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fix fstatat syscall on mips64 

mips64 requires 'struct stat' conversion due to incorrect 32-bit
fields where time_t should be in the kernel version of the structure.
syscall_arch.h already performed the correct translation for stat,
fstat, and lstat syscalls, but omitted special handling for fstatat.
This commit is contained in:
Rich Felker 2017-05-31 21:46:15 -04:00
parent 81f4a1200a
commit 4073f03add
1 changed files with 23 additions and 4 deletions
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27
arch/mips64/syscall_arch.h
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@ -149,13 +149,15 @@ static inline long __syscall4(long n, long a, long b, long c, long d)
register long r7 __asm__("$7");
register long r2 __asm__("$2");
r5 = b;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
r5 = (long) &kst;
r4 = a;
r5 = b;
r6 = c;
r7 = d;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
r5 = (long) &kst;
if (n == SYS_newfstatat)
r6 = (long) &kst;
__asm__ __volatile__ (
"daddu $2,$0,%2 ; syscall"
: "=&r"(r2), "=r"(r7) : "ir"(n), "0"(r2), "1"(r7),
@ -168,6 +170,8 @@ static inline long __syscall4(long n, long a, long b, long c, long d)
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
__stat_fix(&kst, (struct stat *)b);
if (n == SYS_newfstatat)
__stat_fix(&kst, (struct stat *)c);
return ret;
}
@ -224,16 +228,21 @@ static inline long __syscall4(long n, long a, long b, long c, long d)
{
long r2;
long old_b = b;
long old_c = c;
struct kernel_stat kst;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
b = (long) &kst;
if (n == SYS_newfstatat)
c = (long) &kst;
r2 = (__syscall)(n, a, b, c, d);
if (r2 > -4096UL) return r2;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
__stat_fix(&kst, (struct stat *)old_b);
if (n == SYS_newfstatat)
__stat_fix(&kst, (struct stat *)old_c);
return r2;
}
@ -244,16 +253,21 @@ static inline long __syscall5(long n, long a, long b, long c, long d, long e)
{
long r2;
long old_b = b;
long old_c = c;
struct kernel_stat kst;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
b = (long) &kst;
if (n == SYS_newfstatat)
c = (long) &kst;
r2 = (__syscall)(n, a, b, c, d, e);
if (r2 > -4096UL) return r2;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
__stat_fix(&kst, (struct stat *)old_b);
if (n == SYS_newfstatat)
__stat_fix(&kst, (struct stat *)old_c);
return r2;
}
@ -262,16 +276,21 @@ static inline long __syscall6(long n, long a, long b, long c, long d, long e, lo
{
long r2;
long old_b = b;
long old_c = c;
struct kernel_stat kst;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
b = (long) &kst;
if (n == SYS_newfstatat)
c = (long) &kst;
r2 = (__syscall)(n, a, b, c, d, e, f);
if (r2 > -4096UL) return r2;
if (n == SYS_stat || n == SYS_fstat || n == SYS_lstat)
__stat_fix(&kst, (struct stat *)old_b);
if (n == SYS_newfstatat)
__stat_fix(&kst, (struct stat *)old_c);
return r2;
}