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.

1 files changed, 96 insertions, 0 deletions

diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 5831172bfaa..956734abacb 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -792,6 +792,101 @@ M:void:record_special_symbol:struct objfile *objfile, asymbol *sym:objfile, sym
 # Get architecture-specific system calls information from registers.
 M:LONGEST:get_syscall_number:ptid_t ptid:ptid
 
+# SystemTap related fields and functions.
+
+# Prefix used to mark an integer constant on the architecture's assembly
+# For example, on x86 integer constants are written as:
+#
+#  \$10 ;; integer constant 10
+#
+# in this case, this prefix would be the character \`\$\'.
+v:const char *:stap_integer_prefix:::0:0::0:gdbarch->stap_integer_prefix
+
+# Suffix used to mark an integer constant on the architecture's assembly.
+v:const char *:stap_integer_suffix:::0:0::0:gdbarch->stap_integer_suffix
+
+# Prefix used to mark a register name on the architecture's assembly.
+# For example, on x86 the register name is written as:
+#
+#  \%eax ;; register eax
+#
+# in this case, this prefix would be the character \`\%\'.
+v:const char *:stap_register_prefix:::0:0::0:gdbarch->stap_register_prefix
+
+# Suffix used to mark a register name on the architecture's assembly
+v:const char *:stap_register_suffix:::0:0::0:gdbarch->stap_register_suffix
+
+# Prefix used to mark a register indirection on the architecture's assembly.
+# For example, on x86 the register indirection is written as:
+#
+#  \(\%eax\) ;; indirecting eax
+#
+# in this case, this prefix would be the charater \`\(\'.
+#
+# Please note that we use the indirection prefix also for register
+# displacement, e.g., \`4\(\%eax\)\' on x86.
+v:const char *:stap_register_indirection_prefix:::0:0::0:gdbarch->stap_register_indirection_prefix
+
+# Suffix used to mark a register indirection on the architecture's assembly.
+# For example, on x86 the register indirection is written as:
+#
+#  \(\%eax\) ;; indirecting eax
+#
+# in this case, this prefix would be the charater \`\)\'.
+#
+# Please note that we use the indirection suffix also for register
+# displacement, e.g., \`4\(\%eax\)\' on x86.
+v:const char *:stap_register_indirection_suffix:::0:0::0:gdbarch->stap_register_indirection_suffix
+
+# Prefix used to name a register using GDB's nomenclature.
+#
+# For example, on PPC a register is represented by a number in the assembly
+# language (e.g., \`10\' is the 10th general-purpose register).  However,
+# inside GDB this same register has an \`r\' appended to its name, so the 10th
+# register would be represented as \`r10\' internally.
+v:const char *:stap_gdb_register_prefix:::0:0::0:gdbarch->stap_gdb_register_prefix
+
+# Suffix used to name a register using GDB's nomenclature.
+v:const char *:stap_gdb_register_suffix:::0:0::0:gdbarch->stap_gdb_register_suffix
+
+# Check if S is a single operand.
+#
+# Single operands can be:
+#  \- Literal integers, e.g. \`\$10\' on x86
+#  \- Register access, e.g. \`\%eax\' on x86
+#  \- Register indirection, e.g. \`\(\%eax\)\' on x86
+#  \- Register displacement, e.g. \`4\(\%eax\)\' on x86
+#
+# This function should check for these patterns on the string
+# and return 1 if some were found, or zero otherwise.  Please try to match
+# as much info as you can from the string, i.e., if you have to match
+# something like \`\(\%\', do not match just the \`\(\'.
+M:int:stap_is_single_operand:const char *s:s
+
+# Function used to handle a "special case" in the parser.
+#
+# A "special case" is considered to be an unknown token, i.e., a token
+# that the parser does not know how to parse.  A good example of special
+# case would be ARM's register displacement syntax:
+#
+#  [R0, #4]  ;; displacing R0 by 4
+#
+# Since the parser assumes that a register displacement is of the form:
+#
+#  <number> <indirection_prefix> <register_name> <indirection_suffix>
+#
+# it means that it will not be able to recognize and parse this odd syntax.
+# Therefore, we should add a special case function that will handle this token.
+#
+# This function should generate the proper expression form of the expression
+# using GDB\'s internal expression mechanism (e.g., \`write_exp_elt_opcode\'
+# and so on).  It should also return 1 if the parsing was successful, or zero
+# if the token was not recognized as a special token (in this case, returning
+# zero means that the special parser is deferring the parsing to the generic
+# parser), and should advance the buffer pointer (p->arg).
+M:int:stap_parse_special_token:struct stap_parse_info *p:p
+
+
 # True if the list of shared libraries is one and only for all
 # processes, as opposed to a list of shared libraries per inferior.
 # This usually means that all processes, although may or may not share
@@ -954,6 +1049,7 @@ struct core_regset_section;
 struct syscall;
 struct agent_expr;
 struct axs_value;
+struct stap_parse_info;
 
 /* The architecture associated with the connection to the target.