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Date: Thu, 16 Nov 2023 17:44:20 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: Hongliang Wang <wanghongliang@...ngson.cn>
Cc: musl@...ts.openwall.com
Subject: Re: add loongarch64 port v9.
* Hongliang Wang <wanghongliang@...ngson.cn> [2023-11-16 10:54:44 +0800]:
> Thank you for your suggestion, I have modified the dynamic linker
> name according to the basic ABI types are specified in the ABI
> document of the LoongArch, and post 0001-add-loongarch64-port-v9.patch,
> as shown in the attachment.
>
> Based on 0001-add-loongarch64-port-v8.patch,the modifications for
> 0001-add-loongarch64-port-v9.patch are as follows:
note, the new names must match gcc, which seems to be the case:
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/loongarch/gnu-user.h;h=9616d6e8a0b8629720a844fd0122dafef682a4cb;hb=HEAD#l36
they do *not* match the names in the cited abi document:
https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_program_interpreter_path
(uses /lib64/..-loongarch-.. instead of /lib/..-loongarch64-..)
the diff looks good.
>
> ---
> arch/loongarch64/reloc.h | 10 ++++++----
> configure | 4 +++-
> 2 files changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/arch/loongarch64/reloc.h b/arch/loongarch64/reloc.h
> index a4482b48..6907de8e 100644
> --- a/arch/loongarch64/reloc.h
> +++ b/arch/loongarch64/reloc.h
> @@ -1,7 +1,9 @@
> -#ifdef __loongarch_soft_float
> -#define FP_SUFFIX "-sf"
> -#else
> -#define FP_SUFFIX ""
> +#if defined __loongarch_double_float
> +#define FP_SUFFIX "-lp64d"
> +#elif defined __loongarch_single_float
> +#define FP_SUFFIX "-lp64f"
> +#elif defined __loongarch_soft_float
> +#define FP_SUFFIX "-lp64s"
> #endif
>
> #define LDSO_ARCH "loongarch64" FP_SUFFIX
> diff --git a/configure b/configure
> index 55d179f1..93b06287 100755
> --- a/configure
> +++ b/configure
> @@ -673,7 +673,9 @@ trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be
> fi
>
> if test "$ARCH" = "loongarch64" ; then
> -trycppif __loongarch_soft_float "$t" && SUBARCH=${SUBARCH}-sf
> +trycppif __loongarch_double_float "$t" && SUBARCH=${SUBARCH}-lp64d
> +trycppif __loongarch_single_float "$t" && SUBARCH=${SUBARCH}-lp64f
> +trycppif __loongarch_soft_float "$t" && SUBARCH=${SUBARCH}-lp64s
> printf "checking whether compiler support FCSRs... "
> echo "__asm__(\"movfcsr2gr \$t0,\$fcsr0\");" > "$tmpc"
> if $CC -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
> --
>
> Please review again, and point them out if any questions need to be
> modified, thanks.
>
>
> Hongliang Wang
>
> 在 2023/11/14 下午9:16, Jingyun Hua 写道:
> > hi,
> >
> > I have a suggestion regarding the musl dynamic linker name for the
> > LoongArch architecture:
> >
> > The basic ABI types are specified in the ABI document of the LoongArch,
> > which can be seen:
> > https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html
> >
> > and the dynamic linker name of glibc distinguishes lp64d, lp64s and
> > lp64f with abi types.The v8 patch only defines the value of SUBARCH
> > as "-sf" for “__loongarch_soft_float”, which means that only
> > “ld-musl-loongarch64.so.1” or “ld-musl-loongarch64-sf.so.1” can be
> > generated when compiled with the v8 patch.
> >
> > So I think the musl dynamic linker name for the LoongArch architecture
> > needs to be modified, maybe defined like glibc?
> >
> > Regards,
> > Jingyun Hua
> >
> > On 11/9/23 9:15 PM, Jingyun Hua wrote:
> > > Hi all,
> > >
> > > Thank you for taking the time to check this email. I'm very interested
> > > in musl and alpine, and I'd like to know the current status of this
> > > patch and what we can do for it next.
> > >
> > > After Hongliang updated this patch from v7 to v8, in order to verify it,
> > > I built the alpine linux from scratch base on this musl v8 patch on the
> > > LoongArch64 machine, and successfully compiled projects such as gcc,
> > > rust, llvm, go, etc.. Currently, more than 8,500 packages have been
> > > built and running normally in my local repository.
> > >
> > > The patch has indeed been on hold for a long time. Is it in the
> > > immediate plans? Is there anything that needs to be modified and
> > > improved?
> > >
> > > Looking forward to your reply, thanks!
> > >
> > > Regards,
> > > Jingyun Hua
> > >
> > > 在 2023/9/26 上午11:28, Hongliang Wang 写道:
> > > > Hi,
> > > >
> > > > I have fixed the issues listed below, and post
> > > > 0001-add-loongarch64-port-v8.patch,as shown in the attachment.
> > > > please review again, if there are anything that need to be modified,
> > > > please point out, thank you.
> > > >
> > > > Hongliang Wang
> > > >
> > > > 在 2023/9/22 上午9:37, Hongliang Wang 写道:
> > > > > Hi,
> > > > >
> > > > > Thank you for your review, I will modify it according to the review
> > > > > suggestions and post v8 patch later.
> > > > >
> > > > > Hongliang Wang
> > > > >
> > > > > 在 2023/9/20 下午9:16, Szabolcs Nagy 写道:
> > > > > > * Jianmin Lv <lvjianmin@...ngson.cn> [2023-09-20 15:45:39 +0800]:
> > > > > > > Sorry to bother you, but I just want to know if
> > > > > > > there is any progress on
> > > > > > > this, because Alpine is blocking by this patch for a
> > > > > > > long time. As Hongliang
> > > > > > > has explained questions you mentioned one by one, if
> > > > > > > any question need to be
> > > > > > > discussed, please point them out, so that the patch
> > > > > > > can be handled further.
> > > > > >
> > > > > > i think you should post a v8 patch to move
> > > > > > this forward. (not on github, but here)
> > > > > >
> > > > > > > On 2023/8/15 下午4:17, Hongliang Wang wrote:
> > > > > > > > 在 2023/8/13 上午9:41, Rich Felker 写道:
> > > > > > > > > On Sat, Aug 05, 2023 at 11:43:08AM -0400, Rich Felker wrote:
> > > > > > > > > > On Sat, Aug 05, 2023 at 02:18:35PM +0800, 翟小娟 wrote:
> > > > > > > > > > -+#define __BYTE_ORDER 1234
> > > > > > > > > > ++#define __BYTE_ORDER __LITTLE_ENDIAN
> > > > > > > > >
> > > > > > > > > This is gratuitous, mismatches what is done on other archs, and is
> > > > > > > > > less safe.
> > > > > > > > >
> > > > > > > > The modification is based on the following review suggestion(
> > > > > > > > WANG Xuerui <i@...0n.name> reviewed in
> > > > > > > > https://www.openwall.com/lists/musl/2022/10/12/1):
> > > > > > > >
> > > > > > > > `#define __BYTE_ORDER __LITTLE_ENDIAN` could be more consistent
> > > > > > > > with other arches.
> > > > > >
> > > > > > please use 1234.
> > > >
> > > > --- a/arch/loongarch64/bits/alltypes.h.in
> > > > +++ b/arch/loongarch64/bits/alltypes.h.in
> > > > @@ -2,7 +2,7 @@
> > > > #define _Int64 long
> > > > #define _Reg long
> > > >
> > > > -#define __BYTE_ORDER __LITTLE_ENDIAN
> > > > +#define __BYTE_ORDER 1234
> > > > #define __LONG_MAX 0x7fffffffffffffffL
> > > >
> > > >
> > > > > >
> > > > > > > > > > -+TYPEDEF unsigned nlink_t;
> > > > > > > > > > ++TYPEDEF unsigned int nlink_t;
> > > > > > > > >
> > > > > > > > > Gratuitous and in opposite direction of
> > > > > > > > > coding style used elsewhere in
> > > > > > > > > musl. There are a few other instances of this too.
> > > > > > > > >
> > > > > > > > Based on the following review question(WANG Xuerui <i@...0n.name>
> > > > > > > > reviewed in https://www.openwall.com/lists/musl/2022/10/12/1):
> > > > > > > >
> > > > > > > > `unsigned int`? Same for other bare `unsigned` usages.
> > > > > > > >
> > > > > > > > I fixed it to a explicit definition.
> > > > > >
> > > > > > please use plain unsigned, not unsigned int.
> > > >
> > > > --- a/arch/loongarch64/bits/alltypes.h.in
> > > > +++ b/arch/loongarch64/bits/alltypes.h.in
> > > > @@ -2,7 +2,7 @@
> > > >
> > > > -TYPEDEF unsigned int nlink_t;
> > > > +TYPEDEF unsigned nlink_t;
> > > > TYPEDEF int blksize_t;
> > > >
> > > > > >
> > > > > > > > > > -+ register uintptr_t tp __asm__("tp");
> > > > > > > > > > -+ __asm__ ("" : "=r" (tp) );
> > > > > > > > > > ++ uintptr_t tp;
> > > > > > > > > > ++ __asm__ __volatile__("move %0, $tp" : "=r"(tp));
> > > > > > > > > > + return tp;
> > > > > > > > >
> > > > > > > > > Not clear what the motivation is here. Is it
> > > > > > > > > working around a compiler
> > > > > > > > > bug? The original form was more optimal.
> > > > > > > >
> > > > > > > > The modification is based on the following review suggestion(
> > > > > > > > WANG Xuerui <i@...0n.name> reviewed in
> > > > > > > > https://www.openwall.com/lists/musl/2022/10/12/1):
> > > > > > > >
> > > > > > > > While the current approach works, it's a bit fragile [1], and
> > > > > > > > the simple and plain riscv version works too:
> > > > > > > >
> > > > > > > > uintptr_t tp;
> > > > > > > > __asm__ ("move %0, $tp" : "=r"(tp));
> > > > > > > >
> > > > > > > > [1]:https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html#Local-Register-Variables
> > > > > > > >
> > > > > >
> > > > > > this looks ok to me.
> > > > > >
> > > > > > (original code looks sketchy to me.)
> > > > > >
> > > > > > > > > > +#define CRTJMP(pc,sp) __asm__ __volatile__( \
> > > > > > > > > > -+ "move $sp,%1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )
> > > > > > > > > > -+
> > > > > > > > > > -+#define GETFUNCSYM(fp, sym, got) __asm__ ( \
> > > > > > > > > > -+ ".hidden " #sym "\n" \
> > > > > > > > > > -+ ".align 8 \n" \
> > > > > > > > > > -+ " la.local $t1, "#sym" \n" \
> > > > > > > > > > -+ " move %0, $t1 \n" \
> > > > > > > > > > -+ : "=r"(*(fp)) : : "memory" )
> > > > > > > > > > ++ "move $sp, %1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )
> > > > > > > > >
> > > > > > > > > Not clear why this was changed. It was never
> > > > > > > > > discussed afaik. It looks
> > > > > > > > > somewhat dubious removing GETFUNCSYM and using the maybe-unreliable
> > > > > > > > > default definition.
> > > > > > > > >
> > > > > > > > Based on the following review question(
> > > > > > > > WANG Xuerui <i@...0n.name> reviewed
> > > > > > > > in https://www.openwall.com/lists/musl/2022/10/12/1):
> > > > > > > >
> > > > > > > > Does the generic version residing in ldso/dlstart.c not work?
> > > > > > > >
> > > > > > > > I found the code logic is consistent with the generic version, So
> > > > > > > > I removed the definition here and replaced it with generic version.
> > > > > >
> > > > > > i would change it back to the asm.
> > > > > >
> > > > > > generic version should work, but maybe we don't
> > > > > > want to trust the compiler here (there may be
> > > > > > ways to compile the generic code that is not
> > > > > > compatible with incompletely relocated libc.so)
> > > > > > the asm is safer.
> > > > > >
> > > > --- a/arch/loongarch64/reloc.h
> > > > +++ b/arch/loongarch64/reloc.h
> > > > @@ -18,3 +18,10 @@
> > > >
> > > > #define CRTJMP(pc,sp) __asm__ __volatile__( \
> > > > "move $sp, %1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )
> > > > +
> > > > +#define GETFUNCSYM(fp, sym, got) __asm__ ( \
> > > > + ".hidden " #sym "\n" \
> > > > + ".align 8 \n" \
> > > > + " la.local $t1, "#sym" \n" \
> > > > + " move %0, $t1 \n" \
> > > > + : "=r"(*(fp)) : : "memory" )
> > > >
> > > > > > > > > It also looks like v5->v6 rewrote sigsetjmp.
> > > > > > > > >
> > > > > > > > Based on the following review question(
> > > > > > > > WANG Xuerui <i@...0n.name> reviewed
> > > > > > > > in https://www.openwall.com/lists/musl/2022/10/12/1):
> > > > > > > >
> > > > > > > > This is crazy complicated compared to the riscv port, why is the
> > > > > > > > juggling between a0/a1 and t5/t6 necessary?
> > > > > > > >
> > > > > > > > I optimized the code implementations.
> > > > > >
> > > > > > this should be ok.
> > > > > >
> > > > > > > > > v6->v7:
> > > > > > > > >
> > > > > > > > > sigcontext/mcontext_t change mostly makes sense, but the
> > > > > > > > > namespace-safe and full mcontext_t differ in
> > > > > > > > > their use of the aligned
> > > > > > > > > attribute and it's not clear that the
> > > > > > > > > attribute is needed (since the
> > > > > > > > > offset is naturally aligned and any instance
> > > > > > > > > of the object is produced
> > > > > > > > > by the kernel, not by userspace).
> > > > > > > > >
> > > > > > > > > > -+ long __uc_pad;
> > > > > > > > >
> > > > > > > > > This change to ucontext_t actually makes the
> > > > > > > > > struct ABI-incompatible
> > > > > > > > > in the namespace-safe version without the
> > > > > > > > > alignment attribute. IIRC I
> > > > > > > > > explicitly requested the explicit padding
> > > > > > > > > field to avoid this kind of
> > > > > > > > > footgun. Removing it does not seem like a good idea.
> > > > > > > > >
> > > > > > > > Initially, we add __uc_pad to ensure uc_mcontext
> > > > > > > > is 16 byte alignment.
> > > > > > > > Now, we added __attribute__((__aligned__(16))) to
> > > > > > > > uc_mcontext.__extcontext[],this can ensure
> > > > > > > > uc_mcontext is also 16 byte
> > > > > > > > alignment. so __uc_pad is not used.
> > > > > > > >
> > > > > > > > Remove __uc_pad, from the point of struct
> > > > > > > > layout, musl and kernel are
> > > > > > > > consistent. otherwise, I think it may bring a sense of inconsistency
> > > > > > > > between kernel and musl. Due to Loongarch is not
> > > > > > > > merged into musl now,
> > > > > > > > Remove it no compatibility issues.
> > > > > >
> > > > > > please add back the padding field.
> > > >
> > > > --- a/arch/loongarch64/bits/signal.h
> > > > +++ b/arch/loongarch64/bits/signal.h
> > > > @@ -40,6 +40,7 @@ typedef struct __ucontext
> > > > struct __ucontext *uc_link;
> > > > stack_t uc_stack;
> > > > sigset_t uc_sigmask;
> > > > + long __uc_pad;
> > > > mcontext_t uc_mcontext;
> > > > } ucontext_t;
> > > >
> > > > > >
> > > > > > > > > In stat.h:
> > > > > > > > >
> > > > > > > > > > -+ unsigned long __pad;
> > > > > > > > > > ++ unsigned long __pad1;
> > > > > > > > >
> > > > > > > > > This is gratuitous and makes the definition
> > > > > > > > > gratuitously mismatch what
> > > > > > > > > will become the "generic" version of
> > > > > > > > > bits/stat.h. There is no contract
> > > > > > > > > for applications to be able to access these
> > > > > > > > > padding fields by name, so
> > > > > > > > > no motivation to make their names match
> > > > > > > > > glibc's names or the kernel's.
> > > > > > > > >
> > > > > > > > OK.
> > > > > >
> > > > > > please fix it.
> > > >
> > > > --- a/arch/loongarch64/bits/stat.h
> > > > +++ b/arch/loongarch64/bits/stat.h
> > > > @@ -6,7 +6,7 @@ struct stat {
> > > > uid_t st_uid;
> > > > gid_t st_gid;
> > > > dev_t st_rdev;
> > > > - unsigned long __pad1;
> > > > + unsigned long __pad;
> > > > off_t st_size;
> > > > blksize_t st_blksize;
> > > > int __pad2;
> > > >
> > > > > >
> > > > > > > > > In fenv.S:
> > > > > > > > >
> > > > > > > > > > ++#ifdef __clang__
> > > > > > > > > > ++#define FCSR $fcsr0
> > > > > > > > > > ++#else
> > > > > > > > > > ++#define FCSR $r0
> > > > > > > > > > ++#endif
> > > > > > > > >
> > > > > > > > > It's not clear to me what's going on here. Is there a clang
> > > > > > > > > incompatibility in the assembler language you're working around? Or
> > > > > > > > > what? If so that seems like a tooling bug that should be fixed.
> > > > > > > > >
> > > > > > > > The GNU assembler cannot correctly recognize $fcsr0, but the
> > > > > > > > LLVM IAS does not have this issue, so make a distinction.
> > > > > > > > This issue has been fixed in GNU assembler 2.41. but for compatible
> > > > > > > > with GNU assembler 2.40 and below, $r0 need reserved.
> > > > > >
> > > > > > it sounds like the correct asm is $fcsr0, so that's
> > > > > > what should be used on all assemblers, not just on
> > > > > > clang as.
> > > > > >
> > > > > > only broken old gnu as should use different syntax.
> > > > > > for this a configure test is needed that adds a
> > > > > > CFLAG like -DBROKEN_LOONGARCH_FCSR_ASM when fails.
> > > > > > and use that for the ifdef.
> > > > > >
> > > > --- a/configure
> > > > +++ b/configure
> > > >
> > > > if test "$ARCH" = "loongarch64" ; then
> > > > trycppif __loongarch_soft_float "$t" && SUBARCH=${SUBARCH}-sf
> > > > +printf "checking whether compiler support FCSRs... "
> > > > +echo "__asm__(\"movfcsr2gr \$t0,\$fcsr0\");" > "$tmpc"
> > > > +if $CC -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
> > > > +printf "yes\n"
> > > > +else
> > > > +printf "no\n"
> > > > +CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_LOONGARCH_FCSR_ASM"
> > > > +fi
> > > > fi
> > > >
> > > > --- a/src/fenv/loongarch64/fenv.S
> > > > +++ b/src/fenv/loongarch64/fenv.S
> > > > @@ -1,9 +1,9 @@
> > > > #ifndef __loongarch_soft_float
> > > >
> > > > -#ifdef __clang__
> > > > -#define FCSR $fcsr0
> > > > -#else
> > > > +#ifdef BROKEN_LOONGARCH_FCSR_ASM
> > > > #define FCSR $r0
> > > > +#else
> > > > +#define FCSR $fcsr0
> > > > #endif
> > > >
> > > > .global feclearexcept
> > > >
> > > > > > > >
> > > > > > > > The linux kernel also has a similar distinction:
> > > > > > > >
> > > > > > > > commit 38bb46f94544c5385bc35aa2bfc776dcf53a7b5d
> > > > > > > > Author: WANG Xuerui <git@...0n.name>
> > > > > > > > Date: Thu Jun 29 20:58:43 2023 +0800
> > > > > > > >
> > > > > > > > LoongArch: Prepare for assemblers with
> > > > > > > > proper FCSR class support
> > > > > > > >
> > > > > > > > The GNU assembler (as of 2.40) mis-treats
> > > > > > > > FCSR operands as GPRs, but
> > > > > > > > the LLVM IAS does not. Probe for this and
> > > > > > > > refer to FCSRs as"$fcsrNN"
> > > > > > > > if support is present.
> > > > > > > >
> > > > > > > > Signed-off-by: WANG Xuerui <git@...0n.name>
> > > > > > > > Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
> > > > > > > >
> > > > > > > > > Otherwise, everything looks as expected, I
> > > > > > > > > think. I'm okay with making
> > > > > > > > > any fixups for merging rather than throwing
> > > > > > > > > this back on your team for
> > > > > > > > > more revisions, but can you please follow up and clarify the above?
> > > > > >
> > > > > > all issues look minor.
> > > > > >
> > > > > > if you post a v8 it likely gets into a release faster.
> > > > > >
> > >
> >
> >From 2d5f9717fda5c16f10d805ce8a26f1e78de440ea Mon Sep 17 00:00:00 2001
> From: wanghongliang <wanghongliang@...ngson.cn>
> Date: Wed, 15 Nov 2023 01:31:51 +0800
> Subject: [PATCH] add loongarch64 port v9.
>
> Author: Xiaojuan Zhai <zhaixiaojuan@...ngson.cn>
> Author: Meidan Li <limeidan@...ngson.cn>
> Author: Guoqi Chen <chenguoqi@...ngson.cn>
> Author: Xiaolin Zhao <zhaoxiaolin@...ngson.cn>
> Author: Fan peng <fanpeng@...ngson.cn>
> Author: Jiantao Shan <shanjiantao@...ngson.cn>
> Author: Xuhui Qiang <qiangxuhui@...ngson.cn>
> Author: Jingyun Hua <huajingyun@...ngson.cn>
> Author: Liu xue <liuxue@...ngson.cn>
> Author: Hongliang Wang <wanghongliang@...ngson.cn>
>
> Signed-off-by: wanghongliang <wanghongliang@...ngson.cn>
> ---
> arch/loongarch64/atomic_arch.h | 53 ++++
> arch/loongarch64/bits/alltypes.h.in | 18 ++
> arch/loongarch64/bits/fenv.h | 20 ++
> arch/loongarch64/bits/float.h | 16 ++
> arch/loongarch64/bits/posix.h | 2 +
> arch/loongarch64/bits/ptrace.h | 4 +
> arch/loongarch64/bits/reg.h | 2 +
> arch/loongarch64/bits/setjmp.h | 1 +
> arch/loongarch64/bits/signal.h | 92 +++++++
> arch/loongarch64/bits/stat.h | 18 ++
> arch/loongarch64/bits/stdint.h | 20 ++
> arch/loongarch64/bits/syscall.h.in | 303 +++++++++++++++++++++
> arch/loongarch64/bits/user.h | 5 +
> arch/loongarch64/crt_arch.h | 13 +
> arch/loongarch64/pthread_arch.h | 11 +
> arch/loongarch64/reloc.h | 29 ++
> arch/loongarch64/syscall_arch.h | 137 ++++++++++
> configure | 15 +
> include/elf.h | 104 ++++++-
> src/fenv/loongarch64/fenv.S | 78 ++++++
> src/ldso/loongarch64/dlsym.s | 7 +
> src/setjmp/loongarch64/longjmp.S | 32 +++
> src/setjmp/loongarch64/setjmp.S | 34 +++
> src/signal/loongarch64/restore.s | 10 +
> src/signal/loongarch64/sigsetjmp.s | 25 ++
> src/thread/loongarch64/__set_thread_area.s | 7 +
> src/thread/loongarch64/__unmapself.s | 7 +
> src/thread/loongarch64/clone.s | 28 ++
> src/thread/loongarch64/syscall_cp.s | 29 ++
> 29 files changed, 1119 insertions(+), 1 deletion(-)
> create mode 100644 arch/loongarch64/atomic_arch.h
> create mode 100644 arch/loongarch64/bits/alltypes.h.in
> create mode 100644 arch/loongarch64/bits/fenv.h
> create mode 100644 arch/loongarch64/bits/float.h
> create mode 100644 arch/loongarch64/bits/posix.h
> create mode 100644 arch/loongarch64/bits/ptrace.h
> create mode 100644 arch/loongarch64/bits/reg.h
> create mode 100644 arch/loongarch64/bits/setjmp.h
> create mode 100644 arch/loongarch64/bits/signal.h
> create mode 100644 arch/loongarch64/bits/stat.h
> create mode 100644 arch/loongarch64/bits/stdint.h
> create mode 100644 arch/loongarch64/bits/syscall.h.in
> create mode 100644 arch/loongarch64/bits/user.h
> create mode 100644 arch/loongarch64/crt_arch.h
> create mode 100644 arch/loongarch64/pthread_arch.h
> create mode 100644 arch/loongarch64/reloc.h
> create mode 100644 arch/loongarch64/syscall_arch.h
> create mode 100644 src/fenv/loongarch64/fenv.S
> create mode 100644 src/ldso/loongarch64/dlsym.s
> create mode 100644 src/setjmp/loongarch64/longjmp.S
> create mode 100644 src/setjmp/loongarch64/setjmp.S
> create mode 100644 src/signal/loongarch64/restore.s
> create mode 100644 src/signal/loongarch64/sigsetjmp.s
> create mode 100644 src/thread/loongarch64/__set_thread_area.s
> create mode 100644 src/thread/loongarch64/__unmapself.s
> create mode 100644 src/thread/loongarch64/clone.s
> create mode 100644 src/thread/loongarch64/syscall_cp.s
>
> diff --git a/arch/loongarch64/atomic_arch.h b/arch/loongarch64/atomic_arch.h
> new file mode 100644
> index 00000000..2225d027
> --- /dev/null
> +++ b/arch/loongarch64/atomic_arch.h
> @@ -0,0 +1,53 @@
> +#define a_ll a_ll
> +static inline int a_ll(volatile int *p)
> +{
> + int v;
> + __asm__ __volatile__ (
> + "ll.w %0, %1"
> + : "=r"(v)
> + : "ZC"(*p));
> + return v;
> +}
> +
> +#define a_sc a_sc
> +static inline int a_sc(volatile int *p, int v)
> +{
> + int r;
> + __asm__ __volatile__ (
> + "sc.w %0, %1"
> + : "=r"(r), "=ZC"(*p)
> + : "0"(v) : "memory");
> + return r;
> +}
> +
> +#define a_ll_p a_ll_p
> +static inline void *a_ll_p(volatile void *p)
> +{
> + void *v;
> + __asm__ __volatile__ (
> + "ll.d %0, %1"
> + : "=r"(v)
> + : "ZC"(*(void *volatile *)p));
> + return v;
> +}
> +
> +#define a_sc_p a_sc_p
> +static inline int a_sc_p(volatile void *p, void *v)
> +{
> + long r;
> + __asm__ __volatile__ (
> + "sc.d %0, %1"
> + : "=r"(r), "=ZC"(*(void *volatile *)p)
> + : "0"(v)
> + : "memory");
> + return r;
> +}
> +
> +#define a_barrier a_barrier
> +static inline void a_barrier()
> +{
> + __asm__ __volatile__ ("dbar 0" : : : "memory");
> +}
> +
> +#define a_pre_llsc a_barrier
> +#define a_post_llsc a_barrier
> diff --git a/arch/loongarch64/bits/alltypes.h.in b/arch/loongarch64/bits/alltypes.h.in
> new file mode 100644
> index 00000000..06db4096
> --- /dev/null
> +++ b/arch/loongarch64/bits/alltypes.h.in
> @@ -0,0 +1,18 @@
> +#define _Addr long
> +#define _Int64 long
> +#define _Reg long
> +
> +#define __BYTE_ORDER 1234
> +#define __LONG_MAX 0x7fffffffffffffffL
> +
> +#ifndef __cplusplus
> +TYPEDEF int wchar_t;
> +#endif
> +
> +TYPEDEF float float_t;
> +TYPEDEF double double_t;
> +
> +TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
> +
> +TYPEDEF unsigned nlink_t;
> +TYPEDEF int blksize_t;
> diff --git a/arch/loongarch64/bits/fenv.h b/arch/loongarch64/bits/fenv.h
> new file mode 100644
> index 00000000..99e916e1
> --- /dev/null
> +++ b/arch/loongarch64/bits/fenv.h
> @@ -0,0 +1,20 @@
> +#define FE_INEXACT 0x010000
> +#define FE_UNDERFLOW 0x020000
> +#define FE_OVERFLOW 0x040000
> +#define FE_DIVBYZERO 0x080000
> +#define FE_INVALID 0x100000
> +
> +#define FE_ALL_EXCEPT 0x1F0000
> +
> +#define FE_TONEAREST 0x000
> +#define FE_TOWARDZERO 0x100
> +#define FE_UPWARD 0x200
> +#define FE_DOWNWARD 0x300
> +
> +typedef unsigned fexcept_t;
> +
> +typedef struct {
> + unsigned int __cw;
> +} fenv_t;
> +
> +#define FE_DFL_ENV ((const fenv_t *) -1)
> diff --git a/arch/loongarch64/bits/float.h b/arch/loongarch64/bits/float.h
> new file mode 100644
> index 00000000..63e86d44
> --- /dev/null
> +++ b/arch/loongarch64/bits/float.h
> @@ -0,0 +1,16 @@
> +#define FLT_EVAL_METHOD 0
> +
> +#define LDBL_TRUE_MIN 6.47517511943802511092443895822764655e-4966L
> +#define LDBL_MIN 3.36210314311209350626267781732175260e-4932L
> +#define LDBL_MAX 1.18973149535723176508575932662800702e+4932L
> +#define LDBL_EPSILON 1.92592994438723585305597794258492732e-34L
> +
> +#define LDBL_MANT_DIG 113
> +#define LDBL_MIN_EXP (-16381)
> +#define LDBL_MAX_EXP 16384
> +
> +#define LDBL_DIG 33
> +#define LDBL_MIN_10_EXP (-4931)
> +#define LDBL_MAX_10_EXP 4932
> +
> +#define DECIMAL_DIG 36
> diff --git a/arch/loongarch64/bits/posix.h b/arch/loongarch64/bits/posix.h
> new file mode 100644
> index 00000000..c37b94c1
> --- /dev/null
> +++ b/arch/loongarch64/bits/posix.h
> @@ -0,0 +1,2 @@
> +#define _POSIX_V6_LP64_OFF64 1
> +#define _POSIX_V7_LP64_OFF64 1
> diff --git a/arch/loongarch64/bits/ptrace.h b/arch/loongarch64/bits/ptrace.h
> new file mode 100644
> index 00000000..dce2fa51
> --- /dev/null
> +++ b/arch/loongarch64/bits/ptrace.h
> @@ -0,0 +1,4 @@
> +#define PTRACE_GET_THREAD_AREA 25
> +#define PTRACE_SET_THREAD_AREA 26
> +#define PTRACE_GET_WATCH_REGS 0xd0
> +#define PTRACE_SET_WATCH_REGS 0xd1
> diff --git a/arch/loongarch64/bits/reg.h b/arch/loongarch64/bits/reg.h
> new file mode 100644
> index 00000000..2633f39d
> --- /dev/null
> +++ b/arch/loongarch64/bits/reg.h
> @@ -0,0 +1,2 @@
> +#undef __WORDSIZE
> +#define __WORDSIZE 64
> diff --git a/arch/loongarch64/bits/setjmp.h b/arch/loongarch64/bits/setjmp.h
> new file mode 100644
> index 00000000..4bfa374d
> --- /dev/null
> +++ b/arch/loongarch64/bits/setjmp.h
> @@ -0,0 +1 @@
> +typedef unsigned long __jmp_buf[23];
> diff --git a/arch/loongarch64/bits/signal.h b/arch/loongarch64/bits/signal.h
> new file mode 100644
> index 00000000..e1d256e7
> --- /dev/null
> +++ b/arch/loongarch64/bits/signal.h
> @@ -0,0 +1,92 @@
> +#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
> + || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
> +
> +#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
> +#define MINSIGSTKSZ 4096
> +#define SIGSTKSZ 16384
> +#endif
> +
> +#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
> +typedef unsigned long greg_t, gregset_t[32];
> +
> +struct sigcontext {
> + unsigned long sc_pc;
> + unsigned long sc_regs[32];
> + unsigned int sc_flags;
> + unsigned long sc_extcontext[] __attribute__((__aligned__(16)));
> +};
> +
> +typedef struct {
> + unsigned long __pc;
> + unsigned long __gregs[32];
> + unsigned int __flags;
> + unsigned long __extcontext[] __attribute__((__aligned__(16)));
> +} mcontext_t;
> +#else
> +typedef struct {
> + unsigned long __space[34];
> +} mcontext_t;
> +#endif
> +
> +struct sigaltstack {
> + void *ss_sp;
> + int ss_flags;
> + size_t ss_size;
> +};
> +
> +typedef struct __ucontext
> +{
> + unsigned long __uc_flags;
> + struct __ucontext *uc_link;
> + stack_t uc_stack;
> + sigset_t uc_sigmask;
> + long __uc_pad;
> + mcontext_t uc_mcontext;
> +} ucontext_t;
> +
> +#define SA_NOCLDSTOP 1
> +#define SA_NOCLDWAIT 2
> +#define SA_SIGINFO 4
> +#define SA_ONSTACK 0x08000000
> +#define SA_RESTART 0x10000000
> +#define SA_NODEFER 0x40000000
> +#define SA_RESETHAND 0x80000000
> +#define SA_RESTORER 0x0
> +
> +#endif
> +
> +#define SIGHUP 1
> +#define SIGINT 2
> +#define SIGQUIT 3
> +#define SIGILL 4
> +#define SIGTRAP 5
> +#define SIGABRT 6
> +#define SIGIOT SIGABRT
> +#define SIGBUS 7
> +#define SIGFPE 8
> +#define SIGKILL 9
> +#define SIGUSR1 10
> +#define SIGSEGV 11
> +#define SIGUSR2 12
> +#define SIGPIPE 13
> +#define SIGALRM 14
> +#define SIGTERM 15
> +#define SIGSTKFLT 16
> +#define SIGCHLD 17
> +#define SIGCONT 18
> +#define SIGSTOP 19
> +#define SIGTSTP 20
> +#define SIGTTIN 21
> +#define SIGTTOU 22
> +#define SIGURG 23
> +#define SIGXCPU 24
> +#define SIGXFSZ 25
> +#define SIGVTALRM 26
> +#define SIGPROF 27
> +#define SIGWINCH 28
> +#define SIGIO 29
> +#define SIGPOLL SIGIO
> +#define SIGPWR 30
> +#define SIGSYS 31
> +#define SIGUNUSED SIGSYS
> +#define _NSIG 65
> diff --git a/arch/loongarch64/bits/stat.h b/arch/loongarch64/bits/stat.h
> new file mode 100644
> index 00000000..b7f4221b
> --- /dev/null
> +++ b/arch/loongarch64/bits/stat.h
> @@ -0,0 +1,18 @@
> +struct stat {
> + dev_t st_dev;
> + ino_t st_ino;
> + mode_t st_mode;
> + nlink_t st_nlink;
> + uid_t st_uid;
> + gid_t st_gid;
> + dev_t st_rdev;
> + unsigned long __pad;
> + off_t st_size;
> + blksize_t st_blksize;
> + int __pad2;
> + blkcnt_t st_blocks;
> + struct timespec st_atim;
> + struct timespec st_mtim;
> + struct timespec st_ctim;
> + unsigned __unused[2];
> +};
> diff --git a/arch/loongarch64/bits/stdint.h b/arch/loongarch64/bits/stdint.h
> new file mode 100644
> index 00000000..60c12499
> --- /dev/null
> +++ b/arch/loongarch64/bits/stdint.h
> @@ -0,0 +1,20 @@
> +typedef int32_t int_fast16_t;
> +typedef int32_t int_fast32_t;
> +typedef uint32_t uint_fast16_t;
> +typedef uint32_t uint_fast32_t;
> +
> +#define INT_FAST16_MIN INT32_MIN
> +#define INT_FAST32_MIN INT32_MIN
> +
> +#define INT_FAST16_MAX INT32_MAX
> +#define INT_FAST32_MAX INT32_MAX
> +
> +#define UINT_FAST16_MAX UINT32_MAX
> +#define UINT_FAST32_MAX UINT32_MAX
> +
> +#define INTPTR_MIN INT64_MIN
> +#define INTPTR_MAX INT64_MAX
> +#define UINTPTR_MAX UINT64_MAX
> +#define PTRDIFF_MIN INT64_MIN
> +#define PTRDIFF_MAX INT64_MAX
> +#define SIZE_MAX UINT64_MAX
> diff --git a/arch/loongarch64/bits/syscall.h.in b/arch/loongarch64/bits/syscall.h.in
> new file mode 100644
> index 00000000..0980e533
> --- /dev/null
> +++ b/arch/loongarch64/bits/syscall.h.in
> @@ -0,0 +1,303 @@
> +#define __NR_io_setup 0
> +#define __NR_io_destroy 1
> +#define __NR_io_submit 2
> +#define __NR_io_cancel 3
> +#define __NR_io_getevents 4
> +#define __NR_setxattr 5
> +#define __NR_lsetxattr 6
> +#define __NR_fsetxattr 7
> +#define __NR_getxattr 8
> +#define __NR_lgetxattr 9
> +#define __NR_fgetxattr 10
> +#define __NR_listxattr 11
> +#define __NR_llistxattr 12
> +#define __NR_flistxattr 13
> +#define __NR_removexattr 14
> +#define __NR_lremovexattr 15
> +#define __NR_fremovexattr 16
> +#define __NR_getcwd 17
> +#define __NR_lookup_dcookie 18
> +#define __NR_eventfd2 19
> +#define __NR_epoll_create1 20
> +#define __NR_epoll_ctl 21
> +#define __NR_epoll_pwait 22
> +#define __NR_dup 23
> +#define __NR_dup3 24
> +#define __NR3264_fcntl 25
> +#define __NR_inotify_init1 26
> +#define __NR_inotify_add_watch 27
> +#define __NR_inotify_rm_watch 28
> +#define __NR_ioctl 29
> +#define __NR_ioprio_set 30
> +#define __NR_ioprio_get 31
> +#define __NR_flock 32
> +#define __NR_mknodat 33
> +#define __NR_mkdirat 34
> +#define __NR_unlinkat 35
> +#define __NR_symlinkat 36
> +#define __NR_linkat 37
> +#define __NR_umount2 39
> +#define __NR_mount 40
> +#define __NR_pivot_root 41
> +#define __NR_nfsservctl 42
> +#define __NR3264_statfs 43
> +#define __NR3264_fstatfs 44
> +#define __NR3264_truncate 45
> +#define __NR3264_ftruncate 46
> +#define __NR_fallocate 47
> +#define __NR_faccessat 48
> +#define __NR_chdir 49
> +#define __NR_fchdir 50
> +#define __NR_chroot 51
> +#define __NR_fchmod 52
> +#define __NR_fchmodat 53
> +#define __NR_fchownat 54
> +#define __NR_fchown 55
> +#define __NR_openat 56
> +#define __NR_close 57
> +#define __NR_vhangup 58
> +#define __NR_pipe2 59
> +#define __NR_quotactl 60
> +#define __NR_getdents64 61
> +#define __NR3264_lseek 62
> +#define __NR_read 63
> +#define __NR_write 64
> +#define __NR_readv 65
> +#define __NR_writev 66
> +#define __NR_pread64 67
> +#define __NR_pwrite64 68
> +#define __NR_preadv 69
> +#define __NR_pwritev 70
> +#define __NR3264_sendfile 71
> +#define __NR_pselect6 72
> +#define __NR_ppoll 73
> +#define __NR_signalfd4 74
> +#define __NR_vmsplice 75
> +#define __NR_splice 76
> +#define __NR_tee 77
> +#define __NR_readlinkat 78
> +#define __NR_sync 81
> +#define __NR_fsync 82
> +#define __NR_fdatasync 83
> +#define __NR_sync_file_range 84
> +#define __NR_timerfd_create 85
> +#define __NR_timerfd_settime 86
> +#define __NR_timerfd_gettime 87
> +#define __NR_utimensat 88
> +#define __NR_acct 89
> +#define __NR_capget 90
> +#define __NR_capset 91
> +#define __NR_personality 92
> +#define __NR_exit 93
> +#define __NR_exit_group 94
> +#define __NR_waitid 95
> +#define __NR_set_tid_address 96
> +#define __NR_unshare 97
> +#define __NR_futex 98
> +#define __NR_set_robust_list 99
> +#define __NR_get_robust_list 100
> +#define __NR_nanosleep 101
> +#define __NR_getitimer 102
> +#define __NR_setitimer 103
> +#define __NR_kexec_load 104
> +#define __NR_init_module 105
> +#define __NR_delete_module 106
> +#define __NR_timer_create 107
> +#define __NR_timer_gettime 108
> +#define __NR_timer_getoverrun 109
> +#define __NR_timer_settime 110
> +#define __NR_timer_delete 111
> +#define __NR_clock_settime 112
> +#define __NR_clock_gettime 113
> +#define __NR_clock_getres 114
> +#define __NR_clock_nanosleep 115
> +#define __NR_syslog 116
> +#define __NR_ptrace 117
> +#define __NR_sched_setparam 118
> +#define __NR_sched_setscheduler 119
> +#define __NR_sched_getscheduler 120
> +#define __NR_sched_getparam 121
> +#define __NR_sched_setaffinity 122
> +#define __NR_sched_getaffinity 123
> +#define __NR_sched_yield 124
> +#define __NR_sched_get_priority_max 125
> +#define __NR_sched_get_priority_min 126
> +#define __NR_sched_rr_get_interval 127
> +#define __NR_restart_syscall 128
> +#define __NR_kill 129
> +#define __NR_tkill 130
> +#define __NR_tgkill 131
> +#define __NR_sigaltstack 132
> +#define __NR_rt_sigsuspend 133
> +#define __NR_rt_sigaction 134
> +#define __NR_rt_sigprocmask 135
> +#define __NR_rt_sigpending 136
> +#define __NR_rt_sigtimedwait 137
> +#define __NR_rt_sigqueueinfo 138
> +#define __NR_rt_sigreturn 139
> +#define __NR_setpriority 140
> +#define __NR_getpriority 141
> +#define __NR_reboot 142
> +#define __NR_setregid 143
> +#define __NR_setgid 144
> +#define __NR_setreuid 145
> +#define __NR_setuid 146
> +#define __NR_setresuid 147
> +#define __NR_getresuid 148
> +#define __NR_setresgid 149
> +#define __NR_getresgid 150
> +#define __NR_setfsuid 151
> +#define __NR_setfsgid 152
> +#define __NR_times 153
> +#define __NR_setpgid 154
> +#define __NR_getpgid 155
> +#define __NR_getsid 156
> +#define __NR_setsid 157
> +#define __NR_getgroups 158
> +#define __NR_setgroups 159
> +#define __NR_uname 160
> +#define __NR_sethostname 161
> +#define __NR_setdomainname 162
> +#define __NR_getrlimit 163
> +#define __NR_setrlimit 164
> +#define __NR_getrusage 165
> +#define __NR_umask 166
> +#define __NR_prctl 167
> +#define __NR_getcpu 168
> +#define __NR_gettimeofday 169
> +#define __NR_settimeofday 170
> +#define __NR_adjtimex 171
> +#define __NR_getpid 172
> +#define __NR_getppid 173
> +#define __NR_getuid 174
> +#define __NR_geteuid 175
> +#define __NR_getgid 176
> +#define __NR_getegid 177
> +#define __NR_gettid 178
> +#define __NR_sysinfo 179
> +#define __NR_mq_open 180
> +#define __NR_mq_unlink 181
> +#define __NR_mq_timedsend 182
> +#define __NR_mq_timedreceive 183
> +#define __NR_mq_notify 184
> +#define __NR_mq_getsetattr 185
> +#define __NR_msgget 186
> +#define __NR_msgctl 187
> +#define __NR_msgrcv 188
> +#define __NR_msgsnd 189
> +#define __NR_semget 190
> +#define __NR_semctl 191
> +#define __NR_semtimedop 192
> +#define __NR_semop 193
> +#define __NR_shmget 194
> +#define __NR_shmctl 195
> +#define __NR_shmat 196
> +#define __NR_shmdt 197
> +#define __NR_socket 198
> +#define __NR_socketpair 199
> +#define __NR_bind 200
> +#define __NR_listen 201
> +#define __NR_accept 202
> +#define __NR_connect 203
> +#define __NR_getsockname 204
> +#define __NR_getpeername 205
> +#define __NR_sendto 206
> +#define __NR_recvfrom 207
> +#define __NR_setsockopt 208
> +#define __NR_getsockopt 209
> +#define __NR_shutdown 210
> +#define __NR_sendmsg 211
> +#define __NR_recvmsg 212
> +#define __NR_readahead 213
> +#define __NR_brk 214
> +#define __NR_munmap 215
> +#define __NR_mremap 216
> +#define __NR_add_key 217
> +#define __NR_request_key 218
> +#define __NR_keyctl 219
> +#define __NR_clone 220
> +#define __NR_execve 221
> +#define __NR3264_mmap 222
> +#define __NR3264_fadvise64 223
> +#define __NR_swapon 224
> +#define __NR_swapoff 225
> +#define __NR_mprotect 226
> +#define __NR_msync 227
> +#define __NR_mlock 228
> +#define __NR_munlock 229
> +#define __NR_mlockall 230
> +#define __NR_munlockall 231
> +#define __NR_mincore 232
> +#define __NR_madvise 233
> +#define __NR_remap_file_pages 234
> +#define __NR_mbind 235
> +#define __NR_get_mempolicy 236
> +#define __NR_set_mempolicy 237
> +#define __NR_migrate_pages 238
> +#define __NR_move_pages 239
> +#define __NR_rt_tgsigqueueinfo 240
> +#define __NR_perf_event_open 241
> +#define __NR_accept4 242
> +#define __NR_recvmmsg 243
> +#define __NR_arch_specific_syscall 244
> +#define __NR_wait4 260
> +#define __NR_prlimit64 261
> +#define __NR_fanotify_init 262
> +#define __NR_fanotify_mark 263
> +#define __NR_name_to_handle_at 264
> +#define __NR_open_by_handle_at 265
> +#define __NR_clock_adjtime 266
> +#define __NR_syncfs 267
> +#define __NR_setns 268
> +#define __NR_sendmmsg 269
> +#define __NR_process_vm_readv 270
> +#define __NR_process_vm_writev 271
> +#define __NR_kcmp 272
> +#define __NR_finit_module 273
> +#define __NR_sched_setattr 274
> +#define __NR_sched_getattr 275
> +#define __NR_renameat2 276
> +#define __NR_seccomp 277
> +#define __NR_getrandom 278
> +#define __NR_memfd_create 279
> +#define __NR_bpf 280
> +#define __NR_execveat 281
> +#define __NR_userfaultfd 282
> +#define __NR_membarrier 283
> +#define __NR_mlock2 284
> +#define __NR_copy_file_range 285
> +#define __NR_preadv2 286
> +#define __NR_pwritev2 287
> +#define __NR_pkey_mprotect 288
> +#define __NR_pkey_alloc 289
> +#define __NR_pkey_free 290
> +#define __NR_statx 291
> +#define __NR_io_pgetevents 292
> +#define __NR_rseq 293
> +#define __NR_kexec_file_load 294
> +#define __NR_pidfd_send_signal 424
> +#define __NR_io_uring_setup 425
> +#define __NR_io_uring_enter 426
> +#define __NR_io_uring_register 427
> +#define __NR_open_tree 428
> +#define __NR_move_mount 429
> +#define __NR_fsopen 430
> +#define __NR_fsconfig 431
> +#define __NR_fsmount 432
> +#define __NR_fspick 433
> +#define __NR_pidfd_open 434
> +#define __NR_clone3 435
> +#define __NR_close_range 436
> +#define __NR_openat2 437
> +#define __NR_pidfd_getfd 438
> +#define __NR_faccessat2 439
> +#define __NR_process_madvise 440
> +#define __NR_fcntl __NR3264_fcntl
> +#define __NR_statfs __NR3264_statfs
> +#define __NR_fstatfs __NR3264_fstatfs
> +#define __NR_truncate __NR3264_truncate
> +#define __NR_ftruncate __NR3264_ftruncate
> +#define __NR_lseek __NR3264_lseek
> +#define __NR_sendfile __NR3264_sendfile
> +#define __NR_mmap __NR3264_mmap
> +#define __NR_fadvise64 __NR3264_fadvise64
> diff --git a/arch/loongarch64/bits/user.h b/arch/loongarch64/bits/user.h
> new file mode 100644
> index 00000000..5a71d132
> --- /dev/null
> +++ b/arch/loongarch64/bits/user.h
> @@ -0,0 +1,5 @@
> +#define ELF_NGREG 45
> +#define ELF_NFPREG 33
> +
> +typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
> +typedef double elf_fpreg_t, elf_fpregset_t[ELF_NFPREG];
> diff --git a/arch/loongarch64/crt_arch.h b/arch/loongarch64/crt_arch.h
> new file mode 100644
> index 00000000..e0760d9e
> --- /dev/null
> +++ b/arch/loongarch64/crt_arch.h
> @@ -0,0 +1,13 @@
> +__asm__(
> +".text \n"
> +".global " START "\n"
> +".type " START ", @function\n"
> +START ":\n"
> +" move $fp, $zero\n"
> +" move $a0, $sp\n"
> +".weak _DYNAMIC\n"
> +".hidden _DYNAMIC\n"
> +" la.local $a1, _DYNAMIC\n"
> +" bstrins.d $sp, $zero, 3, 0\n"
> +" b " START "_c\n"
> +);
> diff --git a/arch/loongarch64/pthread_arch.h b/arch/loongarch64/pthread_arch.h
> new file mode 100644
> index 00000000..28fbfcd1
> --- /dev/null
> +++ b/arch/loongarch64/pthread_arch.h
> @@ -0,0 +1,11 @@
> +static inline uintptr_t __get_tp()
> +{
> + uintptr_t tp;
> + __asm__ __volatile__("move %0, $tp" : "=r"(tp));
> + return tp;
> +}
> +
> +#define TLS_ABOVE_TP
> +#define GAP_ABOVE_TP 0
> +#define DTP_OFFSET 0
> +#define MC_PC __pc
> diff --git a/arch/loongarch64/reloc.h b/arch/loongarch64/reloc.h
> new file mode 100644
> index 00000000..6907de8e
> --- /dev/null
> +++ b/arch/loongarch64/reloc.h
> @@ -0,0 +1,29 @@
> +#if defined __loongarch_double_float
> +#define FP_SUFFIX "-lp64d"
> +#elif defined __loongarch_single_float
> +#define FP_SUFFIX "-lp64f"
> +#elif defined __loongarch_soft_float
> +#define FP_SUFFIX "-lp64s"
> +#endif
> +
> +#define LDSO_ARCH "loongarch64" FP_SUFFIX
> +
> +#define TPOFF_K 0
> +
> +#define REL_PLT R_LARCH_JUMP_SLOT
> +#define REL_COPY R_LARCH_COPY
> +#define REL_DTPMOD R_LARCH_TLS_DTPMOD64
> +#define REL_DTPOFF R_LARCH_TLS_DTPREL64
> +#define REL_TPOFF R_LARCH_TLS_TPREL64
> +#define REL_RELATIVE R_LARCH_RELATIVE
> +#define REL_SYMBOLIC R_LARCH_64
> +
> +#define CRTJMP(pc,sp) __asm__ __volatile__( \
> + "move $sp, %1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )
> +
> +#define GETFUNCSYM(fp, sym, got) __asm__ ( \
> + ".hidden " #sym "\n" \
> + ".align 8 \n" \
> + " la.local $t1, "#sym" \n" \
> + " move %0, $t1 \n" \
> + : "=r"(*(fp)) : : "memory" )
> diff --git a/arch/loongarch64/syscall_arch.h b/arch/loongarch64/syscall_arch.h
> new file mode 100644
> index 00000000..4d5e1885
> --- /dev/null
> +++ b/arch/loongarch64/syscall_arch.h
> @@ -0,0 +1,137 @@
> +#define __SYSCALL_LL_E(x) (x)
> +#define __SYSCALL_LL_O(x) (x)
> +
> +#define SYSCALL_CLOBBERLIST \
> + "$t0", "$t1", "$t2", "$t3", \
> + "$t4", "$t5", "$t6", "$t7", "$t8", "memory"
> +
> +static inline long __syscall0(long n)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0");
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "=r"(a0)
> + : "r"(a7)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +static inline long __syscall1(long n, long a)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0") = a;
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "+r"(a0)
> + : "r"(a7)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +static inline long __syscall2(long n, long a, long b)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0") = a;
> + register long a1 __asm__("$a1") = b;
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "+r"(a0)
> + : "r"(a7), "r"(a1)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +static inline long __syscall3(long n, long a, long b, long c)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0") = a;
> + register long a1 __asm__("$a1") = b;
> + register long a2 __asm__("$a2") = c;
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "+r"(a0)
> + : "r"(a7), "r"(a1), "r"(a2)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +static inline long __syscall4(long n, long a, long b, long c, long d)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0") = a;
> + register long a1 __asm__("$a1") = b;
> + register long a2 __asm__("$a2") = c;
> + register long a3 __asm__("$a3") = d;
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "+r"(a0)
> + : "r"(a7), "r"(a1), "r"(a2), "r"(a3)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +static inline long __syscall5(long n, long a, long b, long c, long d, long e)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0") = a;
> + register long a1 __asm__("$a1") = b;
> + register long a2 __asm__("$a2") = c;
> + register long a3 __asm__("$a3") = d;
> + register long a4 __asm__("$a4") = e;
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "+r"(a0)
> + : "r"(a7), "r"(a1), "r"(a2), "r"(a3), "r"(a4)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0") = a;
> + register long a1 __asm__("$a1") = b;
> + register long a2 __asm__("$a2") = c;
> + register long a3 __asm__("$a3") = d;
> + register long a4 __asm__("$a4") = e;
> + register long a5 __asm__("$a5") = f;
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "+r"(a0)
> + : "r"(a7), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +static inline long __syscall7(long n, long a, long b, long c, long d, long e, long f, long g)
> +{
> + register long a7 __asm__("$a7") = n;
> + register long a0 __asm__("$a0") = a;
> + register long a1 __asm__("$a1") = b;
> + register long a2 __asm__("$a2") = c;
> + register long a3 __asm__("$a3") = d;
> + register long a4 __asm__("$a4") = e;
> + register long a5 __asm__("$a5") = f;
> + register long a6 __asm__("$a6") = g;
> +
> + __asm__ __volatile__ (
> + "syscall 0"
> + : "+r"(a0)
> + : "r"(a7), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5), "r"(a6)
> + : SYSCALL_CLOBBERLIST);
> + return a0;
> +}
> +
> +#define VDSO_USEFUL
> +#define VDSO_CGT_SYM "__vdso_clock_gettime"
> +#define VDSO_CGT_VER "LINUX_5.10"
> +
> +#define IPC_64 0
> diff --git a/configure b/configure
> index 0b966ede..93b06287 100755
> --- a/configure
> +++ b/configure
> @@ -328,6 +328,7 @@ i?86*) ARCH=i386 ;;
> x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;;
> x86_64-nt64*) ARCH=nt64 ;;
> x86_64*) ARCH=x86_64 ;;
> +loongarch64*) ARCH=loongarch64 ;;
> m68k*) ARCH=m68k ;;
> mips64*|mipsisa64*) ARCH=mips64 ;;
> mips*) ARCH=mips ;;
> @@ -671,6 +672,20 @@ if test "$ARCH" = "aarch64" ; then
> trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be
> fi
>
> +if test "$ARCH" = "loongarch64" ; then
> +trycppif __loongarch_double_float "$t" && SUBARCH=${SUBARCH}-lp64d
> +trycppif __loongarch_single_float "$t" && SUBARCH=${SUBARCH}-lp64f
> +trycppif __loongarch_soft_float "$t" && SUBARCH=${SUBARCH}-lp64s
> +printf "checking whether compiler support FCSRs... "
> +echo "__asm__(\"movfcsr2gr \$t0,\$fcsr0\");" > "$tmpc"
> +if $CC -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
> +printf "yes\n"
> +else
> +printf "no\n"
> +CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_LOONGARCH_FCSR_ASM"
> +fi
> +fi
> +
> if test "$ARCH" = "m68k" ; then
> if trycppif "__HAVE_68881__" ; then : ;
> elif trycppif "__mcffpu__" ; then SUBARCH="-fp64"
> diff --git a/include/elf.h b/include/elf.h
> index 23f2c4bc..7114f262 100644
> --- a/include/elf.h
> +++ b/include/elf.h
> @@ -315,7 +315,8 @@ typedef struct {
> #define EM_RISCV 243
> #define EM_BPF 247
> #define EM_CSKY 252
> -#define EM_NUM 253
> +#define EM_LOONGARCH 258
> +#define EM_NUM 259
>
> #define EM_ALPHA 0x9026
>
> @@ -699,6 +700,11 @@ typedef struct {
> #define NT_MIPS_FP_MODE 0x801
> #define NT_MIPS_MSA 0x802
> #define NT_VERSION 1
> +#define NT_LOONGARCH_CPUCFG 0xa00
> +#define NT_LOONGARCH_CSR 0xa01
> +#define NT_LOONGARCH_LSX 0xa02
> +#define NT_LOONGARCH_LASX 0xa03
> +#define NT_LOONGARCH_LBT 0xa04
>
>
>
> @@ -3293,6 +3299,102 @@ enum
> #define R_RISCV_SET32 56
> #define R_RISCV_32_PCREL 57
>
> +#define EF_LARCH_ABI_MODIFIER_MASK 0x07
> +#define EF_LARCH_ABI_SOFT_FLOAT 0x01
> +#define EF_LARCH_ABI_SINGLE_FLOAT 0x02
> +#define EF_LARCH_ABI_DOUBLE_FLOAT 0x03
> +#define EF_LARCH_OBJABI_V1 0x40
> +
> +#define R_LARCH_NONE 0
> +#define R_LARCH_32 1
> +#define R_LARCH_64 2
> +#define R_LARCH_RELATIVE 3
> +#define R_LARCH_COPY 4
> +#define R_LARCH_JUMP_SLOT 5
> +#define R_LARCH_TLS_DTPMOD32 6
> +#define R_LARCH_TLS_DTPMOD64 7
> +#define R_LARCH_TLS_DTPREL32 8
> +#define R_LARCH_TLS_DTPREL64 9
> +#define R_LARCH_TLS_TPREL32 10
> +#define R_LARCH_TLS_TPREL64 11
> +#define R_LARCH_IRELATIVE 12
> +#define R_LARCH_MARK_LA 20
> +#define R_LARCH_MARK_PCREL 21
> +#define R_LARCH_SOP_PUSH_PCREL 22
> +#define R_LARCH_SOP_PUSH_ABSOLUTE 23
> +#define R_LARCH_SOP_PUSH_DUP 24
> +#define R_LARCH_SOP_PUSH_GPREL 25
> +#define R_LARCH_SOP_PUSH_TLS_TPREL 26
> +#define R_LARCH_SOP_PUSH_TLS_GOT 27
> +#define R_LARCH_SOP_PUSH_TLS_GD 28
> +#define R_LARCH_SOP_PUSH_PLT_PCREL 29
> +#define R_LARCH_SOP_ASSERT 30
> +#define R_LARCH_SOP_NOT 31
> +#define R_LARCH_SOP_SUB 32
> +#define R_LARCH_SOP_SL 33
> +#define R_LARCH_SOP_SR 34
> +#define R_LARCH_SOP_ADD 35
> +#define R_LARCH_SOP_AND 36
> +#define R_LARCH_SOP_IF_ELSE 37
> +#define R_LARCH_SOP_POP_32_S_10_5 38
> +#define R_LARCH_SOP_POP_32_U_10_12 39
> +#define R_LARCH_SOP_POP_32_S_10_12 40
> +#define R_LARCH_SOP_POP_32_S_10_16 41
> +#define R_LARCH_SOP_POP_32_S_10_16_S2 42
> +#define R_LARCH_SOP_POP_32_S_5_20 43
> +#define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44
> +#define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45
> +#define R_LARCH_SOP_POP_32_U 46
> +#define R_LARCH_ADD8 47
> +#define R_LARCH_ADD16 48
> +#define R_LARCH_ADD24 49
> +#define R_LARCH_ADD32 50
> +#define R_LARCH_ADD64 51
> +#define R_LARCH_SUB8 52
> +#define R_LARCH_SUB16 53
> +#define R_LARCH_SUB24 54
> +#define R_LARCH_SUB32 55
> +#define R_LARCH_SUB64 56
> +#define R_LARCH_GNU_VTINHERIT 57
> +#define R_LARCH_GNU_VTENTRY 58
> +#define R_LARCH_B16 64
> +#define R_LARCH_B21 65
> +#define R_LARCH_B26 66
> +#define R_LARCH_ABS_HI20 67
> +#define R_LARCH_ABS_LO12 68
> +#define R_LARCH_ABS64_LO20 69
> +#define R_LARCH_ABS64_HI12 70
> +#define R_LARCH_PCALA_HI20 71
> +#define R_LARCH_PCALA_LO12 72
> +#define R_LARCH_PCALA64_LO20 73
> +#define R_LARCH_PCALA64_HI12 74
> +#define R_LARCH_GOT_PC_HI20 75
> +#define R_LARCH_GOT_PC_LO12 76
> +#define R_LARCH_GOT64_PC_LO20 77
> +#define R_LARCH_GOT64_PC_HI12 78
> +#define R_LARCH_GOT_HI20 79
> +#define R_LARCH_GOT_LO12 80
> +#define R_LARCH_GOT64_LO20 81
> +#define R_LARCH_GOT64_HI12 82
> +#define R_LARCH_TLS_LE_HI20 83
> +#define R_LARCH_TLS_LE_LO12 84
> +#define R_LARCH_TLS_LE64_LO20 85
> +#define R_LARCH_TLS_LE64_HI12 86
> +#define R_LARCH_TLS_IE_PC_HI20 87
> +#define R_LARCH_TLS_IE_PC_LO12 88
> +#define R_LARCH_TLS_IE64_PC_LO20 89
> +#define R_LARCH_TLS_IE64_PC_HI12 90
> +#define R_LARCH_TLS_IE_HI20 91
> +#define R_LARCH_TLS_IE_LO12 92
> +#define R_LARCH_TLS_IE64_LO20 93
> +#define R_LARCH_TLS_IE64_HI12 94
> +#define R_LARCH_TLS_LD_PC_HI20 95
> +#define R_LARCH_TLS_LD_HI20 96
> +#define R_LARCH_TLS_GD_PC_HI20 97
> +#define R_LARCH_TLS_GD_HI20 98
> +#define R_LARCH_32_PCREL 99
> +#define R_LARCH_RELAX 100
> +
> #ifdef __cplusplus
> }
> #endif
> diff --git a/src/fenv/loongarch64/fenv.S b/src/fenv/loongarch64/fenv.S
> new file mode 100644
> index 00000000..54064e01
> --- /dev/null
> +++ b/src/fenv/loongarch64/fenv.S
> @@ -0,0 +1,78 @@
> +#ifndef __loongarch_soft_float
> +
> +#ifdef BROKEN_LOONGARCH_FCSR_ASM
> +#define FCSR $r0
> +#else
> +#define FCSR $fcsr0
> +#endif
> +
> +.global feclearexcept
> +.type feclearexcept,@function
> +feclearexcept:
> + li.w $t0, 0x1f0000
> + and $a0, $a0, $t0
> + movfcsr2gr $t1, FCSR
> + andn $t1, $t1, $a0
> + movgr2fcsr FCSR, $t1
> + li.w $a0, 0
> + jr $ra
> +
> +.global feraiseexcept
> +.type feraiseexcept,@function
> +feraiseexcept:
> + li.w $t0, 0x1f0000
> + and $a0, $a0, $t0
> + movfcsr2gr $t1, FCSR
> + or $t1, $t1, $a0
> + movgr2fcsr FCSR, $t1
> + li.w $a0, 0
> + jr $ra
> +
> +.global fetestexcept
> +.type fetestexcept,@function
> +fetestexcept:
> + li.w $t0, 0x1f0000
> + and $a0, $a0, $t0
> + movfcsr2gr $t1, FCSR
> + and $a0, $t1, $a0
> + jr $ra
> +
> +.global fegetround
> +.type fegetround,@function
> +fegetround:
> + movfcsr2gr $t0, FCSR
> + andi $a0, $t0, 0x300
> + jr $ra
> +
> +.global __fesetround
> +.hidden __fesetround
> +.type __fesetround,@function
> +__fesetround:
> + li.w $t0, 0x300
> + and $a0, $a0, $t0
> + movfcsr2gr $t1, FCSR
> + andn $t1, $t1, $t0
> + or $t1, $t1, $a0
> + movgr2fcsr FCSR, $t1
> + li.w $a0, 0
> + jr $ra
> +
> +.global fegetenv
> +.type fegetenv,@function
> +fegetenv:
> + movfcsr2gr $t0, FCSR
> + st.w $t0, $a0, 0
> + li.w $a0, 0
> + jr $ra
> +
> +.global fesetenv
> +.type fesetenv,@function
> +fesetenv:
> + addi.d $t0, $a0, 1
> + beq $t0, $r0, 1f
> + ld.w $t0, $a0, 0
> +1: movgr2fcsr FCSR, $t0
> + li.w $a0, 0
> + jr $ra
> +
> +#endif
> diff --git a/src/ldso/loongarch64/dlsym.s b/src/ldso/loongarch64/dlsym.s
> new file mode 100644
> index 00000000..26fabcdb
> --- /dev/null
> +++ b/src/ldso/loongarch64/dlsym.s
> @@ -0,0 +1,7 @@
> +.global dlsym
> +.hidden __dlsym
> +.type dlsym,@function
> +dlsym:
> + move $a2, $ra
> + la.global $t0, __dlsym
> + jr $t0
> diff --git a/src/setjmp/loongarch64/longjmp.S b/src/setjmp/loongarch64/longjmp.S
> new file mode 100644
> index 00000000..896d2e26
> --- /dev/null
> +++ b/src/setjmp/loongarch64/longjmp.S
> @@ -0,0 +1,32 @@
> +.global _longjmp
> +.global longjmp
> +.type _longjmp,@function
> +.type longjmp,@function
> +_longjmp:
> +longjmp:
> + ld.d $ra, $a0, 0
> + ld.d $sp, $a0, 8
> + ld.d $r21,$a0, 16
> + ld.d $fp, $a0, 24
> + ld.d $s0, $a0, 32
> + ld.d $s1, $a0, 40
> + ld.d $s2, $a0, 48
> + ld.d $s3, $a0, 56
> + ld.d $s4, $a0, 64
> + ld.d $s5, $a0, 72
> + ld.d $s6, $a0, 80
> + ld.d $s7, $a0, 88
> + ld.d $s8, $a0, 96
> +#ifndef __loongarch_soft_float
> + fld.d $fs0, $a0, 104
> + fld.d $fs1, $a0, 112
> + fld.d $fs2, $a0, 120
> + fld.d $fs3, $a0, 128
> + fld.d $fs4, $a0, 136
> + fld.d $fs5, $a0, 144
> + fld.d $fs6, $a0, 152
> + fld.d $fs7, $a0, 160
> +#endif
> + sltui $a0, $a1, 1
> + add.d $a0, $a0, $a1
> + jr $ra
> diff --git a/src/setjmp/loongarch64/setjmp.S b/src/setjmp/loongarch64/setjmp.S
> new file mode 100644
> index 00000000..d158a3d2
> --- /dev/null
> +++ b/src/setjmp/loongarch64/setjmp.S
> @@ -0,0 +1,34 @@
> +.global __setjmp
> +.global _setjmp
> +.global setjmp
> +.type __setjmp,@function
> +.type _setjmp,@function
> +.type setjmp,@function
> +__setjmp:
> +_setjmp:
> +setjmp:
> + st.d $ra, $a0, 0
> + st.d $sp, $a0, 8
> + st.d $r21,$a0, 16
> + st.d $fp, $a0, 24
> + st.d $s0, $a0, 32
> + st.d $s1, $a0, 40
> + st.d $s2, $a0, 48
> + st.d $s3, $a0, 56
> + st.d $s4, $a0, 64
> + st.d $s5, $a0, 72
> + st.d $s6, $a0, 80
> + st.d $s7, $a0, 88
> + st.d $s8, $a0, 96
> +#ifndef __loongarch_soft_float
> + fst.d $fs0, $a0, 104
> + fst.d $fs1, $a0, 112
> + fst.d $fs2, $a0, 120
> + fst.d $fs3, $a0, 128
> + fst.d $fs4, $a0, 136
> + fst.d $fs5, $a0, 144
> + fst.d $fs6, $a0, 152
> + fst.d $fs7, $a0, 160
> +#endif
> + move $a0, $zero
> + jr $ra
> diff --git a/src/signal/loongarch64/restore.s b/src/signal/loongarch64/restore.s
> new file mode 100644
> index 00000000..f8e6daeb
> --- /dev/null
> +++ b/src/signal/loongarch64/restore.s
> @@ -0,0 +1,10 @@
> +.global __restore_rt
> +.global __restore
> +.hidden __restore_rt
> +.hidden __restore
> +.type __restore_rt,@function
> +.type __restore,@function
> +__restore_rt:
> +__restore:
> + li.w $a7, 139
> + syscall 0
> diff --git a/src/signal/loongarch64/sigsetjmp.s b/src/signal/loongarch64/sigsetjmp.s
> new file mode 100644
> index 00000000..992ab1a4
> --- /dev/null
> +++ b/src/signal/loongarch64/sigsetjmp.s
> @@ -0,0 +1,25 @@
> +.global sigsetjmp
> +.global __sigsetjmp
> +.type sigsetjmp,@function
> +.type __sigsetjmp,@function
> +sigsetjmp:
> +__sigsetjmp:
> + beq $a1, $zero, 1f
> + st.d $ra, $a0, 168
> + st.d $s0, $a0, 176
> + move $s0, $a0
> +
> + la.global $t0, setjmp
> + jirl $ra, $t0, 0
> +
> + move $a1, $a0 # Return from 'setjmp' or 'longjmp'
> + move $a0, $s0
> + ld.d $ra, $a0, 168
> + ld.d $s0, $a0, 176
> +
> +.hidden __sigsetjmp_tail
> + la.global $t0, __sigsetjmp_tail
> + jr $t0
> +1:
> + la.global $t0, setjmp
> + jr $t0
> diff --git a/src/thread/loongarch64/__set_thread_area.s b/src/thread/loongarch64/__set_thread_area.s
> new file mode 100644
> index 00000000..ffdd52f1
> --- /dev/null
> +++ b/src/thread/loongarch64/__set_thread_area.s
> @@ -0,0 +1,7 @@
> +.global __set_thread_area
> +.hidden __set_thread_area
> +.type __set_thread_area,@function
> +__set_thread_area:
> + move $tp, $a0
> + move $a0, $zero
> + jr $ra
> diff --git a/src/thread/loongarch64/__unmapself.s b/src/thread/loongarch64/__unmapself.s
> new file mode 100644
> index 00000000..1de334af
> --- /dev/null
> +++ b/src/thread/loongarch64/__unmapself.s
> @@ -0,0 +1,7 @@
> +.global __unmapself
> +.type __unmapself, @function
> +__unmapself:
> + li.d $a7, 215 # call munmap
> + syscall 0
> + li.d $a7, 93 # call exit
> + syscall 0
> diff --git a/src/thread/loongarch64/clone.s b/src/thread/loongarch64/clone.s
> new file mode 100644
> index 00000000..db9015e6
> --- /dev/null
> +++ b/src/thread/loongarch64/clone.s
> @@ -0,0 +1,28 @@
> +#__clone(func, stack, flags, arg, ptid, tls, ctid)
> +# a0, a1, a2, a3, a4, a5, a6
> +# sys_clone(flags, stack, ptid, ctid, tls)
> +# a0, a1, a2, a3, a4
> +
> +.global __clone
> +.hidden __clone
> +.type __clone,@function
> +__clone:
> + # Save function pointer and argument pointer on new thread stack
> + addi.d $a1, $a1, -16
> + st.d $a0, $a1, 0 # save function pointer
> + st.d $a3, $a1, 8 # save argument pointer
> + or $a0, $a2, $zero
> + or $a2, $a4, $zero
> + or $a3, $a6, $zero
> + or $a4, $a5, $zero
> + ori $a7, $zero, 220
> + syscall 0 # call clone
> +
> + beqz $a0, 1f # whether child process
> + jirl $zero, $ra, 0 # parent process return
> +1:
> + ld.d $t8, $sp, 0 # function pointer
> + ld.d $a0, $sp, 8 # argument pointer
> + jirl $ra, $t8, 0 # call the user's function
> + ori $a7, $zero, 93
> + syscall 0 # child process exit
> diff --git a/src/thread/loongarch64/syscall_cp.s b/src/thread/loongarch64/syscall_cp.s
> new file mode 100644
> index 00000000..0fbc7a47
> --- /dev/null
> +++ b/src/thread/loongarch64/syscall_cp.s
> @@ -0,0 +1,29 @@
> +.global __cp_begin
> +.hidden __cp_begin
> +.global __cp_end
> +.hidden __cp_end
> +.global __cp_cancel
> +.hidden __cp_cancel
> +.hidden __cancel
> +.global __syscall_cp_asm
> +.hidden __syscall_cp_asm
> +.type __syscall_cp_asm,@function
> +
> +__syscall_cp_asm:
> +__cp_begin:
> + ld.w $a0, $a0, 0
> + bnez $a0, __cp_cancel
> + move $t8, $a1 # reserve system call number
> + move $a0, $a2
> + move $a1, $a3
> + move $a2, $a4
> + move $a3, $a5
> + move $a4, $a6
> + move $a5, $a7
> + move $a7, $t8
> + syscall 0
> +__cp_end:
> + jr $ra
> +__cp_cancel:
> + la.local $t8, __cancel
> + jr $t8
> --
> 2.37.1
>
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