| entry_32.S (cc9263874b42bf98209dce0afe698b550648e770) | entry_32.S (0100301bfdf56a2a370c7157b5ab0fbf9313e1cd) |
|---|---|
| 1/* 2 * Copyright (C) 1991,1992 Linus Torvalds 3 * 4 * entry_32.S contains the system-call and low-level fault and trap handling routines. 5 * 6 * Stack layout while running C code: 7 * ptrace needs to have all registers on the stack. 8 * If the order here is changed, it needs to be --- 190 unchanged lines hidden (view full) --- 199 jmp 3b 200.popsection 201 _ASM_EXTABLE(1b, 4b) 202 _ASM_EXTABLE(2b, 5b) 203 _ASM_EXTABLE(3b, 6b) 204 POP_GS_EX 205.endm 206 | 1/* 2 * Copyright (C) 1991,1992 Linus Torvalds 3 * 4 * entry_32.S contains the system-call and low-level fault and trap handling routines. 5 * 6 * Stack layout while running C code: 7 * ptrace needs to have all registers on the stack. 8 * If the order here is changed, it needs to be --- 190 unchanged lines hidden (view full) --- 199 jmp 3b 200.popsection 201 _ASM_EXTABLE(1b, 4b) 202 _ASM_EXTABLE(2b, 5b) 203 _ASM_EXTABLE(3b, 6b) 204 POP_GS_EX 205.endm 206 |
| 207/* 208 * %eax: prev task 209 * %edx: next task 210 */ 211ENTRY(__switch_to_asm) 212 /* 213 * Save callee-saved registers 214 * This must match the order in struct inactive_task_frame 215 */ 216 pushl %ebp 217 pushl %ebx 218 pushl %edi 219 pushl %esi 220 221 /* switch stack */ 222 movl %esp, TASK_threadsp(%eax) 223 movl TASK_threadsp(%edx), %esp 224 225#ifdef CONFIG_CC_STACKPROTECTOR 226 movl TASK_stack_canary(%edx), %ebx 227 movl %ebx, PER_CPU_VAR(stack_canary)+stack_canary_offset 228#endif 229 230 /* restore callee-saved registers */ 231 popl %esi 232 popl %edi 233 popl %ebx 234 popl %ebp 235 236 jmp __switch_to 237END(__switch_to_asm) 238 239/* 240 * A newly forked process directly context switches into this address. 241 * 242 * eax: prev task we switched from 243 */ |
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| 207ENTRY(ret_from_fork) 208 pushl %eax 209 call schedule_tail 210 popl %eax 211 212 /* When we fork, we trace the syscall return in the child, too. */ 213 movl %esp, %eax 214 call syscall_return_slowpath --- 952 unchanged lines hidden --- | 244ENTRY(ret_from_fork) 245 pushl %eax 246 call schedule_tail 247 popl %eax 248 249 /* When we fork, we trace the syscall return in the child, too. */ 250 movl %esp, %eax 251 call syscall_return_slowpath --- 952 unchanged lines hidden --- |