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| author | Rich Felker <dalias@aerifal.cx> | 2019-05-05 11:24:57 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2019-05-05 11:24:57 -0400 |
| commit | d02e72ad51ea3b06cb168d872e3e5c126bb3df9d (patch) | |
| tree | 03c0f5eb0b6244972f95756fb1ca09b683dae376 /arch/mips | |
| parent | d7b583420bfc0897b6ccc90afb7e41333a221c09 (diff) | |
| download | musl-d02e72ad51ea3b06cb168d872e3e5c126bb3df9d.tar.gz musl-d02e72ad51ea3b06cb168d872e3e5c126bb3df9d.tar.bz2 musl-d02e72ad51ea3b06cb168d872e3e5c126bb3df9d.tar.xz musl-d02e72ad51ea3b06cb168d872e3e5c126bb3df9d.zip | |
fix broken posix_fadvise on mips due to missing 7-arg syscall support
commit 788d5e24ca19c6291cebd8d1ad5b5ed6abf42665 exposed the breakage
at build time by removing support for 7-argument syscalls; however,
the external __syscall function provided for mips before did not pass
a 7th argument from the stack, so the behavior was just silently
broken.
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/syscall_arch.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/mips/syscall_arch.h b/arch/mips/syscall_arch.h index 3b33ce18..43bcdee7 100644 --- a/arch/mips/syscall_arch.h +++ b/arch/mips/syscall_arch.h @@ -147,6 +147,31 @@ static inline long __syscall6(long n, long a, long b, long c, long d, long e, lo return r2; } +static inline long __syscall7(long n, long a, long b, long c, long d, long e, long f, long g) +{ + register long r4 __asm__("$4") = a; + register long r5 __asm__("$5") = b; + register long r6 __asm__("$6") = c; + register long r7 __asm__("$7") = d; + register long r8 __asm__("$8") = e; + register long r9 __asm__("$9") = f; + register long r10 __asm__("$10") = g; + register long r2 __asm__("$2"); + __asm__ __volatile__ ( + "subu $sp,$sp,32 ; sw $8,16($sp) ; sw $9,20($sp) ; sw $10,24($sp) ; " + "addu $2,$0,%5 ; syscall ;" + "addu $sp,$sp,32" + : "=&r"(r2), "=r"(r7), "+r"(r8), "+r"(r9), "+r"(r10) + : "ir"(n), "0"(r2), "1"(r7), "r"(r4), "r"(r5), "r"(r6) + : "$1", "$3", "$11", "$12", "$13", + "$14", "$15", "$24", "$25", "hi", "lo", "memory"); + if (r7) return -r2; + long ret = r2; + if (n == SYS_stat64 || n == SYS_fstat64 || n == SYS_lstat64) __stat_fix(b); + if (n == SYS_fstatat64) __stat_fix(c); + return r2; +} + #define VDSO_USEFUL #define VDSO_CGT_SYM "__vdso_clock_gettime" #define VDSO_CGT_VER "LINUX_2.6" |