Commit 2ba7f730 authored by Laurent Vivier's avatar Laurent Vivier Committed by Richard Henderson
Browse files

alpha-linux-user: Translate fcntl l_type 



The values of F_RDLCK, F_WRLCK, F_UNLCK, F_EXLCK, F_SHLCK
differ between alpha and other linux architectures.

This patch allows to run "dpkg" (database lock).

Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 249d4172

linux-user/syscall.c

+22 −6
Original line number Diff line number Diff line
@@ -4512,6 +4512,16 @@ static int target_to_host_fcntl_cmd(int cmd) 
    return -TARGET_EINVAL;

}



#define TRANSTBL_CONVERT(a) { -1, TARGET_##a, -1, a }

static const bitmask_transtbl flock_tbl[] = {

    TRANSTBL_CONVERT(F_RDLCK),

    TRANSTBL_CONVERT(F_WRLCK),

    TRANSTBL_CONVERT(F_UNLCK),

    TRANSTBL_CONVERT(F_EXLCK),

    TRANSTBL_CONVERT(F_SHLCK),

    { 0, 0, 0, 0 }

};



static abi_long do_fcntl(int fd, int cmd, abi_ulong arg)

{

    struct flock fl;
@@ -4528,7 +4538,8 @@ static abi_long do_fcntl(int fd, int cmd, abi_ulong arg) 
    case TARGET_F_GETLK:

        if (!lock_user_struct(VERIFY_READ, target_fl, arg, 1))

            return -TARGET_EFAULT;

        fl.l_type = tswap16(target_fl->l_type);

        fl.l_type =

                  target_to_host_bitmask(tswap16(target_fl->l_type), flock_tbl);

        fl.l_whence = tswap16(target_fl->l_whence);

        fl.l_start = tswapal(target_fl->l_start);

        fl.l_len = tswapal(target_fl->l_len);
@@ -4538,7 +4549,8 @@ static abi_long do_fcntl(int fd, int cmd, abi_ulong arg) 
        if (ret == 0) {

            if (!lock_user_struct(VERIFY_WRITE, target_fl, arg, 0))

                return -TARGET_EFAULT;

            target_fl->l_type = tswap16(fl.l_type);

            target_fl->l_type =

                          host_to_target_bitmask(tswap16(fl.l_type), flock_tbl);

            target_fl->l_whence = tswap16(fl.l_whence);

            target_fl->l_start = tswapal(fl.l_start);

            target_fl->l_len = tswapal(fl.l_len);
@@ -4551,7 +4563,8 @@ static abi_long do_fcntl(int fd, int cmd, abi_ulong arg) 
    case TARGET_F_SETLKW:

        if (!lock_user_struct(VERIFY_READ, target_fl, arg, 1))

            return -TARGET_EFAULT;

        fl.l_type = tswap16(target_fl->l_type);

        fl.l_type =

                  target_to_host_bitmask(tswap16(target_fl->l_type), flock_tbl);

        fl.l_whence = tswap16(target_fl->l_whence);

        fl.l_start = tswapal(target_fl->l_start);

        fl.l_len = tswapal(target_fl->l_len);
@@ -4563,7 +4576,8 @@ static abi_long do_fcntl(int fd, int cmd, abi_ulong arg) 
    case TARGET_F_GETLK64:

        if (!lock_user_struct(VERIFY_READ, target_fl64, arg, 1))

            return -TARGET_EFAULT;

        fl64.l_type = tswap16(target_fl64->l_type) >> 1;

        fl64.l_type =

           target_to_host_bitmask(tswap16(target_fl64->l_type), flock_tbl) >> 1;

        fl64.l_whence = tswap16(target_fl64->l_whence);

        fl64.l_start = tswap64(target_fl64->l_start);

        fl64.l_len = tswap64(target_fl64->l_len);
@@ -4573,7 +4587,8 @@ static abi_long do_fcntl(int fd, int cmd, abi_ulong arg) 
        if (ret == 0) {

            if (!lock_user_struct(VERIFY_WRITE, target_fl64, arg, 0))

                return -TARGET_EFAULT;

            target_fl64->l_type = tswap16(fl64.l_type) >> 1;

            target_fl64->l_type =

                   host_to_target_bitmask(tswap16(fl64.l_type), flock_tbl) >> 1;

            target_fl64->l_whence = tswap16(fl64.l_whence);

            target_fl64->l_start = tswap64(fl64.l_start);

            target_fl64->l_len = tswap64(fl64.l_len);
@@ -4585,7 +4600,8 @@ static abi_long do_fcntl(int fd, int cmd, abi_ulong arg) 
    case TARGET_F_SETLKW64:

        if (!lock_user_struct(VERIFY_READ, target_fl64, arg, 1))

            return -TARGET_EFAULT;

        fl64.l_type = tswap16(target_fl64->l_type) >> 1;

        fl64.l_type =

           target_to_host_bitmask(tswap16(target_fl64->l_type), flock_tbl) >> 1;

        fl64.l_whence = tswap16(target_fl64->l_whence);

        fl64.l_start = tswap64(target_fl64->l_start);

        fl64.l_len = tswap64(target_fl64->l_len);

linux-user/syscall_defs.h

+18 −0
Original line number Diff line number Diff line
@@ -2017,6 +2017,12 @@ struct target_statfs64 { 
#define TARGET_F_SETLKW        9

#define TARGET_F_SETOWN        5       /*  for sockets. */

#define TARGET_F_GETOWN        6       /*  for sockets. */



#define TARGET_F_RDLCK         1

#define TARGET_F_WRLCK         2

#define TARGET_F_UNLCK         8

#define TARGET_F_EXLCK         16

#define TARGET_F_SHLCK         32

#elif defined(TARGET_MIPS)

#define TARGET_F_GETLK         14

#define TARGET_F_SETLK         6
@@ -2031,6 +2037,18 @@ struct target_statfs64 { 
#define TARGET_F_GETOWN        9       /*  for sockets. */

#endif



#ifndef TARGET_F_RDLCK

#define TARGET_F_RDLCK         0

#define TARGET_F_WRLCK         1

#define TARGET_F_UNLCK         2

#endif



#ifndef TARGET_F_EXLCK

#define TARGET_F_EXLCK         4

#define TARGET_F_SHLCK         8

#endif





#define TARGET_F_SETSIG        10      /*  for sockets. */

#define TARGET_F_GETSIG        11      /*  for sockets. */