267654 |
20-Jun-2014 |
gjb |
Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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245777 |
22-Jan-2013 |
kib |
MFC r245133: Only assign the environ in the startup code when environ is NULL.
Note that this is not the merge, but a reimplementation of the fix, done for the not-consolidated code in the stable/9.
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234726 |
27-Apr-2012 |
dim |
MFC r234502:
After r217375, some startup objects under lib/csu are built in a special way: first they are compiled to assembly, then some sed'ing is done on the assembly, and lastly the assembly is compiled to an object file.
This last step is done using ${CC}, and not ${AS}, because when the compiler is clang, it outputs directives that are too advanced for our old gas. So we use clang's integrated assembler instead. (When the compiler is gcc, it just calls gas, and nothing is different, except one extra fork.)
However, in the .s to .o rules in lib/csu/$ARCH/Makefile, I still passed CFLAGS to the compiler, instead of ACFLAGS, which are specifically for compiling .s files.
In case you are using '-g' for debug info anywhere in your CFLAGS, it causes the .s files to already contain debug information in the assembly itself. In the next step, the .s files are also compiled using '-g', and if the compiler is clang, it complains: "error: input can't have .file dwarf directives when -g is used to generate dwarf debug info for assembly code".
Fix this by using ${ACFLAGS} for compiling the .s files instead.
Reported by: jasone
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225736 |
23-Sep-2011 |
kensmith |
Copy head to stable/9 as part of 9.0-RELEASE release cycle.
Approved by: re (implicit)
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217375 |
13-Jan-2011 |
dim |
Apply a workaround for a binutils issue with the .note.ABI-tag section generated from lib/csu/common/crtbrand.c (which ultimately ends up in executables and shared libraries, via crt1.o, gcrt1.o or Scrt1.o).
For all arches except sparc, gcc emits the section directive for the abitag struct in crtbrand.c with a PROGBITS type. However, newer versions of binutils (after 2.16.90) require the section to be of NOTE type, to guarantee that the .note.ABI-tag section correctly ends up in the first page of the final executable.
Unfortunately, there is no clean way to tell gcc to use another section type, so crtbrand.c (or the C files that include it) must be compiled in multiple steps:
- Compile the .c file to a .s file. - Edit the .s file to change the 'progbits' type to 'note', for the section directive that defines the .note.ABI-tag section. - Compile the .s file to an object file.
These steps are done in the invididual Makefiles for each applicable arch.
Reviewed by: kib
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217105 |
07-Jan-2011 |
kib |
Add section .note.GNU-stack for assembly files used by 386 and amd64.
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216338 |
09-Dec-2010 |
dim |
Let all .c and .S files under lib/csu consistently use the __FBSDID() macro for identification, instead of several different hand-rolled variants (plain .ident, .ascii, etc).
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204756 |
05-Mar-2010 |
uqs |
Properly declare non-extern functions in crt1
Also move the declarations after __progname consistently to make the distinction clearer.
Reviewed by: jmallett Approved by: ed (co-mentor)
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200038 |
02-Dec-2009 |
kib |
Properly support -fPIE by linking PIE binaries with specially-built Scrt1.o instead of crt1.o, since the later is built as non-PIC.
Separate i386-elf crt1.c into the pure assembler part and C code, supplying all data extracted by assembler stub as explicit parameters [1]. Hide and localize _start1 symbol used as an interface between asm and C code.
In collaboration with: kan Inspired by: PR i386/127387 [1] Prodded and tested by: rdivacky [1] MFC after: 3 weeks
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181997 |
22-Aug-2008 |
kib |
Add -fno-omit-frame-pointer to CFLAGS used to compile crt1.c on amd64.
For gcc' __builtin_frame_address() to work, all call frames need to save frame pointer. In particular, this is important for the upper frame that should terminate the chain.
No objections from: jhb PR: amd64/126543 MFC after: 1 week
|
151072 |
07-Oct-2005 |
bde |
Fixed profiling of main() for amd64 and i386. This started rotting in 1993 in rev.1.5 of the i386 a.out version (csu/i386/crt0.c). Profiling uses a magic label "eprol" to delimit the start of the part of the text section covered by profiling. This label must be placed before the call to main() to get main() properly profiled. It was placed there in rev.1.1 of crt0.c. Rev.1.5 imported the initial implementation of shared libraries in FreeBSD and misplaced the label. Fortunately, the misplaced label was misspelled and the old label wasn't removed, so the new label had no effect. Unfortunately, when profiling was implemented for the ELF in 1998 in rev.1.2 of csu/i386-elf/crt1.c, only the incorrectly placed label was copied (after fixing its name). The bug was then copied to all other arches. The label seems to be still misplaced in NetBSD for most arches. It is in common.c for most arches so it is even further from being inside the function that calls main().
I think "eprol" is short for "end of prologue", but it must be placed before the end of the prologue so that it covers main(). crt0.c has it before the calls atexit(_mcleanup) and monstartup(...), but it cannot affect these calls so I moved it after the call to monstartup(). It now also covers the call to _init() but not the newer call to _init_tls(). Profiling of _init() seems to be harmless, and the call to _init_tls() seems to be misplaced.
Reviewed by: jdp (long ago, for a slightly different i386 version)
|
133754 |
15-Aug-2004 |
dfr |
Add support for TLS in statically linked programs.
|
127252 |
21-Mar-2004 |
peter |
Adjust stack alignment so that when the 'call xxx' functions are gathered into the middle of the _init and _fini sections, they get executed with their expected stack alignment.
|
117074 |
30-Jun-2003 |
ru |
MFi386: revision 1.19.
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114319 |
30-Apr-2003 |
peter |
Update for AMD64. repocopied from i386-elf/crt1.c. Deal with regparm argument passing rather than stack based args. The kernel passes the base of the argument/env vector in %rdi (arg1).
|
109905 |
26-Jan-2003 |
markm |
make these more useful for lint(1). Minor diff-reductions while I'm about it.
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107460 |
01-Dec-2002 |
bde |
Backed out previous commit (alignment suitable for RELENG_4) as planned since it has been MFC'ed. See the log message for the previous commit for more details. The alignment bug in gcc-3 has not been fixed, but it is not very serious and the previous commit just moved it (as intended).
Approved by: re (murray)
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104143 |
29-Sep-2002 |
bde |
Align the stack suitably for the version of gcc in FreeBSD-4 (provided -fomit-frame-pointer is not used). This is mostly moot for -current because gcc-3 does the alignment (slightly incorrectly) in main().
This patch is intended for easy MFC'ing and should be backed out in -current soon since it causes compiler warnings and better fixes are possible in -current. The best fix is to do nothing here and wait for gcc to do stack alignment right. gcc-3 aligns the stack in main(), but does it too late for main()'s local variables and too late for anything called before main(). A misaligned stack is now more than an efficiency problem, since some SSE instructions in some or all (hardware) implementations trap on misaligned operands even if alignment checking is not enabled.
PR: 41528: Submitted by: NIIMI Satoshi <sa2c@sa2c.net> (original version) MFC after: 3 days
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100872 |
29-Jul-2002 |
ru |
Drop support for COPY, -c has been the default mode of install(1) for a long time now.
Approved by: bde
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100167 |
16-Jul-2002 |
markm |
The main reason for this is to reduce diffs between all the crt1.c's.
Assembler macros are tidied up and made as similar as sanely possible. The macros are translated into C (__inline static) functions for lint.
Declaration orders are made the same. Declarations are all ISOfied and tidied up.
Comment contents have gratuitous diffs removed.
The net result is a bunch of crt1.c's that are 90% the same. It may be possible to now encapsulate the differences in one MD header, and have only one MI crt1.c file (although the macros to do this may be ugly).
Helpful comments by: obrien, bde Alpha tested by: des i386-elf tested by: markm
|
99354 |
03-Jul-2002 |
markm |
Whitespace diffs only; this brings this file into the same whitespace convention as src/lib/csu/*/crt1.c.
This will make the follow up diffs easier to see and extract.
|
96632 |
15-May-2002 |
obrien |
Use .rodata section for $FreeBSD$.
|
96530 |
13-May-2002 |
ru |
Fixed CLEANFILES after bsd.lib.mk sweep.
|
96516 |
13-May-2002 |
ru |
SOBJS are not used here for a long time, and were just pessimising the `install'.
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96512 |
13-May-2002 |
ru |
Major cleanup of bsd.lib.mk.
Get rid of the INTERNALSTATICLIB knob and just use plain INTERNALLIB. INTERNALLIB now means to build static library only and don't install anything. Added a NOINSTALLLIB knob for libpam/modules. To not build any library at all, just do not set LIB.
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96463 |
12-May-2002 |
ru |
Revert the last change. The corresponding bsd.lib.mk changes were already backed out.
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96411 |
11-May-2002 |
obrien |
Use the simpler NOMAN rather than NOMAN, NOPIC, NOPROFILE, INTERNALLIB.
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95721 |
29-Apr-2002 |
bde |
Removed "-fkeep-inline-functions" from CFLAGS, since it now has no effect except to generate spurious warnings about a system header <sys/param.h> having some inline functions (the bswap family). This backs out the main part of rev.1.5 (which was the only part left). The problem fixed by rev.1.5 of the Makefile went away in rev.1.5 of ../common/crtbegin.c when the references to do_ctors() and do_dtors() in the latter were moved from inline asm to C code.
This leaves the problem that implementation details cause warnings.
Discussed with: jdp
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93399 |
29-Mar-2002 |
markm |
Do not use __progname directly (except in [gs]etprogname(3)). Also, make an internal _getprogname() that is used only inside libc. For libc, getprogname(3) is a weak symbol in case a function of the same name is defined in userland.
|
91430 |
27-Feb-2002 |
obrien |
Minor style(9) nit + utilize ELF features for the FreeBSD ID.
|
85594 |
27-Oct-2001 |
obrien |
minor style updating
|
67811 |
28-Oct-2000 |
obrien |
* Bring back the guts of crt{i,n}.S. This allows C++ exceptions to work when using the egcs and gcc-devel ports, along with GCC built from stock public FSF sources. With out this change, FreeBSD will be removed from the list of systems GCC 3.0 must be evaluated on before release. With the effort some of us put into getting FreeBSD on this list, we should not turn this effort into a waste, else we might not be worth fighting for in the future. (note that Alpha and IA-64 versions of crt{i,n}.S are needed)
* Switch from our own crt{begin,in} to those created from GCC's crtstuff.c. This will allow us to switch to DWARF2 exceptions in the future, along with staying in sync with any future GCC requirements.
* Break out our ELF branding bits into a seperate file. Currently this is now included by our crt1.c files (since this functionality was part of our native crtbegin.c). Later crtbrand.o will be merged in the creation of crti.o.
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60734 |
20-May-2000 |
jdp |
Take crtbegin.c and crtend.c from the new machine-independent "common" sister directory.
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60698 |
19-May-2000 |
jdp |
This is step 1 in an effort to unify the start-up files for the various architectures. Now all the work is done in crtbegin.c. It doesn't contain any assembly language code, so it should work fine on all architectures. (I have tested it on the i386 and the alpha.) The old assembly language files crt[in].S are now empty shells that generate no code or data. They should not be removed any time soon, because the various versions of gcc in src and ports expect them to exist.
Next I will move crtbegin.c into a new common machine-independent directory, and adjust the i386-elf Makefile to use that version. After that I will adjust the alpha Makefile to use the common version too.
Requested by: obrien
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59342 |
18-Apr-2000 |
obrien |
Change our ELF binary branding to something more acceptable to the Binutils maintainers.
After we established our branding method of writing upto 8 characters of the OS name into the ELF header in the padding; the Binutils maintainers and/or SCO (as USL) decided that instead the ELF header should grow two new fields -- EI_OSABI and EI_ABIVERSION. Each of these are an 8-bit unsigned integer. SCO has assigned official values for the EI_OSABI field. In addition to this, the Binutils maintainers and NetBSD decided that a better ELF branding method was to include ABI information in a ".note" ELF section.
With this set of changes, we will now create ELF binaries branded using both "official" methods. Due to the complexity of adding a section to a binary, binaries branded with ``brandelf'' will only brand using the EI_OSABI method. Also due to the complexity of pulling a section out of an ELF file vs. poking around in the ELF header, our image activator only looks at the EI_OSABI header field.
Note that a new kernel can still properly load old binaries except for Linux static binaries branded in our old method.
* * For a short period of time, ``ld'' will also brand ELF binaries * using our old method. This is so people can still use kernel.old * with a new world. This support will be removed before 5.0-RELEASE, * and may not last anywhere upto the actual release. My expiration * time for this is about 6mo. *
|
50476 |
28-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
|
44789 |
15-Mar-1999 |
jdp |
Add "-fkeep-inline-functions" to CFLAGS so that higher optimization levels (-O3 and above) won't remove essential code. Many thanks to Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru> for pointing out that it was the optimizer's removal of this code that caused make world with -O3 to break. With this change, make buildworld now completes.
|
44691 |
12-Mar-1999 |
jdp |
Move the code for the ".init" and ".fini" sections outside of a C function so the compiler won't try to emit line numbers for it with "-g", breaking the build. This has the nice side-effect of making crtbegin.o and crtbeginS.o a little bit smaller.
Remove "-Wno-unused" from the Makefile. Replace it with "__unused" on particular function and variable declarations.
|
42450 |
09-Jan-1999 |
jdp |
Switch to using ".So" as the extension for PIC object files rather than ".so". The old extension conflicted with well-established naming conventions for dynamically loadable modules.
The "clean" targets continue to remove ".so" files too, to deal with old systems.
|
42049 |
24-Dec-1998 |
steve |
Strip the leading path from __progname as is done in the a.out case. Also bring in stddef.h so we can use NULL instead of 0 for pointer comparisons.
Hinted at by: Bruce Evans Reviewed by: John Polstra
|
38928 |
07-Sep-1998 |
jdp |
Make profiling work for ELF. gprof now autodetects the format of the executable file, so it will work for both a.out and ELF format files. I have split the object format specific code into separate source files. It's cleaner than it was before, but it's still pretty crufty.
Don't cheat on your make world for this update. A lot of things have to be rebuilt for it to work, including the compiler and all of the profiled libraries.
|
34198 |
07-Mar-1998 |
jdp |
Import C startup files for ELF support.
Submitted by: John Polstra <jdp@polstra.com>
|