Re: How to remove extra assembly code

Hi Ericxu833, gcc.exe -g -O0 -x c -fno-exceptions -fno-stack-protector -fno-ident test.c -o test.exe I used IDA pro to reverse engineer test.exe and found that gcc added "call __main" to the front of the assembly code, and then executed "jmp __do_global_ctors". I guess this code means to ins

Re: Problems when building NT kernel drivers with GCC / LD

Hi Pali, Hello! Just for a record, I filled individual issues to bugzilla: https://sourceware.org/bugzilla/show_bug.cgi?id=30004 https://sourceware.org/bugzilla/show_bug.cgi?id=30139 https://sourceware.org/bugzilla/show_bug.cgi?id=30140 https://sourceware.org/bugzilla/show_bug.cgi?id=30141 https

Re: Problems when building NT kernel drivers with GCC / LD

Hi Pali, Hello! I would like to remind this thread for gcc/binutils developers. Most of these issues are still present and cause problems for compiling native PE binary. If you have questions or you need any other information please let me know. Have bug reports been filed for the individual i

Re: Error: attempt to get value of unresolved symbol `L0'

Hi Pali, Hi Richard, Having file name and line number would be also useful as it took me some time to figure out where is the issue... Right - I have tried a little harder and come up with a follow up patch. This is now checked in, and given an input file that looks like this: % cat t.s k

Re: Error: attempt to get value of unresolved symbol `L0'

Hi Pali, Hi Richard, Interesting... Another test case which is working fine: kernoffs: .word 0x4 - (. - 0x0) This works because this expression can be converted into an instruction and a relocation in the object file: % as t.s -o t.o % objdump -dr t.o Disassembly of section .

Re: Forward GCC '-v' command-line option to binutils assembler, linker (was: [PING] nvptx: forward '-v' command-line option to assembler, linker)

Hi Thomas, +/* Linker supports '-v' option. */ +#define LINK_SPEC "%{v}" ..., Tom rightfully asked: [...] I wonder, normally we don't pass -v to ld, and need -Wl,-v for that. So, on my quest for making things uniform/simple, I now wonder: should we also forward GCC '-v' to binutils linke

Re: Counting static __cxa_atexit calls

Hi Florian, What would be the most ELF-flavored way to implement this? After the final link, I expect that the count (or counts, we need a separate counter for thread-local storage) would show up under a new dynamic tag in the dynamic segment. This is actually a very good fit because older loa

Re: [committed] exec-stack warning for test which wants executable stacks

Hi Jeff, Just FYI - I am also looking at adding in another warning. This time for when the linker creates a PT_LOAD segment which has all of the RWX flags set. At the moment my testing seems to show that it only causes problems when a custom linker script is used that defines its own pr

Re: [committed] exec-stack warning for test which wants executable stacks

Hi Jeff, I used -z execstack rather than --no-warn-execstack as the former is recognized by older versions of ld, but the latter is a new option. Thanks for it. Unfortunately, I should have looked at the other failures that have popped up over the last week.  Essentially all the nested functio

Re: [CVE] zlib (< 1.2.12) memory corruption

Hi Luis, There is a CVE [1] for zlib < 1.2.12 (released march 27th). GCC currently uses zlib 1.2.11, and binutils-gdb imports the zlib directory from GCC. The recommendation is to get it updated to 1.2.12, which contains the proper fix [2]. Right - I have now updated the binutils-gdb mainl

Re: [CVE] zlib (< 1.2.12) memory corruption

Hi Luis, There is a CVE [1] for zlib < 1.2.12 (released march 27th). GCC currently uses zlib 1.2.11, and binutils-gdb imports the zlib directory from GCC. The recommendation is to get it updated to 1.2.12, which contains the proper fix [2]. I am all for updating the binutils-gdb copy of zli

Re: Making *-netbsd-* to mean ELF not a.out for all CPUs

Hi John, But they did offer some tentative support for my second suggestion of changing the meaning of bare "netbsd" --- "netbsdaout" would still be available to unambiguously request a.out for anyone that wants it. I think that this would be OK for the binutils, providing that when configur

Accessing fields in the global_options structure from out-of-sync plugins

Hi Guys, With the annobin plugin for gcc I have a problem accessing some of the fields in the global_options structure. Although the plugin can use the macros defined in options.h, this only works if the plugin is in sync with gcc. If the plugin was built for one version of gcc, but ru

Fall 2017 GNU Toolchain Update

Hi Guys, A new version of GLIBC and a whole boatload of new GCC features means that there is lots to report this time. --- GLIBC: Version 2.26 is now out. There are loads of new features and bug fixes in this release. Some

Re: RFC: Update top level libtool files

Hi Joseph, > As per previous discussions on the issue: it's necessary to revert libtool > commit 3334f7ed5851ef1e96b052f2984c4acdbf39e20c, see > . OK - thanks for that pointer. > I do not know > if there are other local libtool changes

RFC: Update top level libtool files

Hi Guys, I would like to update the top level libtool files (libtool.m4, ltoptions.m4, ltsugar.m4, ltversion.m4 and lt~obsolete.m4) used by gcc, gdb and binutils. Currently we have version 2.2.7a installed in the source trees and I would like to switch to the latest official version: 2.

Summer 2017 GNU Toolchain Update

Hi Guys, It has been a long time since my last post on the developments in the toolchain, so there is lots to report: --- Binutils: Version 2.29 has been released. In addition to previous changes already detailed in this bl

March 2017 GNU Toolchain Update

Hi Guys, There is a lot to tell you about this time. First up is glibc: The GNU C Library version 2.25 is now available. In this version you will find: * Provisional support for ISO/IEC TR 24731-1:2010 which provides replacement versions of many of the memory allocation functions

Re: November 2016 GNU Toolchain Update

Hi Gerald, > Thanks for that update, Nick. Surely interesting reading. > Are you planning another update for March or so? ;-) Thanks for the ping! I have been intending to write another update for the last month or so, but I keep on letting it slip. :-( I will make it my top priority for this w

Re: RFC: Treat plugins as first class citizens

Hi Richard, >> I was thinking that it would be nice to make plugins a "first-class >> citizen" in the gcc world by having a proper directory structure and >> integration into the rest of gcc. > I believe plugins are currently a hack due to the lack of a clearly defined > API to access GCC inte

RFC: Treat plugins as first class citizens

Hi Guys, I was thinking that it would be nice to make plugins a "first-class citizen" in the gcc world by having a proper directory structure and integration into the rest of gcc. For example: gcc/plugins <-- Everything plugin-y starts here gcc/plugins/Make-lang.in <--

November 2016 GNU Toolchain Update

Hi Guys, Long time, no post. Sorry about that. So, in order to make up for it, here is an extra long update on the state of the GNU toolchain: In GCC land, 6.2 has now been released and GCC 7 is almost ready to branch. Here are the new features that you can expect to find in GCC 7:

Re: [PATCH MIPS] Work around Bash 4.2 bug

Hi Maciej, >>> The patch below works around the Bash 4.2 bug described at >>> . >> >>> * emulparams/elf32bmipn32-defs.sh: Shift quote of >>> "x$EMULATION_NAME" to the left to work around >>>

August 2016 GNU Toolchain Update

Hi Guys, It has been a long time since my last post, so there is lots to tell you about. First of all there have been major releases of most of the tools: GCC 6.2 is here. This is mostly a bug-fix release over gcc 6.1 of course, but it does also include a few enhancements for the SPAR

April/May 2016 GNU Toolchain Update

Hi Guys, Well now that GCC 6 is out lets see what new features have started to appear in the toolchain: Several new warning options have been added to GCC: * The option -Wno-duplicate-decl-specifier has been added to generate warnings whenever a declaration contains duplicate const

February/March 2016 GNU Toolchain Update

Hi Guys, There are lots of new features to report about this time, so here goes: * GDB 7.11 has been released. This release brings many new features and enhancements, including: + Per-inferior thread numbers. (thread numbers are now per inferior instead of being global).

December/January (15/16) GNU Toolchain Update

Hi Guys, First of all I have an apology to make. I managed to reformat my hard drive over the holidays, wiping away all of my notes for this blog. In particular I was contacted by a reader about an enhancement to gcc's inline assembler support which I have now totally lost. :-( So, de

October/November GNU Toolchain Update

Hi Guys, Sorry for the delay between these updates. My new job is keeping me very busy... Anyway here are the highlights of the changes in the GNU toolchain over the last two months: The compiler and assembler now have support for the ARC EM/HS and ARC600/700 architectures and the Po

Commit: MSP430: Add support for more MCUs

at if the MCU name is not recognised the compiler will assume that is only supports the MSP430 instruction set, and that it does not have any hardware multiply support. Tested with no regressions on an msp430-elf toolchain. Cheers Nick gcc/ChangeLog 2015-10-12 Nick Clifton * c

Re: September 2015 GNU Toolchain Update

Hi Alan, On Fri, Sep 25, 2015 at 01:33:34PM +0100, Nick Clifton wrote: * The new PowerPC64 specific linker command line option --no-save-restore-funcs tells the linker not to provide the out-of-line register save and restore functions used by -Os compiled code. The default

September 2015 GNU Toolchain Update

Hi Guys, There are lots of things to report in this month's update... * The G++ ABI has been increased to version 10. This adds mangling of attributes that affect type identity, such as ia32 calling convention attributes (e.g. stdcall). ABI conflicts can be detected with -Wabi

July/August GNU Toolchain update

Hi Guys, Sorry for the delay in bringing you this update; I have been very busy in the last few months. Anyway the highlights of the changes to the GNU Toolchain are as follows: * The GDB 7.10 branch has been created. Expect a release soon. * Support for tracepoints on aarch64-linu

June 2015 GNU Toolchain Update

Hi Guys, In this month's news we have: * GCC now supports a "noplt" function attribute. This specifies that the annotated function should not be called via the PLT mechanism. * GCC now supports a "target ()" function attribute to enable target specific options on individual fu

May 2015 Toolchain Update

Hi Guys, There are several things to report this month: * GCC now supports targets configured to use the MUSL C library: http://www.musl-libc.org/ * The Compiler has a new warning option: -Wmisleading-indentation This generates warnings when the indentation of the

April GNU Toolchain Update

Hi Guys, This is an experimental posting of an extended version of my gcc blog. Every month I post an update covering changes in gcc, the binutils, newlib, and gdb here: http://nickclifton.livejournal.com/ It was suggested that readers of this mailing list might be interested in t

mips64vr-elf fails to build

Hi Eric, Hi Richard, The mips64vr-elf target currently fails to build in FSF mainline because: libgcc/unwind-dw2.c:1159:1: internal compiler error: in output_555, at config/mips/mips.md:6024 which is here: (define_insn "casesi_internal_mips16_" [(set (pc) (if_then_else

Re: stabs support in binutils, gcc, and gdb

Hi David, What is the status of STABS support? Essentially it is in maintenance mode. But this is due to lack of developers interested in extending STABS support, rather than a policy of maintenance-only. Are there any plans to deprecate STABS support? No, none. If STABS enhancemen

Help: ICE in variable_post_merge_new_vals()

Hi Guys, The RX port is not currently building in the mainline sources because of the following ICE: libgcc/unwind-dw2-fde.c: In function 'add_fdes': libgcc/unwind-dw2-fde.c:721:1: internal compiler error: in variable_post_merge_new_vals, at var-tracking.c:4303 } ^ 0x86f0bed variable

Unable to build M32C gcc port

Hi Richard, Hi DJ, I am currently unable to build m32c gcc port because the set_optab_handler function has been deleted: gcc/config/m32c/m32c.c:1873: undefined reference to `set_optab_handler' I looked at the code in m32c.c: static void m32c_init_libfuncs (void) { /*

Re: No documentation of -fsched-pressure-algorithm

Hi Richard, Well, given the replies from you, Ian and Vlad (when reviewing the patch), I feel once again in a minority of one here :-) but... I just don't think we should be advertising this sort of stuff to users. OK, what about Ian's suggestion of controlling the algorithm selection via a -

Re: No documentation of -fsched-pressure-algorithm

Hi Richard, Also - why shouldn't it be a user-level option ? In my experience gcc's instruction scheduling tends to be very sensitive to the algorithm being compiled. For some applications it does a good job, but for others it actually makes the performance worth. Being able to tune the behav

Re: No documentation of -fsched-pressure-algorithm

Hi Richard, I have just noticed that the new -fsched-pressure-algorithm= gcc command line option is not documented in gcc/doc/invoke.texi. Was this an oversight ? No, it was deliberate. It's not supposed to be a user-level option. Then why is there a user-visible command line opti

No documentation of -fsched-pressure-algorithm

Hi Richard, I have just noticed that the new -fsched-pressure-algorithm= gcc command line option is not documented in gcc/doc/invoke.texi. Was this an oversight ? Cheers Nick

Re: RFC: Collecting together binary file attributes into a single file.

Hi Richard, I don't think it's a good idea to have the attributes of every CPU we support in a single file. That's going to get unmaintainable very quickly. Really - why ? These attributes are mostly static. Some new ones might be added from time to time, but baring the introduction of new

RFC: Collecting together binary file attributes into a single file.

Hi Guys, All I wanted to do was to make GCC's ARM assembler output slightly easier to read... I would like to propose a patch to create a new header file in the include/ directory. This file would contain enums describing the attributes that be can found in SHT_GNU_ATTRIBUTES sections.

Re: RFC: Add zlib source to src CVS resposity

Hi H.J. Right - this decision has been made. We are not going to include zlib the in the binutils sources. Thanks for suggesting the idea and working on the patch, but in the end it was just not a path we wanted to go down. Cheers Nick Clifton

Re: RFC: Add zlib source to src CVS resposity

Hi Guys, >>> So this becomes a question for the binutils maintainers: do the binutils want to be self-contained, or do they want to follow the path of gcc and require additional libraries to be installed before a build can succeed? As I see it the pros of having a copy of the zlib sources in t

Re: Alignment error

Hi Thomas, [Note: You sent this to g...@sourceware.org but the correct address to use is g...@gcc.gnu.org]. int* pInt = (int*)0x10002004; //word-aligned char* pChar = (char* )0x10003005; //non-word-aligned *pInt = 0x34; *pChar = 'A'; The assembly mnemonic

Re: Support for VLE code in PowerPC

Hi Kaushik, We are planning to support the same in binutils, gcc and newlib. Please let us know if you have any suggestions to implement this support for easier FSF approval. Please make sure that you have an FSF Binutils Copyright assignment in place. Please follow the GNU Coding Standards

Re: gcc --help for options which are not warnings or optimizations

Hi Ian, Hi Diego, > Diego Novillo wrote: --help=other? That works. :-) Actually, there already is a qualifier which will select -fstack-protector, I had just forgotten about it: % gcc --help=common | grep stack -Wstack-protector Warn when not issuing stack smashing protectio

Re: gcc --help for options which are not warnings or optimizations

Hi Ian, Nick, how is gcc --help supposed to work for options which are neither warnings nor optimizations? For example, -fstack-protector. Is there a --help option which will display it? Yes - but only the generic "--help --verbose" rather than a more qualified version. My original goal w

Re: For backend maintainers: changes for C++ compatibility

Hi Ian, I would like to ask the maintainers for backends which I did not mention to bootstrap their targets if possible, and/or to build them with a newly built mainline compiler, to see if there are new warnings about C++ compatibility. For the record I have tested the fr30, iq2000, m32r, mco

Re: [Ada] runtime license wording change and Ada bootstrap, gcc/ada/scn.adb Determine_License

Hi Laurent, The license wording will soon be changed and Ada gcc/ada/scn.adb (function Determine_License) currently checks about licence. Any change to the wording breaks Ada bootstrap as Jakub found out. How should we proceed? I have already changed the patch under development so that the te

Re: New Failure in GCC testsuite from PR35318

Hi Jakub, The test needs double, otherwise it wouldn't fail with a buggy cc1 on i?86. I've been initially contemplating putting the testcase into gcc.target/i386/, but then thought it would be good to test this on a couple of other arches too. Guess it can be limited to a couple of targets whic

New Failure in GCC testsuite from PR35318

Hi Jakub, You recently added gcc.c-torture/compile/pr35318.c to the gcc testsuite. This has introduced a new group of failures for the m32c port because of this error message: pr35318.c: In function 'foo': pr35318.c:7: error: can't find a register in class 'GENERAL_REGS' while rel

Re: GNU LD fails to generate correct ARM Thumb veneer

Hi Aaron, - the first file to be linked is an ARM assembly .s file that contains the ARM vector table and handler addresses. the vector table is in a separate section called .VhaInit. Did you know that you can use the KEEP directive in a linker script (or a linker script fragment) i

Re: GNU linker ld

Hi Duncan, I am in the process of verifying that the GNU linker (gcc 3.3.2 VxWorks AE653) The GNU linker is not part of the GCC project. It is part of the Binutils project, so this question really should be asked on the binutils mailing list: [EMAIL PROTECTED] However, does ld include a

Re: GCC 4.3 target deprecation proposals

Hi Joseph, I have posted some results for the xstormy16-elf target. They are not great (614 failures) but I do hope that this can target can be removed from the potential deprecations list. Cheers Nick

Re: GCC 4.3 target deprecation proposals

Hi Joseph, Well the IQ2000 port is still of interest to us, and I am still happy to maintain it, so here are some test results: Test Run By nickc on Wed Jan 23 10:37:48 2008 Target is iq2000-unknown-elf Host is i686-pc-linux-gnu === gcc tests === Schedule of variations:

Re: RFH: GPLv3

Hi Krzysztof, I hope the COPYING or similar file will contain the licence text under which the code is distributed? Actually the plan is to create a new file - COPYING_v3 - which will contain the GPL version 3 and then change the copyright header in source files over to say "version 3 (or la

Re: RFH: GPLv3

Hi David, 2. Turn off public access to the code while changing license text in the source. This is not necessary. (I am assuming here that by "public access to the code" you mean access to the svn repository, not access to the various release tarballs). The repository sources are not an of

Re: RFH: GPLv3

Hi Mark, Will someone (or someones) please volunteer to change the various files that mention GPLv2 to mention GPLv3 instead, to change the COPYING file in the gcc/ directory, and to look for other things that need to change? I volunteer. It has not yet been decided what to do about files th

Re: Why does linker fail to resolve dependencies within the same .a file?

Hi Christian, [I have restored the CC to gcc@gcc.gnu.org as there may be other people interested in this discussion]. foo.o -lbar baz.o -lbar The second "-lbar" is only needed if baz.o includes references to symbols that are defined in libbar.a which will not be pulled in when resolving

Re: Why does linker fail to resolve dependencies within the same .a file?

Hi Christian, /usr/bin/c++ -fPIC "CMakeFiles/simpleIO.dir/main_IO.o" -o simpleIO -rdynamic -L/home/cjc/csc583-svn/uriVisionLib/trunk/Development/Source/C++ -lGL -lglut -Wl,-Bstatic -luriVision -luriVision -Wl,-Bdynamic -Wl,-rpath,/home/cjc/csc583-svn/uriVisionLib/trunk/Development/Source/C++ N

RFC: Extending --help

Hi Guys, Last month I submitted a patch to add a new switch to gcc: --print-optimizers. The idea of this switch was that it would only display those switches that controlled optimizations, and that it would show their current status (activated/not activated). Mark Mitchell suggested th

Re: Fwd: Re: gcc 4.1.1 for mcore

Hi Alex, Right - you should be able to build the MCore port now. At least as far as newlib/libgloss/libiberty anyway. libstdc++-v3 does not build at the moment due to a problem unrelated to the 64-bit build OS issue, but I assume that this does not bother you. (You will need the latest g

Re: Fwd: Re: gcc 4.1.1 for mcore

Hi Alex, this is the error message I'm getting: /tmp/ccvk5vjH.s:38: Error: operand must be absolute in range 1..32, not 53 I run on a Linux machine with AMD CPU (x86_64). Ah yes this problem. I have encountered it too. Presumably you are using a 64-bit Linux ? If you build in a 32-bit e

Re: Stepping down as SH maintainer

Hi Joern, I have decided to accept employment at ARC International, so effective 11th December 2006, I will step down as an active SH maitainer. Thank you very much for all the hard work you have out in to maintaining the SH port (not just in binutils, but in gcc as well). Cheers Nick

Re: BFD Error a regression?

Hi Jerry, While compiling LAPACK with -O3 -funroll-loops -march=nocona I got the following error message: BFD: BFD 2.16.91.0.6 20060212 internal error, aborting at ../../bfd/elfcode.h line 190 in bfd_elf32_swap_symbol_in If you are able to reproduce this bug, then please try using the lates

Re: type consistency of gimple

Hi Diego, Jeff's point about our optimizers is also true. Nick, remember that issue with MIPS optimizations you were discussing with Jeff a few days ago? I didn't follow most of the details, but it involved ivopts and sign issues. Could you send a summary? Sure: I was looking at how a gc

Re: PATCH: Update src/intl from gcc/intl

Hi Steve, OK, Here is an official patch proposal to replace the contents of the src/intl tree with the bits from gcc/intl. 2006-05-19 Steve Ellcey <[EMAIL PROTECTED]> * MAINTAINERS: Change intl updating instructions. * config.rpath: Copy from GCC tree. * intl: Repla

Re: Any plan to support Windows/x86-64?

Hi H. J. Is there any plan to support Windows/x86-64? No and yes. I think that we would like to support this target, but we just need contributers to work on it. (I am pretty sure that some people are working on it, but they may not be ready to contribute yet). What are needed for the p

Assembling pending decls before writing their debug info

Hi Guys, There is a problem with unit-at-a-time compilation and DWARF debug info generation. Consider this small test case which has been derived from GDB's observer.c source file: int observer_test_first_observer = 0; int observer_test_second_observer = 0; int observer_test_th

Re: Obsoleting more ports for 4.0.

Hi Kazu, > fr30 > > > The same justification as > >http://gcc.gnu.org/ml/gcc/2004-06/msg01113.html > > Nobody showed an interest in keeping this port. I would like to keep this port alive. I happen to know that Fujitsu are still involved with developing and marketing it and that the

Re: gcc with arm -vfp instructions

Hi Aram, i like to know whether gcc can generate vfp instructions.. This is a GCC question not a binutils question. Please ask it on the gcc mailing list: [EMAIL PROTECTED] if then, whether it will be supported on binutils and the gdb simulator The assembler and linker will support vfp instr

Re: help regarding ld

Hi Aram, i am using the arm-elf-gcc compiler to generate the assembly code arm-elf-gcc -mthumb -S new.c after this i use the arm-elf-as for genrating machine code arm-elf-as new.s Note - these two steps could be combined into one by using the -c switch instead of the -S switch: arm-elf-gcc -

Re: interworking problem

Hi Aram, i have gone through the a.out file after this error. > that is producing full of arm instructions other than the main function(which is compiled for -mthumb). where should i change for this corresponding error. It is not clear what question you are asking here. Ian has pointed out th