Hi,
This patchset further improves porting of nolibc to new architectures,
it is based on our previous v5 sysret helper series [1].
It mainly shrinks the assembly _start by moving most of its operations
to a C version of _start_c() function. and also, it removes the old
sys_stat() support by using the sys_statx() instead and therefore,
removes all of the arch specific sys_stat_struct.
Tested 'run' on all of the supported architectures:
arch/board | result
------------|------------
arm/vexpress-a9 | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/arm-vexpress-a9-nolibc-test.log
arm/virt | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/arm-virt-nolibc-test.log
aarch64/virt | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/aarch64-virt-nolibc-test.log
ppc/g3beige | not supported
ppc/ppce500 | not supported
i386/pc | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/i386-pc-nolibc-test.log
x86_64/pc | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/x86_64-pc-nolibc-test.log
mipsel/malta | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/mipsel-malta-nolibc-test.log
loongarch64/virt | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/loongarch64-virt-nolibc-test.log
riscv64/virt | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/riscv64-virt-nolibc-test.log
riscv32/virt | 119 test(s) passed, 1 skipped, 22 failed. See all results in /labs/linux-lab/logging/nolibc/riscv32-virt-nolibc-test.log
s390x/s390-ccw-virtio | 141 test(s) passed, 1 skipped, 0 failed. See all results in /labs/linux-lab/logging/nolibc/s390x-s390-ccw-virtio-nolibc-test.log
Notes:
- ppc support are ready locally, will be sent out later.
- full riscv32/virt support are ready locally, will be sent out later.
Changes:
* tools/nolibc: remove old arch specific stat support
Just like the __NR_statx we used in nolibc-test.c, Let's only
reserve sys_statx() and use it to implement the stat() function.
Remove the old sys_stat() and sys_stat_struct completely.
* tools/nolibc: add new crt.h with _start_c
A new C version of _start_c() is added to only require a 'sp' argument
and find the others (argc, argv, envp/environ, auxv) for us in C.
* tools/nolibc: include crt.h before arch.h
Include crt.h before arch.h to let _start() be able to call the new
added _start_c() in arch-<ARCH>.h.
* tools/nolibc: arm: shrink _start with _start_c
tools/nolibc: aarch64: shrink _start with _start_c
tools/nolibc: i386: shrink _start with _start_c
tools/nolibc: x86_64: shrink _start with _start_c
tools/nolibc: mips: shrink _start with _start_c
tools/nolibc: loongarch: shrink _start with _start_c
tools/nolibc: riscv: shrink _start with _start_c
tools/nolibc: s390: shrink _start with _start_c
Move most of the operations from the assembly _start() to the C
_start_c(), only require to do minimal operations in assembly _start
now.
With this patchset, porting nolibc to a new architecture become easier,
the powerpc porting will be added later.
Best regards,
Zhangjin
---
[1]: https://lore.kernel.org/lkml/cover.1687957589.git.falcon@xxxxxxxxxxx/
Zhangjin Wu (11):
tools/nolibc: remove old arch specific stat support
tools/nolibc: add new crt.h with _start_c
tools/nolibc: include crt.h before arch.h
tools/nolibc: arm: shrink _start with _start_c
tools/nolibc: aarch64: shrink _start with _start_c
tools/nolibc: i386: shrink _start with _start_c
tools/nolibc: x86_64: shrink _start with _start_c
tools/nolibc: mips: shrink _start with _start_c
tools/nolibc: loongarch: shrink _start with _start_c
tools/nolibc: riscv: shrink _start with _start_c
tools/nolibc: s390: shrink _start with _start_c
tools/include/nolibc/Makefile | 1 +
tools/include/nolibc/arch-aarch64.h | 53 ++----------------
tools/include/nolibc/arch-arm.h | 79 ++-------------------------
tools/include/nolibc/arch-i386.h | 58 +++-----------------
tools/include/nolibc/arch-loongarch.h | 42 ++------------
tools/include/nolibc/arch-mips.h | 73 +++----------------------
tools/include/nolibc/arch-riscv.h | 65 ++--------------------
tools/include/nolibc/arch-s390.h | 60 ++------------------
tools/include/nolibc/arch-x86_64.h | 54 ++----------------
tools/include/nolibc/crt.h | 57 +++++++++++++++++++
tools/include/nolibc/nolibc.h | 1 +
tools/include/nolibc/signal.h | 1 +
tools/include/nolibc/stdio.h | 1 +
tools/include/nolibc/stdlib.h | 1 +
tools/include/nolibc/sys.h | 64 ++++------------------
tools/include/nolibc/time.h | 1 +
tools/include/nolibc/types.h | 4 +-
tools/include/nolibc/unistd.h | 1 +
18 files changed, 122 insertions(+), 494 deletions(-)
create mode 100644 tools/include/nolibc/crt.h
--
2.25.1
