"count" is the number of bytes to be written, rounded up to the
nearest multiple of sizeof (PTRACE_XFER_TYPE) and allowing for not
being an aligned address. The function later uses
The problem is that this function can be called to write zero bytes on
an aligned address, for example when receiving an X packet of length 0
(used to test if 8-bit write is supported). Under these circumstances,
count can be zero.
Since in this case, buffer[0] may never have been allocated, the stack
is corrupted and gdbserver may crash.
SOLUTION:
Writing zero bytes should always succeed. The patch below returns
successfully early if the length is zero, so avoiding the stack
corruption.
Verified on the ARC GDB 7.5.1 port.
2013-03-07 Jeremy Bennett <jeremy.bennett@embecosm.com>
PR server/15236
* linux-low.c (linux_write_memory): Return early success if LEN is
zero.
Alan Modra [Wed, 6 Mar 2013 13:40:51 +0000 (13:40 +0000)]
* strings.c (get_char): Dispense with buf[]. Instead shift
chars into big-endian value and byte-swap later if
little-endian. Don't EOF check value read from object.
Pedro Alves [Wed, 6 Mar 2013 12:13:41 +0000 (12:13 +0000)]
tstatus.exp: use UNSUPPORTED for optional features that are not supported
The current tstatus.exp tests shows PASSes if either the target
support or not the optional tstatus bits:
PASS: gdb.trace/tstatus.exp: tstatus does not report trace stop reason
PASS: gdb.trace/tstatus.exp: tstatus reports trace stop reason
The former (and any other similar case) should be UNSUPPORTED rather
than PASS. That'd make it much easier to spot actually problems with
the test (e.g., the one Yao's previous patch addressed), along with
regressions and progressions.
The "not supported" paths in tstatus.exp explicitly check for output
you'd get if the feature wasn't supported, so real unexpected failures
will still be caught as FAILs.
So now e.g., where we wanted to check if tstatus reports the trace
stop reason, and if the target does support it, we get
PASS: tstatus reports trace stop reason
if the target actually reports what we'd expect if the trace stop
reason isn't supported, we get:
UNSUPPORTED: tstatus reports trace stop reason
and if the target reports something else unexpected, we get:
FAIL: tstatus reports trace stop reason
That has the added bonus that the test string is always the same and
only the test results change (PASS/FAIL/UNSUPPORTED), which makes it
easier for testers see regressions, compared to the previous:
-PASS: gdb.trace/tstatus.exp: tstatus reports trace stop reason
+PASS: gdb.trace/tstatus.exp: tstatus does not report trace stop reason
which clearly easily goes by unnoticed, as evidenced by the existing
problem Yao's previous patch addressed.
Tested on x86_64 Fedora 17.
gdb/testsuite/
2013-03-06 Pedro Alves <palves@redhat.com>
* gdb.trace/tstatus.exp (run_trace_experiment): When the target
doesn't support the tested optional feature, call "unsupported"
with the same test message as the "pass" case, instead of calling
"pass" with a different message. Use the same text for the "fail"
cases too.
Yao Qi [Wed, 6 Mar 2013 01:03:40 +0000 (01:03 +0000)]
gdb/testsuite/
* gdb.trace/tstatus.exp: Remove the invocation of
gdb_load_shlibs, gdb_compile, clean_restart and runto_main.
(test_tracepoints): Don't set fast tracepoint.
(top level): Don't check agent library is loaded or not.
Yufeng Zhang [Tue, 5 Mar 2013 16:31:44 +0000 (16:31 +0000)]
Add to the AArch64 GAS the missing support for hexadecimal-format
floating-point literal in the FMOV instruction.
gas/
* config/tc-aarch64.c (aarch64_imm_float_p): Rename 'e' to 'pattern';
add comment.
(aarch64_double_precision_fmovable): New function.
(parse_aarch64_imm_float): Add parameter 'dp_p'; call the new
function; handle hexadecimal representation of IEEE754 encoding.
(parse_operands): Update the call to parse_aarch64_imm_float.
Yao Qi [Tue, 5 Mar 2013 14:23:23 +0000 (14:23 +0000)]
gdb/
* cli/cli-decode.c (add_setshow_zuinteger_unlimited_cmd): Change
parameter VAR's type from "unsigned int" to "int".
* command.h (var_zuinteger_unlimited): Update its comments.
(add_setshow_zuinteger_unlimited_cmd): Update the declaration.
* configure.host: Add x86_64-*-cygwin* as valid host.
* configure.tgt: Add x86_64-*-cygwin* as valid target.
* emultempl/pep.em: Handle different requirements for Cygwin in terms
of start addresses for executables and DLLs, based on memory model in
http://cygwin.com/ml/cygwin-developers/2013-02/msg00027.html
Alan Modra [Tue, 5 Mar 2013 02:55:27 +0000 (02:55 +0000)]
PR ld/15222
ld/
* ldlang.c (lang_size_sections_1): When given an lma_region align
LMA as per VMA only if lma_region is the same as region.
ld/testsuite/
* ld-scripts/rgn-at6.s, * ld-scripts/rgn-at6.t, * ld-scripts/rgn-at6.d,
* ld-scripts/rgn-at7.t, * ld-scripts/rgn-at7.d: New tests.
Jan Kratochvil [Mon, 4 Mar 2013 19:30:28 +0000 (19:30 +0000)]
gdb/
* linespec.c (struct linespec_canonical_name): New.
(struct linespec_state): Change canonical_names type to it.
(add_sal_to_sals): Change variable canonical_name to canonical. Change
xrealloc element size. Initialize the different CANONICAL fields.
(canonical_to_fullform): New.
(filter_results): Use it. Add variables canonical, fullform and
cleanup.
(struct decode_line_2_item, decode_line_2_compare_items): New.
(decode_line_2): Remove variables iter and item_names, add variables
items and items_count. Modify the code for these new variables.
gdb/testsuite/
* gdb.linespec/base/one/thefile.cc (twodup): New.
(m): Call it.
* gdb.linespec/base/two/thefile.cc (dupname): New.
(n): Call it.
* gdb.linespec/break-ask.exp: New file.
* gdb.linespec/lspec.cc (body_elsewhere): New comment marker.
Alan Modra [Mon, 4 Mar 2013 12:12:11 +0000 (12:12 +0000)]
* elf32-ppc.c (ppc_elf_relocate_section <R_PPC_PLTREL24>): Adjust
non-zero addends when relocatable, rather than addends >= 32768.
Always zero "addend" before applying relocation.
Cary Coutant [Fri, 1 Mar 2013 23:05:27 +0000 (23:05 +0000)]
Add dwp support for v2 DWARF package file format.
gold/
* dwarf_reader.cc (Dwarf_info_reader::visit_type_unit): Add
tu_length parameter. Adjust all callers.
* dwarf_reader.h (Dwarf_info_reader::visit_type_unit): Likewise.
* dwp.cc: Include dwarf.h.
(Section_bounds): New struct type.
(Unit_set): New struct type.
(Dwo_file::Dwo_file): Initialize new data member.
(Dwo_file::read_compunit_index, Dwo_file::read_typeunit_index):
Combine and rename to...
(Dwo_file::read_unit_index): ...this.
(Dwo_file::sized_read_compunit_index)
(Dwo_file::sized_read_typeunit_index): Combine and rename to...
(Dwo_file::sized_read_unit_index): ...this.
(Dwo_file::copy_section): Remove section_name, is_str_offsets
parameters; add section_id parameter.
(Dwo_file::add_cu_set, Dwo_file::add_tu_set): Combine and rename to...
(Dwo_file::add_unit_set): ...this.
(Dwo_file::shndx_map_): Remove.
(Dwo_file::sect_offsets_): New data member.
(Dwp_output_file::Dwp_output_file): Initialize new data members.
(Dwp_output_file::add_section): Rename to...
(Dwp_output_file::add_contribution): ...this.
(Dwp_output_file::add_cu_set): Combine parameters into a struct.
(Dwp_output_file::add_tu_set): Likewise.
(Dwp_output_file::Contribution): New type.
(Dwp_output_file::Section::contributions): New data member.
(Dwp_output_file::Cu_or_tu_set): Remove.
(Dwp_output_file::Section::Section): New ctor.
(Dwp_output_file::Dwp_index::Shndx_pool): Remove.
(Dwp_output_file::Dwp_index::Section_table): New type.
(Dwp_output_file::Dwp_index::Dwp_index): Initialize new data members.
(Dwp_output_file::Dwp_index::enter_set): Change type of "set"
parameter.
(Dwp_output_file::Dwp_index::shndx_pool): Remove.
(Dwp_output_file::Dwp_index::shndx_pool_end): Remove.
(Dwp_output_file::Dwp_index::section_table): New member function.
(Dwp_output_file::Dwp_index::section_table_end): New member function.
(Dwp_output_file::Dwp_index::shndx_pool_size): Remove.
(Dwp_output_file::Dwp_index::section_table_rows): New member function.
(Dwp_output_file::Dwp_index::section_table_cols): New member function.
(Dwp_output_file::Dwp_index::shndx_pool_): Remove.
(Dwp_output_file::Dwp_index::section_table_): New data member.
(Dwp_output_file::Dwp_index::section_mask_): New data member.
(Dwp_output_file::add_output_section): New member function.
(Dwp_output_file::write_new_section): New member function.
(Dwp_output_file::write_contributions): New member function.
(Dwp_output_file::section_id_map_): New data member.
(class Dwo_id_info_reader): Remove.
(class Unit_reader): New class.
(get_dwarf_section_name): New function.
(Dwo_file::read_executable): Adjust initializations of class data.
(Dwo_file::read): Add support for v2 package file format.
(Dwo_file::read_unit_index): Likewise.
(Dwo_file::sized_read_unit_index): Likewise.
(Dwo_file::copy_section): Likewise.
(Dwo_file::add_unit_set): Likewise.
(Dwp_output_file::add_output_section): Likewise.
(Dwp_output_file::add_contribution): Likewise.
(Dwp_output_file::Dwp_index::find_or_add): Use row index to check
for empty slot.
(Dwp_output_file::Dwp_index::enter_set): Add support for v2 package
file format.
(Dwp_output_file::Dwp_index::grow): Use row index to check for empty
slot.
(Dwp_output_file::initialize): Remove unused function.
(Dwp_output_file::finalize): Add support for v2 package file format.
(Dwp_output_file::write_index): Likewise.
* gdb-index.cc (Gdb_index_info_reader::visit_type_unit): Adjust
function prototype.
Cary Coutant [Fri, 1 Mar 2013 22:53:02 +0000 (22:53 +0000)]
gold/
* dwarf_reader.cc (Dwarf_info_reader::check_buffer): Move
function into class definition in header file.
(Dwarf_info_reader::warn_corrupt_debug_section): New function.
* dwarf_reader.h (Dwarf_info_reader::warn_corrupt_debug_section):
New function.
(Dwarf_info_reader::check_buffer): Move here from .cc file.
Cary Coutant [Fri, 1 Mar 2013 19:24:07 +0000 (19:24 +0000)]
binutils/
* dwarf.c (cu_tu_indexes_read, shndx_pool, shndx_pool_size)
(shndx_pool_used): Move to top of file.
(struct cu_tu_set): New type.
(cu_count, tu_count, cu_sets, tu_sets): New file scope variables.
(fetch_indexed_string): Add "this_set" parameter. Update all callers.
(find_cu_tu_set_v2): New function.
(read_and_display_attr_value): Add "this_set" parameter.
(read_and_display_attr): Likewise.
(process_debug_info): Track base offsets for DWARF package files.
(load_debug_info): Call load_cu_tu_indexes.
(get_DW_SECT_short_name): New function.
(process_cu_tu_index): Add support for version 2 DWARF package files.
Pedro Alves [Fri, 1 Mar 2013 15:38:27 +0000 (15:38 +0000)]
Use gdb_byte for bytes from the program being debugged.
gdb_byte should be used for bytes from the program being debugged. We
have many places using char or unsigned char instead all over the
existing ports, and more ends up added over time due to copy/paste as
new code is based on old code.
I've greped the tree for "char buf[", and fixed all I found.
Tested by building with --enable-targets=all.
2013-03-01 Pedro Alves <palves@redhat.com>
Use gdb_byte for bytes from the program being debugged.
* arm-tdep.c (arm_store_return_value, arm_get_longjmp_target):
Change type of local 'buf' to gdb_byte.
* avr-tdep.c (avr_frame_prev_register, avr_push_dummy_call): Likewise.
* bfin-tdep.c (bfin_push_dummy_call): Likewise.
* cris-tdep.c (cris_sigcontext_addr)
(cris_sigtramp_frame_unwind_cache): Likewise.
* frv-linux-tdep.c (frv_linux_pc_in_sigtramp)
(frv_linux_sigcontext_reg_addr, frv_linux_sigtramp_frame_cache):
Likewise.
* frv-tdep.c (frv_pseudo_register_write, frv_analyze_prologue): Likewise.
* hppa-hpux-tdep.c (hppa32_hpux_find_global_pointer)
(hppa32_hpux_search_dummy_call_sequence)
(hppa_hpux_supply_save_state): Likewise.
* hppa-linux-tdep.c (insns_match_pattern)
(hppa_linux_find_global_pointer): Likewise.
* hppa-tdep.c (hppa_in_function_epilogue_p)
(skip_prologue_hard_way, hppa_frame_cache): Likewise.
* i386-nto-tdep.c (i386nto_sigcontext_addr): Likewise.
* i386fbsd-tdep.c (i386fbsd_supply_uthread)
(i386fbsd_collect_uthread): Likewise.
* ia64-hpux-tdep.c (ia64_hpux_push_dummy_code): Likewise.
* ia64-linux-tdep.c (ia64_linux_sigcontext_register_address): Likewise.
* ia64-tdep.c (examine_prologue, ia64_frame_cache)
(ia64_frame_prev_register, ia64_sigtramp_frame_cache)
(ia64_sigtramp_frame_prev_register, ia64_access_reg)
(ia64_access_rse_reg, ia64_libunwind_frame_this_id)
(ia64_libunwind_frame_prev_register)
(ia64_libunwind_sigtramp_frame_this_id)
(ia64_find_global_pointer_from_dynamic_section)
(find_extant_func_descr, find_func_descr, ia64_dummy_id)
(ia64_unwind_pc): Likewise.
* iq2000-tdep.c (iq2000_store_return_value): Likewise.
* m68hc11-tdep.c (m68hc11_push_dummy_call)
(m68hc11_extract_return_value): Likewise.
* m68klinux-nat.c (fetch_register, store_register): Likewise.
* mep-tdep.c (mep_pseudo_cr32_read, mep_pseudo_cr32_write)
(mep_get_insn, mep_push_dummy_call): Likewise.
* mips-linux-tdep.c (mips_linux_get_longjmp_target)
(mips_linux_in_dynsym_stub): Likewise.
* mn10300-tdep.c (mep_pseudo_cr32_write): Likewise.
* ppc-linux-nat.c (fetch_register, store_register): Likewise.
* regcache.c (dump_endian_bytes): Change type of parameter 'buf'
to gdb_byte.
* remote-mips.c (mips_set_register): Likewise.
* remote-sim.c (gdbsim_fetch_register): Likewise.
* score-tdep.c (score7_fetch_inst): Change type of parameter
'memblock' and local 'buf' to gdb_byte.
(score7_malloc_and_get_memblock): Change return type to gdb_byte.
Change type of local 'buf' to gdb_byte. Adjust.
(score7_adjust_memblock_ptr): Change type of parameter 'memblock'
to gdb_byte**.
(score7_analyze_prologue): Change type of 'memblock' and
'memblock_ptr' locals to gdb_byte*.
* sh64-tdep.c (sh64_extract_return_value)
(sh64_store_return_value): Change type of local 'buf' to gdb_byte.
* solib-darwin.c (darwin_current_sos, darwin_read_exec_load_addr):
* solib-pa64.c (pa64_solib_create_inferior_hook)
(pa64_open_symbol_file_object): Remove local 'buf'.
* solib-som.c (som_solib_create_inferior_hook, link_map_start)
(som_open_symbol_file_object): Likewise.
* solib-spu.c (spu_current_sos): Likewise.
* spu-linux-nat.c (spu_fetch_inferior_registers): Likewise.
* spu-multiarch.c (parse_spufs_run, spu_fetch_registers)
(spu_store_registers): Likewise.
* target.c (debug_print_register): Likewise.
* tic6x-tdep.c (tic6x_get_longjmp_target): Likewise.
* xstormy16-tdep.c (xstormy16_store_return_value)
(xstormy16_push_dummy_call, xstormy16_resolve_jmp_table_entry)
(xstormy16_find_jmp_table_entry): Likewise.
H.J. Lu [Thu, 28 Feb 2013 20:50:19 +0000 (20:50 +0000)]
Optimize REP prefix check
gas/
* config/tc-i386.c (_i386_insn): Add rep_prefix.
(md_assemble): Check if REP prefix is OK.
(parse_insn): Remove expecting_string_instruction. Set
i.rep_prefix.
gas/testsuite/
* gas/i386/i386.exp: Run inval-rep and x86-64-inval-rep.
Corinna Vinschen [Thu, 28 Feb 2013 09:09:02 +0000 (09:09 +0000)]
* win32-low.c: Throughout, fix format strings and casts of
printf-like functions to avoid type related warnings on all
platforms.
(get_child_debug_event): Print dwDebugEventCode as hex since
that's how it's usually documented.
Yao Qi [Thu, 28 Feb 2013 00:42:20 +0000 (00:42 +0000)]
gdb/gdbserver/
* gdb.trace/report.exp: Move some code to ...
(use_collected_data): New.
(top level): Call use_collected_data once on the live target.
Save at file of the current trace session, load it with target
tfile, and call use_collected_data again.
Alan Modra [Wed, 27 Feb 2013 23:11:56 +0000 (23:11 +0000)]
* target.h (Target::plt_fde_location, do_plt_fde_location): Declare.
* target.cc (Target::do_plt_fde_location): New function.
* ehframe.h (class FDE): Add post_map field to u_.from_linker,
accessor function, and constructor param.
(struct Post_fde, Post_fdes): Declare.
(Cie::write): Add post_fdes param.
* ehframe.cc (Fde::write): Use plt_fde_location.
(struct Post_fde): Define.
(Cie::write): Stash FDEs added post merge mapping.
(Eh_frame::add_ehframe_for_plt): Assert no new CIEs after mapping.
Adjust Fde constructor call. Bump final_data_size_ for post map FDEs.
(Eh_frame::do_sized_write): Arrange to write post map FDES after
other FDEs.
* powerpc.cc (Target_powerpc::do_plt_fde_location): New function.
(Target_powerpc::has_glink): New function.
(Target_powerpc::do_relax): Add eh_frame info for stubs.
(struct Eh_cie, eh_frame_cie, glink_eh_frame_fde_64,
glink_eh_frame_fde_32, default_fde): New data.
(Stub_table::eh_frame_added_): New var.
(Stub_table::find_long_branch_entry, stub_address, stub_offset):
Make const.
(Stub_table::add_eh_frame): New function.
(Output_data_glink::add_eh_frame): New function.
(Target_powerpc::make_glink_section): Call add_eh_frame.
Corinna Vinschen [Wed, 27 Feb 2013 19:42:26 +0000 (19:42 +0000)]
* windows-nat.c: Throughout, fix format strings and casts of
printf-like functions to avoid type related warnings on all
platforms.
(handle_output_debug_string): Fetch context information address
from debug string using string_to_core_addr.
Jiong Wang [Wed, 27 Feb 2013 14:58:18 +0000 (14:58 +0000)]
gdb/
* regformats/reg-tilegx.dat (name): Change abi name to "tilegx".
* regformats/reg-tilegx32.dat: New.
gdbserver/
* Makefile.in (clean): Remove reg-tilegx.c, reg-tilegx32.c.
(reg-tilegx32.c): New rule.
* configure.srv (tilegx-*-linux*): Add reg-tilegx32.o to srv_regobj.
* linux-tile-low.c (tile_arch_setup): New function. Invoke
different register info initializer according to elf class.
(init_registers_tilgx32): New function. The tilegx32 register info
initializer.
(tile_fill_gregset): Use "uint_reg_t" to represent register size.
(tile_store_gregset): Likewise.