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bsd-user: Add init_bsd_ioctl function

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Add initialization function that registers thunk structures and
patches ioctl table entries with correct size parameters for
target architecture.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
This commit is contained in:
Stacey Son
2026-03-14 11:51:27 -06:00
committed by Warner Losh
parent 40fc417f11
commit 6ed4495110
1 changed files with 42 additions and 0 deletions
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42
bsd-user/bsd-ioctl.c
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@@ -392,3 +392,45 @@ abi_long do_bsd_ioctl(int fd, abi_long cmd, abi_long arg)
}
return ret;
}
void init_bsd_ioctl(void)
{
IOCTLEntry *ie;
const argtype *arg_type;
int size;
thunk_init(STRUCT_MAX);
#define STRUCT(name, ...) \
thunk_register_struct(STRUCT_ ## name, #name, struct_ ## name ## _def);
#define STRUCT_SPECIAL(name) \
thunk_register_struct_direct(STRUCT_ ## name, #name, &struct_ ## name ## _def);
#include "os-ioctl-types.h"
#undef STRUCT
#undef STRUCT_SPECIAL
/*
* Patch the ioctl size if necessary using the fact that no
* ioctl has all the bits at '1' in the size field
* (IOCPARM_MAX - 1).
*/
ie = ioctl_entries;
while (ie->target_cmd != 0) {
if (((ie->target_cmd >> TARGET_IOCPARM_SHIFT) &
TARGET_IOCPARM_MASK) == TARGET_IOCPARM_MASK) {
arg_type = ie->arg_type;
if (arg_type[0] != TYPE_PTR) {
fprintf(stderr, "cannot patch size for ioctl 0x%x\n",
ie->target_cmd);
exit(1);
}
arg_type++;
size = thunk_type_size(arg_type, 0);
ie->target_cmd = (ie->target_cmd &
~(TARGET_IOCPARM_MASK << TARGET_IOCPARM_SHIFT)) |
(size << TARGET_IOCPARM_SHIFT);
}
ie++;
}
}