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| author | Peter Maydell <peter.maydell@linaro.org> | 2011-01-06 15:04:17 +0000 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@iki.fi> | 2011-01-07 17:20:37 +0200 |
| commit | d2ef05bb44e044e30f779ed9c4882c3c8299350d (patch) | |
| tree | 03c6406f1afefc72e7cefa3cc5efa589d923122d | |
| parent | c727f47d59641c43ce171126232fd8049296adf6 (diff) | |
| download | qemu-d2ef05bb44e044e30f779ed9c4882c3c8299350d.zip qemu-d2ef05bb44e044e30f779ed9c4882c3c8299350d.tar.gz qemu-d2ef05bb44e044e30f779ed9c4882c3c8299350d.tar.bz2 | |
linux-user: Support ioctls whose parameter size is not constant
Some ioctls (for example FS_IOC_FIEMAP) use structures whose size is
not constant. The generic argument conversion code in do_ioctl()
cannot handle this, so add support for implementing a special-case
handler for a particular ioctl which does the conversion itself.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
| -rw-r--r-- | linux-user/syscall.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 1939a5f..970efe3 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -2965,13 +2965,19 @@ enum { #undef STRUCT #undef STRUCT_SPECIAL -typedef struct IOCTLEntry { +typedef struct IOCTLEntry IOCTLEntry; + +typedef abi_long do_ioctl_fn(const IOCTLEntry *ie, uint8_t *buf_temp, + int fd, abi_long cmd, abi_long arg); + +struct IOCTLEntry { unsigned int target_cmd; unsigned int host_cmd; const char *name; int access; + do_ioctl_fn *do_ioctl; const argtype arg_type[5]; -} IOCTLEntry; +}; #define IOC_R 0x0001 #define IOC_W 0x0002 @@ -2981,7 +2987,9 @@ typedef struct IOCTLEntry { static IOCTLEntry ioctl_entries[] = { #define IOCTL(cmd, access, ...) \ - { TARGET_ ## cmd, cmd, #cmd, access, { __VA_ARGS__ } }, + { TARGET_ ## cmd, cmd, #cmd, access, 0, { __VA_ARGS__ } }, +#define IOCTL_SPECIAL(cmd, access, dofn, ...) \ + { TARGET_ ## cmd, cmd, #cmd, access, dofn, { __VA_ARGS__ } }, #include "ioctls.h" { 0, 0, }, }; @@ -3011,6 +3019,10 @@ static abi_long do_ioctl(int fd, abi_long cmd, abi_long arg) #if defined(DEBUG) gemu_log("ioctl: cmd=0x%04lx (%s)\n", (long)cmd, ie->name); #endif + if (ie->do_ioctl) { + return ie->do_ioctl(ie, buf_temp, fd, cmd, arg); + } + switch(arg_type[0]) { case TYPE_NULL: /* no argument */ |