> fadvise cases should check TEST_ERRNO instead of TEST_RETURN.
Do you mean man page is incorrect?
man fadvise:
POSIX_FADVISE(2) Linux Programmer’s Manual
POSIX_FADVISE(2)
...
RETURN VALUE
On success, zero is returned. On error, an error number is returned.
----------------------------------------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^
glibc/sysdeps/unix/sysv/linux/i386/posix_fadvise64.S:
#ifdef __NR_fadvise64_64
/* Save registers. */
pushl %ebp
cfi_adjust_cfa_offset (4)
pushl %ebx
cfi_adjust_cfa_offset (4)
pushl %esi
cfi_adjust_cfa_offset (4)
pushl %edi
cfi_adjust_cfa_offset (4)
movl FD(%esp), %ebx
cfi_rel_offset (ebx, 8)
movl OFFLO(%esp), %ecx
movl OFFHI(%esp), %edx
movl LENLO(%esp), %esi
cfi_rel_offset (esi, 4)
movl LENHI(%esp), %edi
cfi_rel_offset (edi, 0)
movl FLAGS(%esp), %ebp
cfi_rel_offset (ebp, 12)
movl $SYS_ify(fadvise64_64), %eax
ENTER_KERNEL
/* Restore registers. */
popl %edi
cfi_adjust_cfa_offset (-4)
cfi_restore (edi)
popl %esi
cfi_adjust_cfa_offset (-4)
cfi_restore (esi)
popl %ebx
cfi_adjust_cfa_offset (-4)
cfi_restore (ebx)
popl %ebp
cfi_adjust_cfa_offset (-4)
cfi_restore (ebp)
#ifndef __ASSUME_FADVISE64_64_SYSCALL
cmpl $-ENOSYS, %eax
je 1f
#endif
/* The function returns zero, or the error number. So all we
have to do is negate the value passed back from the kernel. */
/* If 0 > %eax > -4096 there was an error. */
------> negl %eax
------------------------------------------------------------------------------
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