| entry_32.S (9f4813b531a0b8cc502fcfb142937fe4e9104d77) | entry_32.S (81ff2c37f9e5d77593928df0536d86443195fd64) |
|---|---|
| 1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 1991,1992 Linus Torvalds 4 * 5 * entry_32.S contains the system-call and low-level fault and trap handling routines. 6 * 7 * Stack layout while running C code: 8 * ptrace needs to have all registers on the stack. --- 158 unchanged lines hidden (view full) --- 167.Lend_\@: 168.endm 169 170.macro BUG_IF_WRONG_CR3 no_user_check=0 171#ifdef CONFIG_DEBUG_ENTRY 172 ALTERNATIVE "jmp .Lend_\@", "", X86_FEATURE_PTI 173 .if \no_user_check == 0 174 /* coming from usermode? */ | 1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 1991,1992 Linus Torvalds 4 * 5 * entry_32.S contains the system-call and low-level fault and trap handling routines. 6 * 7 * Stack layout while running C code: 8 * ptrace needs to have all registers on the stack. --- 158 unchanged lines hidden (view full) --- 167.Lend_\@: 168.endm 169 170.macro BUG_IF_WRONG_CR3 no_user_check=0 171#ifdef CONFIG_DEBUG_ENTRY 172 ALTERNATIVE "jmp .Lend_\@", "", X86_FEATURE_PTI 173 .if \no_user_check == 0 174 /* coming from usermode? */ |
| 175 testl $SEGMENT_RPL_MASK, PT_CS(%esp) | 175 testl $USER_SEGMENT_RPL_MASK, PT_CS(%esp) |
| 176 jz .Lend_\@ 177 .endif 178 /* On user-cr3? */ 179 movl %cr3, %eax 180 testl $PTI_SWITCH_MASK, %eax 181 jnz .Lend_\@ 182 /* From userspace with kernel cr3 - BUG */ 183 ud2 --- 28 unchanged lines hidden (view full) --- 212 * Clear them in case hardware didn't do this for us. 213 */ 214 andl $0x0000ffff, 3*4(%esp) 215 216#ifdef CONFIG_VM86 217 testl $X86_EFLAGS_VM, 4*4(%esp) 218 jnz .Lfrom_usermode_no_fixup_\@ 219#endif | 176 jz .Lend_\@ 177 .endif 178 /* On user-cr3? */ 179 movl %cr3, %eax 180 testl $PTI_SWITCH_MASK, %eax 181 jnz .Lend_\@ 182 /* From userspace with kernel cr3 - BUG */ 183 ud2 --- 28 unchanged lines hidden (view full) --- 212 * Clear them in case hardware didn't do this for us. 213 */ 214 andl $0x0000ffff, 3*4(%esp) 215 216#ifdef CONFIG_VM86 217 testl $X86_EFLAGS_VM, 4*4(%esp) 218 jnz .Lfrom_usermode_no_fixup_\@ 219#endif |
| 220 testl $SEGMENT_RPL_MASK, 3*4(%esp) | 220 testl $USER_SEGMENT_RPL_MASK, 3*4(%esp) |
| 221 jnz .Lfrom_usermode_no_fixup_\@ 222 223 orl $CS_FROM_KERNEL, 3*4(%esp) 224 225 /* 226 * When we're here from kernel mode; the (exception) stack looks like: 227 * 228 * 5*4(%esp) - <previous context> --- 1388 unchanged lines hidden --- | 221 jnz .Lfrom_usermode_no_fixup_\@ 222 223 orl $CS_FROM_KERNEL, 3*4(%esp) 224 225 /* 226 * When we're here from kernel mode; the (exception) stack looks like: 227 * 228 * 5*4(%esp) - <previous context> --- 1388 unchanged lines hidden --- |