From 6349ae7c3d96c8d00179e290d1ccf8a2d8438cc8 Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Sat, 13 Feb 2021 17:08:21 +0300 Subject: [PATCH] Add ARC700 support glibc does not officially support ARC700 so this adds the missing pieces. I looked at uClibc-ng and a patch by Synopsis for glibc. [Alexey] Taken from https://github.com/openwrt/openwrt/commit/33646a51abcf15ff5c5363848287e1ed778b7467 Signed-off-by: Rosen Penev Signed-off-by: Alexey Brodkin --- sysdeps/arc/atomic-machine.h | 4 ++++ sysdeps/unix/sysv/linux/arc/syscall.S | 5 +++++ sysdeps/unix/sysv/linux/arc/sysdep.h | 8 ++++++++ 3 files changed, 17 insertions(+) --- a/sysdeps/arc/atomic-machine.h +++ b/sysdeps/arc/atomic-machine.h @@ -64,6 +64,10 @@ __atomic_val_bysize (__arch_compare_and_exchange_val, int, \ mem, new, old, __ATOMIC_ACQUIRE) +#ifdef __ARC700__ +#define atomic_full_barrier() ({ asm volatile ("sync":::"memory"); }) +#else #define atomic_full_barrier() ({ asm volatile ("dmb 3":::"memory"); }) +#endif #endif /* _ARC_BITS_ATOMIC_H */ --- a/sysdeps/unix/sysv/linux/arc/syscall.S +++ b/sysdeps/unix/sysv/linux/arc/syscall.S @@ -24,8 +24,13 @@ mov_s r1, r2 mov_s r2, r3 mov_s r3, r4 +#ifdef __ARC700__ + mov r4, r5 + mov r5, r6 +#else mov_s r4, r5 mov_s r5, r6 +#endif ARC_TRAP_INSN brhi r0, -4096, L (call_syscall_err) --- a/sysdeps/unix/sysv/linux/arc/sysdep.h +++ b/sysdeps/unix/sysv/linux/arc/sysdep.h @@ -128,7 +128,11 @@ mov r8, __NR_##syscall_name ASM_LINE_SEP \ ARC_TRAP_INSN ASM_LINE_SEP +# ifdef __ARC700__ +# define ARC_TRAP_INSN trap0 +# else # define ARC_TRAP_INSN trap_s 0 +# endif #else /* !__ASSEMBLER__ */ @@ -139,7 +143,11 @@ hidden_proto (__syscall_error) # endif +# ifdef __ARC700__ +# define ARC_TRAP_INSN "trap0 \n\t" +# else # define ARC_TRAP_INSN "trap_s 0 \n\t" +#endif # undef INTERNAL_SYSCALL_NCS # define INTERNAL_SYSCALL_NCS(number, nr_args, args...) \