1 // SPDX-License-Identifier: GPL-2.0
2 /*---------------------------------------------------------------------------+
9  |                       Australia.  E-mail   billm@suburbia.net             |
12  +---------------------------------------------------------------------------*/
14 /*---------------------------------------------------------------------------+
19  +---------------------------------------------------------------------------*/
43 #define REG_(x) (*(long *)(reg_offset[(x)] + (u_char *)FPU_info->regs))
55 #define VM86_REG_(x) (*(unsigned short *) \
56 		(reg_offset_vm86[((unsigned)x)] + (u_char *)FPU_info->regs))
68 #define PM_REG_(x) (*(unsigned short *) \
69 		(reg_offset_pm[((unsigned)x)] + (u_char *)FPU_info->regs))
93 		/* A non-zero ss is illegal */  in sib()
125 	segment--;  in vm86_segment()
132 	addr->selector = VM86_REG_(segment);  in vm86_segment()
140 	struct desc_struct descriptor;  in pm_address()  local
143 	segment--;  in pm_address()
154 	case PREFIX_GS_ - 1:  in pm_address()
156 		savesegment(gs, addr->selector);  in pm_address()
159 		addr->selector = PM_REG_(segment);  in pm_address()
162 	descriptor = FPU_get_ldt_descriptor(addr->selector);  in pm_address()
163 	base_address = seg_get_base(&descriptor);  in pm_address()
165 	limit = seg_get_limit(&descriptor) + 1;  in pm_address()
166 	limit *= seg_get_granularity(&descriptor);  in pm_address()
167 	limit += base_address - 1;  in pm_address()
171 	if (seg_expands_down(&descriptor)) {  in pm_address()
172 		if (descriptor.g) {  in pm_address()
181 		    ((seg_top - address) >= 255 ? 255 : seg_top - address);  in pm_address()
185 		    ((limit - address) >= 254 ? 255 : limit - address + 1);  in pm_address()
187 	if (seg_execute_only(&descriptor) ||  in pm_address()
188 	    (!seg_writable(&descriptor) && (FPU_modrm & FPU_WRITE_BIT))) {  in pm_address()
219 	   in `non-segmented' 32 bit protected mode. */  in FPU_get_address()
225 	addr->selector = FPU_DS;	/* Default, for 32 bit non-segmented mode. */  in FPU_get_address()
244 				addr->offset = address;  in FPU_get_address()
249 				addr->offset = address;  in FPU_get_address()
275 	addr->offset = address;  in FPU_get_address()
303 	   in `non-segmented' 32 bit protected mode. */  in FPU_get_address_16()
309 	addr->selector = FPU_DS;	/* Default, for 32 bit non-segmented mode. */  in FPU_get_address_16()
320 				     (unsigned short __user *)(*fpu_eip));  in FPU_get_address_16()
338 		FPU_get_user(address, (unsigned short __user *)(*fpu_eip));  in FPU_get_address_16()
349 		address += FPU_info->regs->bx + FPU_info->regs->si;  in FPU_get_address_16()
352 		address += FPU_info->regs->bx + FPU_info->regs->di;  in FPU_get_address_16()
355 		address += FPU_info->regs->bp + FPU_info->regs->si;  in FPU_get_address_16()
360 		address += FPU_info->regs->bp + FPU_info->regs->di;  in FPU_get_address_16()
365 		address += FPU_info->regs->si;  in FPU_get_address_16()
368 		address += FPU_info->regs->di;  in FPU_get_address_16()
371 		address += FPU_info->regs->bp;  in FPU_get_address_16()
376 		address += FPU_info->regs->bx;  in FPU_get_address_16()
383 	addr->offset = address;  in FPU_get_address_16()