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| author | Aleksandar Markovic <aleksandar.markovic@imgtec.com> | 2016-10-12 14:30:25 +0200 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2016-10-21 15:20:13 +0300 |
| commit | 2f2bd444bea156c5ba8dccf3b3b018c770fba03b (patch) | |
| tree | 945daef1d4582c1237ead181872c6131418923a7 | |
| parent | 6e8b33d89d4f2e9936acc375af3af39b5b6ec4e5 (diff) | |
| download | focaccia-qemu-2f2bd444bea156c5ba8dccf3b3b018c770fba03b.tar.gz focaccia-qemu-2f2bd444bea156c5ba8dccf3b3b018c770fba03b.zip | |
linux-user: Fix fadvise64() syscall support for Mips32
By looking at the file arch/mips/kernel/scall32-o32.S in Linux
kernel, it can be deduced that, for Mips32 platform, syscall
corresponding to number _NR_fadvise64 as defined in kernel file
arch/mips/include/uapi/asm/unistd.h translates to kernel function
sys_fadvise64_64, and that argument layout for this system call is
as follows:
0 32 0 32
+----------------+----------------+
(arg1) | fd | __pad | (arg2)
+----------------+----------------+
(arg3) | buffer | (arg4)
+----------------+----------------+
(arg5) | len | (arg6)
+----------------+----------------+
(arg7) | advise | not used | (arg8)
+----------------+----------------+
The same argument layout can be deduced from glibc code, and
relevant commit messages in linux kernel and glibc.
The fix is to change TARGET_NR_fadvise64 to TARGET_NR_fadvise64_64
in Mips32 syscall numbers table. Array mips_syscall_args[] in
linux-user/main.c also already have "fadvise64_64" (and not
"fadvise64") in corresponding place for the syscall number in
question, so no change for linux-user/main.c.
This patch also fixes the failure LTP test posix_fadvise03, if
executed on Qemu-emulated Mips32 platform (user mode).
Signed-off-by: Aleksandar Rikalo <aleksandar.rikalo@imgtec.com>
Signed-off-by: Miroslav Tisma <miroslav.tisma@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
| -rw-r--r-- | linux-user/mips/syscall_nr.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/linux-user/mips/syscall_nr.h b/linux-user/mips/syscall_nr.h index 6819f865ed..ced32806ea 100644 --- a/linux-user/mips/syscall_nr.h +++ b/linux-user/mips/syscall_nr.h @@ -256,7 +256,7 @@ #define TARGET_NR_remap_file_pages (TARGET_NR_Linux + 251) #define TARGET_NR_set_tid_address (TARGET_NR_Linux + 252) #define TARGET_NR_restart_syscall (TARGET_NR_Linux + 253) -#define TARGET_NR_fadvise64 (TARGET_NR_Linux + 254) +#define TARGET_NR_fadvise64_64 (TARGET_NR_Linux + 254) #define TARGET_NR_statfs64 (TARGET_NR_Linux + 255) #define TARGET_NR_fstatfs64 (TARGET_NR_Linux + 256) #define TARGET_NR_timer_create (TARGET_NR_Linux + 257) |