CVS commit: [netbsd-9] src

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Sun Aug  8 10:22:04 UTC 2021

Modified Files:
        src/lib/libc/arch/arm/gen [netbsd-9]: swapcontext.S
        src/lib/libc/arch/arm/sys [netbsd-9]: __clone.S
        src/sys/external/bsd/compiler_rt/dist/lib/builtins/arm [netbsd-9]:
            aeabi_cfcmp.S divmodsi4.S divsi3.S modsi3.S

Log Message:
Pull up following revision(s) (requested by skrll in ticket #1329):

        lib/libc/arch/arm/gen/swapcontext.S: revision 1.18
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divsi3.S: revision 1.2
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divsi3.S: revision 1.3
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/aeabi_cfcmp.S: revision 1.2
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/aeabi_cfcmp.S: revision 1.3
        lib/libc/arch/arm/sys/__clone.S: revision 1.10
        lib/libc/arch/arm/sys/__clone.S: revision 1.11
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/modsi3.S: revision 1.2
        lib/libc/arch/arm/sys/__clone.S: revision 1.12
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/modsi3.S: revision 1.3
        lib/libc/arch/arm/sys/__clone.S: revision 1.13
        lib/libc/arch/arm/sys/__clone.S: revision 1.14
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divmodsi4.S: revision 1.2
        sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divmodsi4.S: revision 1.3
        lib/libc/arch/arm/gen/swapcontext.S: revision 1.16
        lib/libc/arch/arm/gen/swapcontext.S: revision 1.17

Align sp to 8-byte boundary as required by EABI.

This is especially important for non-leaf functions; GCC optimizes codes
based on assumption that sp is aligned properly.

Mostly fix broken earmv5 userland compiled by GCC10 due to alignment
faults in ld.elf_so, where {ld,st}rd are used for [sp, #8x].

No regression for ATF is observed for earmv[67]{,hf}{,eb}.

Align sp to 8-byte boundary as required by EABI.
IIUC, this change only affects libc compiled for ``Thumb-mode userland'',
which we've not officially supported yet.

Fix previous. For Thumb-1:
- sp cannot be manipulated directly
- {add,sub}s should be used instead of {add,sub}

Trailing whitespace

The _INVOKE_CERROR macro deals with thumb so simplify the code (at the
expense of a couple more instructions).

Do previous differently by pushing even number of registers and remove
strange r7 usage.

Do previous differtly by pushing two registers in the same way as the
_INVOKE_CERROR macro


To generate a diff of this commit:
cvs rdiff -u -r1.15 -r1.15.2.1 src/lib/libc/arch/arm/gen/swapcontext.S
cvs rdiff -u -r1.9 -r1.9.28.1 src/lib/libc/arch/arm/sys/__clone.S
cvs rdiff -u -r1.1.1.1 -r1.1.1.1.26.1 \
    src/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/aeabi_cfcmp.S
cvs rdiff -u -r1.1.1.4 -r1.1.1.4.22.1 \
    src/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divmodsi4.S \
    src/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divsi3.S \
    src/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/modsi3.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.