devel November 2018

devel@uclibc-ng.org

3 participants
3 discussions

uclibc-ng-test and math complex functions
by Laurent Thévenoux 20 Dec '18

20 Dec '18

Hi, I'm trying to build uclibc-ng-test, but I can't link with complex trigo functions (such as cacos, casin, catan, etc.). They are required for the following test targets: test-double, test-double-finite, test-float, test-float-finite, test-idouble, and test-ifloat. They are declared in uclibc-ng/sysdeps/linux/common/bits/cmathcalls.h, but I can't find their definitions. Does uclibc-ng define them? Thanks, -- Laurent Thévenoux lthevenoux(a)kalray.eu Kalray S.A. 180 Avenue de l'Europe 38330 Montbonnot FRANCE

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[PATCH] Defined INLINE_SYSCALL_NOERR_NCS in mips/bits/syscalls.h
by Volodymyr Boyko 23 Nov '18

23 Nov '18

On Linux/MIPS (O32 ABI) for system call we have two result registers - v0 and a3. v0 contains actual syscall result on success or error number on fail, a3 set to 0/1 for indicating syscall success/fail. (if a3 == 1, v0 contains errno). Now as we can see from definition of handle_sys (arch/mips/kernel/scall32-o32.S), handler treats returned by syscall function (let's call "original") values in range [-EMAXERRNO; 0[ as -errno, a3 is set to 1 and final returned (to userspace) value is (-original). INLINE_SYSCALL_NOERR_NCS defined in mips/bits/syscalls.h will handle this behaviour. Signed-off-by: Volodymyr Boyko <boyko.cxx(a)gmail.com> --- libc/sysdeps/linux/mips/bits/syscalls.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/libc/sysdeps/linux/mips/bits/syscalls.h b/libc/sysdeps/linux/mips/bits/syscalls.h index 787bb7d..b8f8059 100644 --- a/libc/sysdeps/linux/mips/bits/syscalls.h +++ b/libc/sysdeps/linux/mips/bits/syscalls.h @@ -29,6 +29,16 @@ } \ result_var; }) +#define INLINE_SYSCALL_NOERR_NCS(name, nr, args...) \ +({ \ + INTERNAL_SYSCALL_DECL(err); \ + long res = INTERNAL_SYSCALL_NCS(name, err, nr, args); \ + if (unlikely(INTERNAL_SYSCALL_ERROR_P(res, err))) { \ + res = -res; \ + } \ + res; \ +}) + #define INTERNAL_SYSCALL_DECL(err) long err attribute_unused #define INTERNAL_SYSCALL_ERROR_P(val, err) ((long) (err)) -- 2.7.4

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uClibc-ng GitHub mirror
by Alexey Brodkin 21 Nov '18

21 Nov '18

Hi Waldemar, It looks like GitHub mirror is a bit out of sync with your main repo. See https://github.com/wbx-github/uclibc-ng/commits/master was last updated back in August. Also I noticed that the most recent version 1.0.31 is not listed in tags in the main repo: https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/refs/tags. -Alexey

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devel November 2018