src/lib/csu/i386-elf, branch release/10.4.0

Unbreak lib/csu for i386 and amd64 (MK_LIB32 == yes) after r313582

2017-02-11T20:46:49Z

I accidentally goofed up the directory for lib/libc in the CFLAGS This is a direct commit to this branch Pointyhat to: ngie

MFC r312455:

2017-02-11T05:47:56Z

Use SRCTOP-relative paths and .CURDIR with :H instead of ".." specified paths This implifies pathing in make/displayed output

MFC r292000: Remove historical GNUC test

2016-05-20T19:14:15Z

The requirement is for a GCC-compatible compiler and not necessarily GCC itself. However, we currently expect any compiler used for building the whole of FreeBSD to be GCC-compatible and many things will break if not; there's no longer a need to have an explicit test for this in csu.

MFC r280980:

2015-04-09T06:38:32Z

Ensure the cross assembler, linker and objcopy are used for the build32 stage, just like for the regular world stage. Reviewed by: rodrigc, imp, bapt, emaste Differential Revision: https://reviews.freebsd.org/D2187

Only assign the environ in the startup code when environ is NULL.

2013-01-07T17:58:27Z

Preloaded library could have changed the environment, and unconditional assingment to the environ undoes the customization. The binaries needs to be recompiled to get the fix. Move the common code to set up environ and __progname into the helper. Note that ia64 possibly not fixed, due to it still using old csu. Reported and tested by: John Hein Reviewed by: kan, scf Approved by: secteam (simon) MFC after: 2 weeks

After r217375, some startup objects under lib/csu are built in a special

2012-04-20T21:00:39Z

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 MFC after: 1 week

Stop calling _init/_fini methods from crt1 for dynamic binaries. Do

2012-03-11T20:04:09Z

call preinit, init and fini arrays methods from crt1 for static binaries. Mark new crt1 with FreeBSD-specific ELF note. Move some common crt1 code into new MI file ignore_init.c, to reduce duplication. Also, conservatively adjust nearby sources for style. Reviewed by: kan Tested by: andrew (arm), flo (sparc64) MFC after: 3 weeks

The (%esp & 0xf) == 0 should be true before the call instruction is

2011-01-13T23:00:22Z

executed, for the properly aligned stack. Reported and tested by: rstone Pointy hat to: kib MFC after: 3 days

Apply a workaround for a binutils issue with the .note.ABI-tag section

2011-01-13T20:44:31Z

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

Add section .note.GNU-stack for assembly files used by 386 and amd64.

2011-01-07T16:07:51Z