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| author | Rich Felker <dalias@aerifal.cx> | 2019-07-17 18:50:15 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2019-07-17 18:50:15 -0400 |
| commit | 8eb49e0485fc547eead9e47200bbee6d81f391c1 (patch) | |
| tree | 393cbf5431a7d053eef7d2a36e031ea8e62421d8 | |
| parent | 1a28c6eade3046e73da0e80bbb7c377f24f514c7 (diff) | |
| download | musl-8eb49e0485fc547eead9e47200bbee6d81f391c1.tar.gz | |
fix riscv64 syscall asm constraint
having "+r"(a0) is redundant with "0"(a0) in syscalls with at least 1
arg, which is arguably a constraint violation (clang treats it as
such), and an invalid input with indeterminate value in the 0-arg
case. use the "=r"(a0) form instead.
| -rw-r--r-- | arch/riscv64/syscall_arch.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv64/syscall_arch.h b/arch/riscv64/syscall_arch.h index 1aaeb631..3e0804ef 100644 --- a/arch/riscv64/syscall_arch.h +++ b/arch/riscv64/syscall_arch.h @@ -3,7 +3,7 @@ #define __asm_syscall(...) \ __asm__ __volatile__ ("ecall\n\t" \ - : "+r"(a0) : __VA_ARGS__ : "memory"); \ + : "=r"(a0) : __VA_ARGS__ : "memory"); \ return a0; \ static inline long __syscall0(long n) |