "Catchpoint .*(syscall (.)?${syscall}(.)?( \[\[0-9\]+\])?).*" $thistest + + check_info_bp_specific_syscall $syscall +} + +# Inserts a syscall catchpoint with many arguments. +proc insert_catch_syscall_with_many_args { syscalls numbers } { + global gdb_prompt + set catch [ join $syscalls " " ] + set filter_str "" + + foreach name $syscalls number $numbers { + set filter_str "${filter_str}'${name}' \[${number}\] " + } + + set filter_str [ string trimright $filter_str " " ] + + # Trying to set the catchpoint + set thistest "catch syscall with arguments ($filter_str)" + gdb_test "catch syscall $catch" "Catchpoint .*(syscalls (.)?${filter_str}(.)?).*" $thistest + + check_info_bp_many_syscalls $syscalls +} + +proc check_for_program_end {} { + global gdb_prompt + + # Deleting the catchpoints + delete_breakpoints + + set thistest "successful program end" + gdb_test "continue" "Program exited normally.*" $thistest + +} + +proc test_catch_syscall_without_args {} { + global gdb_prompt all_syscalls last_syscall + + # Trying to set the syscall + set thistest "setting catch syscall without arguments" + gdb_test "catch syscall" "Catchpoint .*(syscall).*" $thistest + + check_info_bp_any_syscall + + # We have to check every syscall + foreach name $all_syscalls { + check_continue $name + } + + # At last but not least, we check if the inferior + # has called the last (exit) syscall. + check_call_to_syscall $last_syscall + + # Now let's see if the inferior correctly finishes. + check_for_program_end +} + +proc test_catch_syscall_with_args {} { + global gdb_prompt + set syscall_name "close" + + insert_catch_syscall_with_arg $syscall_name + + # Can we continue until we catch the syscall? + check_continue $syscall_name + + # Now let's see if the inferior correctly finishes. + check_for_program_end +} + +proc test_catch_syscall_with_many_args {} { + global gdb_prompt all_syscalls all_syscalls_numbers + + insert_catch_syscall_with_many_args $all_syscalls $all_syscalls_numbers + + # Can we continue until we catch the syscalls? + foreach name $all_syscalls { + check_continue $name + } + + # Now let's see if the inferior correctly finishes. + check_for_program_end +} + +proc test_catch_syscall_with_wrong_args {} { + global gdb_prompt + # mlock is not called from the source + set syscall_name "mlock" + + insert_catch_syscall_with_arg $syscall_name + + # Now, we must verify if the program stops with a continue. + # If it doesn't, everything is right (since we don't have + # a syscall named "mlock" in it). Otherwise, this is a failure. + set thistest "catch syscall with unused syscall ($syscall_name)" + gdb_test "continue" "Program exited normally.*" $thistest +} + +proc test_catch_syscall_restarting_inferior {} { + global gdb_prompt + set syscall_name "chroot" + + insert_catch_syscall_with_arg $syscall_name + + # Let's first reach the call of the syscall. + check_call_to_syscall $syscall_name + + # Now, restart the program + rerun_to_main + + # And check for call/return + check_continue $syscall_name + + # Can we finish? + check_for_program_end +} + +proc do_syscall_tests {} { + global gdb_prompt srcdir + + # First, we need to set GDB datadir. + send_gdb "set data-directory $srcdir/..\n" + gdb_expect 10 { + -re "$gdb_prompt $" { + verbose "Setting GDB datadir to $srcdir/..." 2 + } + timeout { + error "Couldn't set GDB datadir." + } + } + + # Verify that the 'catch syscall' help is available + set thistest "help catch syscall" + gdb_test "help catch syscall" "Catch system calls.*" $thistest + + # Try to set a catchpoint to a nonsense syscall + set thistest "catch syscall to a nonsense syscall is prohibited" + gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .*" $thistest + + # Testing the 'catch syscall' command without arguments. + # This test should catch any syscalls. + if [runto_main] then { test_catch_syscall_without_args } + + # Testing the 'catch syscall' command with arguments. + # This test should only catch the specified syscall. + if [runto_main] then { test_catch_syscall_with_args } + + # Testing the 'catch syscall' command with many arguments. + # This test should catch $all_syscalls. + if [runto_main] then { test_catch_syscall_with_many_args } + + # Testing the 'catch syscall' command with WRONG arguments. + # This test should not trigger any catchpoints. + if [runto_main] then { test_catch_syscall_with_wrong_args } + + # Testing the 'catch' syscall command during a restart of + # the inferior. + if [runto_main] then { test_catch_syscall_restarting_inferior } +} + +proc test_catch_syscall_fail_noxml {} { + global gdb_prompt + + # Sanitizing. + delete_breakpoints + + # Testing to see if we receive a warning when calling "catch syscall" + # without XML support. + set thistest "Catch syscall displays a warning when there is no XML support" + gdb_test "catch syscall" "warning: Could not open .*warning: Could not load the syscall XML file .*GDB will not be able to display syscall names.*Catchpoint .*(syscall).*" $thistest + + # Since the catchpoint was set, we must check if it's present at + # "info breakpoints" + check_info_bp_any_syscall + + # Sanitizing. + delete_breakpoints +} + +proc test_catch_syscall_without_args_noxml {} { + # We will need the syscall names even not using it + # because we need to know know many syscalls are in + # the example file. + global gdb_prompt all_syscalls last_syscall + + delete_breakpoints + + set thistest "Catch syscall without arguments and without XML support" + gdb_test "catch syscall" "Catchpoint .*(syscall).*" + + # Now, we should be able to set a catchpoint, + # and GDB shall not display the warning anymore. + foreach name $all_syscalls { + # Unfortunately, we don't know the syscall number + # that will be caught because this information is + # arch-dependent. Thus, we try to catch anything + # similar to a number. + check_continue "\[0-9\]*" + } + + # At last but not least, we check if the inferior + # has called the last (exit) syscall. + check_call_to_syscall "\[0-9\]*" + + delete_breakpoints +} + +proc test_catch_syscall_with_args_noxml {} { + global gdb_prompt + + # The number of the "close" syscall. This is our + # option for a "long-estabilished" syscall in all + # Linux architectures, but unfortunately x86_64 and + # a few other platforms don't "follow the convention". + # Because of this, we need this ugly check :-(. + set close_number "" + if { [istarget "x86_64-*-linux*"] } { + set close_number "3" + } else { + set close_number "6" + } + + delete_breakpoints + + insert_catch_syscall_with_arg $close_number + + check_continue $close_number + + delete_breakpoints +} + +proc test_catch_syscall_with_wrong_args_noxml {} { + global gdb_prompt + + delete_breakpoints + + # Even without XML support, GDB should not accept unknown + # syscall names for the catchpoint. + set thistest "Catch a nonsense syscall without XML support" + gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .nonsense_syscall.*" $thistest + + delete_breakpoints +} + +proc do_syscall_tests_without_xml {} { + global gdb_prompt srcdir + + # In this case, we don't need to set GDB's datadir because + # we want GDB to display only numbers, not names. So, let's + # begin with the tests. + + # The first test is to see if GDB displays a warning when we + # try to catch syscalls without the XML support. + test_catch_syscall_fail_noxml + + # Now, let's test if we can catch syscalls without XML support. + # We should succeed, but GDB is not supposed to print syscall names. + if [runto_main] then { test_catch_syscall_without_args_noxml } + + # The only valid argument "catch syscall" should accept is the + # syscall number, and not the name (since it can't translate a + # name to a number). + # + # It's worth mentioning that we only try to catch the syscall + # close(). This is because the syscall number is an arch-dependent + # information, so we can't assume that we know every syscall number + # in this system. Therefore, we have decided to use a "long-estabilished" + # system call, and close() just sounded the right choice :-). + if [runto_main] then { test_catch_syscall_with_args_noxml } + + # Now, we'll try to provide a syscall name (valid or not) to the command, + # and expect it to fail. + if [runto_main] then { test_catch_syscall_with_wrong_args_noxml } +} + +# This procedure fills the vector "all_syscalls_numbers" with the proper +# numbers for the used syscalls according to the architecture. +proc fill_all_syscalls_numbers {} { + global all_syscalls_numbers + + # For Linux on x86, PPC and PPC64, the numbers for the syscalls "close" and + # "chroot" are the same. + if { ![istarget "i\[34567\]86-*-linux*"] + || ![istarget "powerpc-*-linux*"] || ![istarget "powerpc64-*-linux*"] } { + set all_syscalls_numbers { "6" "61" } + } +} + +# Start with a fresh gdb + +gdb_exit +gdb_start +gdb_reinitialize_dir $srcdir/$subdir +gdb_load ${binfile} + +# Execute the tests, using XML support +do_syscall_tests + +# Restart gdb + +gdb_exit +gdb_start +gdb_reinitialize_dir $srcdir/$subdir +gdb_load ${binfile} + +# Execute the tests, without XML support. In this case, GDB will +# only display syscall numbers, and not syscall names. +do_syscall_tests_without_xml diff --git a/gdb/xml-syscall.c b/gdb/xml-syscall.c new file mode 100644 index 0000000..15bfe6f --- /dev/null +++ b/gdb/xml-syscall.c @@ -0,0 +1,432 @@ +/* Functions that provide the mechanism to parse a syscall XML file + and get its values. + + Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, + 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008 + Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include "defs.h" +#include "gdbtypes.h" +#include "xml-support.h" +#include "xml-syscall.h" + +/* For the struct syscall definition. */ +#include "target.h" + +#include "filenames.h" + +#include "gdb_assert.h" + +#ifndef HAVE_LIBEXPAT + +/* Dummy functions to indicate that there's no support for fetching + syscalls information. */ + +static void +syscall_warn_user (void) +{ + static int have_warned = 0; + if (!have_warned) + { + have_warned = 1; + warning (_("Can not parse XML syscalls information; XML support was " + "disabled at compile time.")); + } +} + +void +set_xml_syscall_file_name (const char *name) +{ + syscall_warn_user (); +} + +void +get_syscall_by_number (int syscall_number, + struct syscall *s) +{ + syscall_warn_user (); + s->number = syscall_number; + s->name = NULL; +} + +void +get_syscall_by_name (const char *syscall_name, + struct syscall *s) +{ + syscall_warn_user (); + s->number = UNKNOWN_SYSCALL; + s->name = syscall_name; +} + +const char ** +get_syscall_names (void) +{ + syscall_warn_user (); + return NULL; +} + + +#else /* ! HAVE_LIBEXPAT */ + +/* Structure which describes a syscall. */ +typedef struct syscall_desc +{ + /* The syscall number. */ + + int number; + + /* The syscall name. */ + + char *name; +} *syscall_desc_p; +DEF_VEC_P(syscall_desc_p); + +/* Structure that represents syscalls information. */ +struct syscalls_info +{ + /* The syscalls. */ + + VEC(syscall_desc_p) *syscalls; +}; + +/* Callback data for syscall information parsing. */ +struct syscall_parsing_data +{ + /* The syscalls_info we are building. */ + + struct syscalls_info *sysinfo; +}; + +/* Structure used to store information about the available syscalls in + the system. */ +static const struct syscalls_info *_sysinfo = NULL; + +/* A flag to tell if we already initialized the structure above. */ +static int have_initialized_sysinfo = 0; + +/* The filename of the syscall's XML. */ +static const char *xml_syscall_file = NULL; + +static struct syscalls_info * +allocate_syscalls_info (void) +{ + return XZALLOC (struct syscalls_info); +} + +static void +sysinfo_free_syscalls_desc (struct syscall_desc *sd) +{ + xfree (sd->name); +} + +static void +free_syscalls_info (void *arg) +{ + struct syscalls_info *sysinfo = arg; + struct syscall_desc *sysdesc; + int i; + + for (i = 0; + VEC_iterate (syscall_desc_p, sysinfo->syscalls, i, sysdesc); + i++) + sysinfo_free_syscalls_desc (sysdesc); + VEC_free (syscall_desc_p, sysinfo->syscalls); + + xfree (sysinfo); +} + +struct cleanup * +make_cleanup_free_syscalls_info (struct syscalls_info *sysinfo) +{ + return make_cleanup (free_syscalls_info, sysinfo); +} + +static void +syscall_create_syscall_desc (struct syscalls_info *sysinfo, + const char *name, int number) +{ + struct syscall_desc *sysdesc = XZALLOC (struct syscall_desc); + + sysdesc->name = xstrdup (name); + sysdesc->number = number; + + VEC_safe_push (syscall_desc_p, sysinfo->syscalls, sysdesc); +} + +/* Handle the start of a <syscalls_info> element. */ +static void +syscall_start_syscalls_info (struct gdb_xml_parser *parser, + const struct gdb_xml_element *element, + void *user_data, + VEC(gdb_xml_value_s) *attributes) +{ + struct syscall_parsing_data *data = user_data; + struct syscalls_info *sysinfo = data->sysinfo; +} + +/* Handle the start of a <syscall> element. */ +static void +syscall_start_syscall (struct gdb_xml_parser *parser, + const struct gdb_xml_element *element, + void *user_data, VEC(gdb_xml_value_s) *attributes) +{ + struct syscall_parsing_data *data = user_data; + struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes); + int len, i; + /* syscall info. */ + char *name = NULL; + int number = 0; + + len = VEC_length (gdb_xml_value_s, attributes); + + for (i = 0; i < len; i++) + { + if (strcmp (attrs[i].name, "name") == 0) + name = attrs[i].value; + else if (strcmp (attrs[i].name, "number") == 0) + number = * (ULONGEST *) attrs[i].value; + else + internal_error (__FILE__, __LINE__, + _("Unknown attribute name '%s'."), attrs[i].name); + } + + syscall_create_syscall_desc (data->sysinfo, name, number); +} + + +/* The elements and attributes of an XML syscall document. */ +static const struct gdb_xml_attribute syscall_attr[] = { + { "number", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, + { "name", GDB_XML_AF_NONE, NULL, NULL }, + { NULL, GDB_XML_AF_NONE, NULL, NULL } +}; + +static const struct gdb_xml_element syscalls_info_children[] = { + { "syscall", syscall_attr, NULL, + GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE, + syscall_start_syscall, NULL }, + { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } +}; + +static const struct gdb_xml_element syselements[] = { + { "syscalls_info", NULL, syscalls_info_children, + GDB_XML_EF_NONE, syscall_start_syscalls_info, NULL }, + { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } +}; + +static struct syscalls_info * +syscall_parse_xml (const char *document, xml_fetch_another fetcher, + void *fetcher_baton) +{ + struct cleanup *result_cleanup; + struct gdb_xml_parser *parser; + struct syscall_parsing_data data; + char *expanded_text; + int i; + + parser = gdb_xml_create_parser_and_cleanup (_("syscalls info"), + syselements, &data); + + memset (&data, 0, sizeof (struct syscall_parsing_data)); + data.sysinfo = allocate_syscalls_info (); + result_cleanup = make_cleanup_free_syscalls_info (data.sysinfo); + + if (gdb_xml_parse (parser, document) == 0) + { + /* Parsed successfully. */ + discard_cleanups (result_cleanup); + return data.sysinfo; + } + else + { + warning (_("Could not load XML syscalls info; ignoring")); + do_cleanups (result_cleanup); + return NULL; + } +} + +/* Function responsible for initializing the information + about the syscalls. It reads the XML file and fills the + struct syscalls_info with the values. + + Returns the struct syscalls_info if the file is valid, NULL otherwise. */ +static const struct syscalls_info * +xml_init_syscalls_info (const char *filename) +{ + char *full_file; + char *dirname; + struct syscalls_info *sysinfo; + struct cleanup *back_to; + + full_file = xml_fetch_content_from_file (filename, gdb_datadir); + if (full_file == NULL) + { + warning (_("Could not open \"%s\""), filename); + return NULL; + } + + back_to = make_cleanup (xfree, full_file); + + dirname = ldirname (filename); + if (dirname != NULL) + make_cleanup (xfree, dirname); + + sysinfo = syscall_parse_xml (full_file, xml_fetch_content_from_file, dirname); + do_cleanups (back_to); + + return sysinfo; +} + +/* Initializes the syscalls_info structure according to the + architecture. */ +static void +init_sysinfo (void) +{ + /* Did we already try to initialize the structure? */ + if (have_initialized_sysinfo) + return; +/* if (xml_syscall_file == NULL) + internal_error (__FILE__, __LINE__, + _("This architecture has not set the XML syscall file " + "name. This is a bug and should not happen; please " + "report it.")); */ + + _sysinfo = xml_init_syscalls_info (xml_syscall_file); + + have_initialized_sysinfo = 1; + + if (_sysinfo == NULL) + { + if (xml_syscall_file) + /* The initialization failed. Let's show a warning + message to the user (just this time) and leave. */ + warning (_("Could not load the syscall XML file `%s'.\n\ +GDB will not be able to display syscall names."), xml_syscall_file); + else + /* There's no file to open. Let's warn the user. */ + warning (_("There is no XML file to open.\n\ +GDB will not be able to display syscall names.")); + } +} + +static int +xml_get_syscall_number (const struct syscalls_info *sysinfo, + const char *syscall_name) +{ + struct syscall_desc *sysdesc; + int i; + + if (sysinfo == NULL + || syscall_name == NULL) + return UNKNOWN_SYSCALL; + + for (i = 0; + VEC_iterate(syscall_desc_p, sysinfo->syscalls, i, sysdesc); + i++) + if (strcmp (sysdesc->name, syscall_name) == 0) + return sysdesc->number; + + return UNKNOWN_SYSCALL; +} + +static const char * +xml_get_syscall_name (const struct syscalls_info *sysinfo, + int syscall_number) +{ + struct syscall_desc *sysdesc; + int i; + + if (sysinfo == NULL + || syscall_number < 0) + return NULL; + + for (i = 0; + VEC_iterate(syscall_desc_p, sysinfo->syscalls, i, sysdesc); + i++) + if (sysdesc->number == syscall_number) + return sysdesc->name; + + return NULL; +} + +static int +xml_number_of_syscalls (const struct syscalls_info *sysinfo) +{ + return (sysinfo == NULL ? 0 : VEC_length (syscall_desc_p, + sysinfo->syscalls)); +} + +static const char ** +xml_list_of_syscalls (const struct syscalls_info *sysinfo) +{ + struct syscall_desc *sysdesc; + const char **names = NULL; + int nsyscalls; + int i; + + if (sysinfo == NULL) + return NULL; + + nsyscalls = VEC_length (syscall_desc_p, sysinfo->syscalls); + names = xmalloc ((nsyscalls + 1) * sizeof (char *)); + + for (i = 0; + VEC_iterate (syscall_desc_p, sysinfo->syscalls, i, sysdesc); + i++) + names[i] = sysdesc->name; + + names[i] = NULL; + + return names; +} + +void +set_xml_syscall_file_name (const char *name) +{ + xml_syscall_file = name; +} + +void +get_syscall_by_number (int syscall_number, + struct syscall *s) +{ + init_sysinfo (); + + s->number = syscall_number; + s->name = xml_get_syscall_name (_sysinfo, syscall_number); +} + +void +get_syscall_by_name (const char *syscall_name, + struct syscall *s) +{ + init_sysinfo (); + + s->number = xml_get_syscall_number (_sysinfo, syscall_name); + s->name = syscall_name; +} + +const char ** +get_syscall_names (void) +{ + init_sysinfo (); + + return xml_list_of_syscalls (_sysinfo); +} + +#endif /* ! HAVE_LIBEXPAT */ diff --git a/gdb/xml-syscall.h b/gdb/xml-syscall.h new file mode 100644 index 0000000..00d3a54 --- /dev/null +++ b/gdb/xml-syscall.h @@ -0,0 +1,50 @@ +/* Functions that provide the mechanism to parse a syscall XML file + and get its values. + + Copyright (C) 2009 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#ifndef XML_SYSCALL_H +#define XML_SYSCALL_H 1 + +/* Function used to set the name of the file which contains + information about the system calls present in the current + architecture. + + This function *should* be called before anything else, otherwise + GDB won't be able to find the correct XML file to open and get + the syscalls definitions. */ + +void set_xml_syscall_file_name (const char *name); + +/* Function that retrieves the syscall name corresponding to the given + number. It puts the requested information inside 'struct syscall'. */ + +void get_syscall_by_number (int syscall_number, struct syscall *s); + +/* Function that retrieves the syscall number corresponding to the given + name. It puts the requested information inside 'struct syscall'. */ + +void get_syscall_by_name (const char *syscall_name, struct syscall *s); + +/* Function used to retrieve the list of syscalls in the system. This list + is returned as an array of strings. Returns the list of syscalls in the + system, or NULL otherwise. */ + +const char **get_syscall_names (void); + +#endif /* XML_SYSCALL_H */ |