RepoMirrors
/
musl
mirror of git://git.musl-libc.org/musl
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fix broken posix_fadvise on mips due to missing 7-arg syscall support 

commit 788d5e24ca 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.
This commit is contained in:
Rich Felker 2019-05-05 11:24:57 -04:00
parent d7b583420b
commit d02e72ad51
1 changed files with 25 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
arch/mips/syscall_arch.h
View File

@ -147,6 +147,31 @@ static inline long __syscall6(long n, long a, long b, long c, long d, long e, lo
return r2; 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_USEFUL
#define VDSO_CGT_SYM "__vdso_clock_gettime" #define VDSO_CGT_SYM "__vdso_clock_gettime"
#define VDSO_CGT_VER "LINUX_2.6" #define VDSO_CGT_VER "LINUX_2.6"