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author | Sergio Durigan Junior <sergiodj@redhat.com> | 2012-04-27 20:47:57 +0000 |
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committer | Sergio Durigan Junior <sergiodj@redhat.com> | 2012-04-27 20:47:57 +0000 |
commit | 55aa24fb2eb147288fec359a99e960f7136336e8 (patch) | |
tree | d9650d8e5cd7bdbe4f19fb124a2190c8d321db63 /gdb/arm-linux-tdep.c | |
parent | 2755f698e14dabda211bc592a414ee21e0421a2d (diff) | |
download | gdb-55aa24fb2eb147288fec359a99e960f7136336e8.zip gdb-55aa24fb2eb147288fec359a99e960f7136336e8.tar.gz gdb-55aa24fb2eb147288fec359a99e960f7136336e8.tar.bz2 |
2012-04-27 Sergio Durigan Junior <sergiodj@redhat.com>
Tom Tromey <tromey@redhat.com>
Jan Kratochvil <jan.kratochvil@redhat.com>
* Makefile.in (SFILES): Add `probe' and `stap-probe'.
(COMMON_OBS): Likewise.
(HFILES_NO_SRCDIR): Add `probe'.
* NEWS: Mention support for static and SystemTap probes.
* amd64-tdep.c (amd64_init_abi): Initializing proper fields used by
SystemTap probes' arguments parser.
* arm-linux-tdep.c: Including headers needed to perform the parsing
of SystemTap probes' arguments.
(arm_stap_is_single_operand): New function.
(arm_stap_parse_special_token): Likewise.
(arm_linux_init_abi): Initializing proper fields used by SystemTap
probes' arguments parser.
* ax-gdb.c (require_rvalue): Removing static declaration.
(gen_expr): Likewise.
* ax-gdb.h (gen_expr): Declaring function.
(require_rvalue): Likewise.
* breakpoint.c: Include `gdb_regex.h' and `probe.h'.
(bkpt_probe_breakpoint_ops): New variable.
(momentary_breakpoint_from_master): Set the `probe' value.
(add_location_to_breakpoint): Likewise.
(break_command_1): Using proper breakpoint_ops according to the
argument passed by the user in the command line.
(bkpt_probe_insert_location): New function.
(bkpt_probe_remove_location): Likewise.
(bkpt_probe_create_sals_from_address): Likewise.
(bkpt_probe_decode_linespec): Likewise.
(tracepoint_probe_create_sals_from_address): Likewise.
(tracepoint_probe_decode_linespec): Likewise.
(tracepoint_probe_breakpoint_ops): New variable.
(trace_command): Using proper breakpoint_ops according to the
argument passed by the user in the command line.
(initialize_breakpoint_ops): Initializing breakpoint_ops for
static probes on breakpoints and tracepoints.
* breakpoint.h (struct bp_location) <probe>: New field.
* cli-utils.c (skip_spaces_const): New function.
(extract_arg): Likewise.
* cli-utils.h (skip_spaces_const): Likewise.
(extract_arg): Likewise.
* coffread.c (coff_sym_fns): Add `sym_probe_fns' value.
* configure.ac: Append `stap-probe.o' to be generated when ELF
support is present.
* configure: Regenerate.
* dbxread.c (aout_sym_fns): Add `sym_probe_fns' value.
* elfread.c: Include `probe.h' and `arch-utils.h'.
(probe_key): New variable.
(elf_get_probes): New function.
(elf_get_probe_argument_count): Likewise.
(elf_evaluate_probe_argument): Likewise.
(elf_compile_to_ax): Likewise.
(elf_symfile_relocate_probe): Likewise.
(stap_probe_key_free): Likewise.
(elf_probe_fns): New variable.
(elf_sym_fns): Add `sym_probe_fns' value.
(elf_sym_fns_lazy_psyms): Likewise.
(elf_sym_fns_gdb_index): Likewise.
(_initialize_elfread): Initialize objfile cache for static
probes.
* gdb_vecs.h (struct probe): New forward declaration.
(probe_p): New VEC declaration.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* gdbarch.sh (stap_integer_prefix): New variable.
(stap_integer_suffix): Likewise.
(stap_register_prefix): Likewise.
(stap_register_suffix): Likewise.
(stap_register_indirection_prefix): Likewise.
(stap_register_indirection_suffix): Likewise.
(stap_gdb_register_prefix): Likewise.
(stap_gdb_register_suffix): Likewise.
(stap_is_single_operand): New function.
(stap_parse_special_token): Likewise.
(struct stap_parse_info): Forward declaration.
* i386-tdep.c: Including headers needed to perform the parsing
of SystemTap probes' arguments.
(i386_stap_is_single_operand): New function.
(i386_stap_parse_special_token): Likewise.
(i386_elf_init_abi): Initializing proper fields used by SystemTap
probes' arguments parser.
* i386-tdep.h (i386_stap_is_single_operand): New function.
(i386_stap_parse_special_token): Likewise.
* machoread.c (macho_sym_fns): Add `sym_probe_fns' value.
* mipsread.c (ecoff_sym_fns): Likewise.
* objfiles.c (objfile_relocate1): Support relocation for static
probes.
* parse.c (prefixify_expression): Remove static declaration.
(initialize_expout): Likewise.
(reallocate_expout): Likewise.
* parser-defs.h (initialize_expout): Declare function.
(reallocate_expout): Likewise.
(prefixify_expression): Likewise.
* ppc-linux-tdep.c: Including headers needed to perform the parsing
of SystemTap probes' arguments.
(ppc_stap_is_single_operand): New function.
(ppc_stap_parse_special_token): Likewise.
(ppc_linux_init_abi): Initializing proper fields used by SystemTap
probes' arguments parser.
* probe.c: New file, for generic statically defined probe support.
* probe.h: Likewise.
* s390-tdep.c: Including headers needed to perform the parsing of
SystemTap probes' arguments.
(s390_stap_is_single_operand): New function.
(s390_gdbarch_init): Initializing proper fields used by SystemTap
probes' arguments parser.
* somread.c (som_sym_fns): Add `sym_probe_fns' value.
* stap-probe.c: New file, for SystemTap probe support.
* stap-probe.h: Likewise.
* symfile.h: Include `gdb_vecs.h'.
(struct sym_probe_fns): New struct.
(struct sym_fns) <sym_probe_fns>: New field.
* symtab.c (init_sal): Initialize `probe' field.
* symtab.h (struct probe): Forward declaration.
(struct symtab_and_line) <probe>: New field.
* tracepoint.c (start_tracing): Adjust semaphore on breakpoints
locations.
(stop_tracing): Likewise.
* xcoffread.c (xcoff_sym_fns): Add `sym_probe_fns' value.
Diffstat (limited to 'gdb/arm-linux-tdep.c')
-rw-r--r-- | gdb/arm-linux-tdep.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c index 486e6ed..f4eaa5c 100644 --- a/gdb/arm-linux-tdep.c +++ b/gdb/arm-linux-tdep.c @@ -43,6 +43,12 @@ #include "gdbthread.h" #include "symfile.h" +#include "cli/cli-utils.h" +#include "stap-probe.h" +#include "parser-defs.h" +#include "user-regs.h" +#include <ctype.h> + #include "gdb_string.h" /* This is defined in <elf.h> on ARM GNU/Linux systems. */ @@ -1056,6 +1062,122 @@ arm_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, return dsc; } +static int +arm_stap_is_single_operand (struct gdbarch *gdbarch, const char *s) +{ + return (*s == '#' /* Literal number. */ + || *s == '[' /* Register indirection or + displacement. */ + || isalpha (*s)); /* Register value. */ +} + +/* This routine is used to parse a special token in ARM's assembly. + + The special tokens parsed by it are: + + - Register displacement (e.g, [fp, #-8]) + + It returns one if the special token has been parsed successfully, + or zero if the current token is not considered special. */ + +static int +arm_stap_parse_special_token (struct gdbarch *gdbarch, + struct stap_parse_info *p) +{ + if (*p->arg == '[') + { + /* Temporary holder for lookahead. */ + const char *tmp = p->arg; + /* Used to save the register name. */ + const char *start; + char *regname; + int len, offset; + int got_minus = 0; + long displacement; + struct stoken str; + + ++tmp; + start = tmp; + + /* Register name. */ + while (isalnum (*tmp)) + ++tmp; + + if (*tmp != ',') + return 0; + + len = tmp - start; + regname = alloca (len + 2); + + offset = 0; + if (isdigit (*start)) + { + /* If we are dealing with a register whose name begins with a + digit, it means we should prefix the name with the letter + `r', because GDB expects this name pattern. Otherwise (e.g., + we are dealing with the register `fp'), we don't need to + add such a prefix. */ + regname[0] = 'r'; + offset = 1; + } + + strncpy (regname + offset, start, len); + len += offset; + regname[len] = '\0'; + + if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1) + error (_("Invalid register name `%s' on expression `%s'."), + regname, p->saved_arg); + + ++tmp; + tmp = skip_spaces_const (tmp); + if (*tmp++ != '#') + return 0; + + if (*tmp == '-') + { + ++tmp; + got_minus = 1; + } + + displacement = strtol (tmp, (char **) &tmp, 10); + + /* Skipping last `]'. */ + if (*tmp++ != ']') + return 0; + + /* The displacement. */ + write_exp_elt_opcode (OP_LONG); + write_exp_elt_type (builtin_type (gdbarch)->builtin_long); + write_exp_elt_longcst (displacement); + write_exp_elt_opcode (OP_LONG); + if (got_minus) + write_exp_elt_opcode (UNOP_NEG); + + /* The register name. */ + write_exp_elt_opcode (OP_REGISTER); + str.ptr = regname; + str.length = len; + write_exp_string (str); + write_exp_elt_opcode (OP_REGISTER); + + write_exp_elt_opcode (BINOP_ADD); + + /* Casting to the expected type. */ + write_exp_elt_opcode (UNOP_CAST); + write_exp_elt_type (lookup_pointer_type (p->arg_type)); + write_exp_elt_opcode (UNOP_CAST); + + write_exp_elt_opcode (UNOP_IND); + + p->arg = tmp; + } + else + return 0; + + return 1; +} + static void arm_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) @@ -1158,6 +1280,16 @@ arm_linux_init_abi (struct gdbarch_info info, /* Reversible debugging, process record. */ set_gdbarch_process_record (gdbarch, arm_process_record); + /* SystemTap functions. */ + set_gdbarch_stap_integer_prefix (gdbarch, "#"); + set_gdbarch_stap_register_prefix (gdbarch, "r"); + set_gdbarch_stap_register_indirection_prefix (gdbarch, "["); + set_gdbarch_stap_register_indirection_suffix (gdbarch, "]"); + set_gdbarch_stap_gdb_register_prefix (gdbarch, "r"); + set_gdbarch_stap_is_single_operand (gdbarch, arm_stap_is_single_operand); + set_gdbarch_stap_parse_special_token (gdbarch, + arm_stap_parse_special_token); + tdep->syscall_next_pc = arm_linux_syscall_next_pc; /* Syscall record. */ |