| entry.S (777537905744c28b02c283692e7f75f5445c1afa) | entry.S (b1d70c62fff3e8b6224699801c610c244882685a) |
|---|---|
| 1/* 2 * Low-level system-call handling, trap handlers and context-switching 3 * 4 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 5 * Copyright (C) 2008-2009 PetaLogix 6 * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au> 7 * Copyright (C) 2001,2002 NEC Corporation 8 * Copyright (C) 2001,2002 Miles Bader <miles@gnu.org> --- 291 unchanged lines hidden (view full) --- 300 addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ 301 SAVE_REGS 302 303 swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ 304 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); 305 swi r11, r1, PTO+PT_R1; /* Store user SP. */ 306 addi r11, r0, 1; 307 swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ | 1/* 2 * Low-level system-call handling, trap handlers and context-switching 3 * 4 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 5 * Copyright (C) 2008-2009 PetaLogix 6 * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au> 7 * Copyright (C) 2001,2002 NEC Corporation 8 * Copyright (C) 2001,2002 Miles Bader <miles@gnu.org> --- 291 unchanged lines hidden (view full) --- 300 addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ 301 SAVE_REGS 302 303 swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ 304 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); 305 swi r11, r1, PTO+PT_R1; /* Store user SP. */ 306 addi r11, r0, 1; 307 swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ |
| 3082: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ | 3082: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); |
| 309 /* Save away the syscall number. */ 310 swi r12, r1, PTO+PT_R0; 311 tovirt(r1,r1) 312 313/* where the trap should return need -8 to adjust for rtsd r15, 8*/ 314/* Jump to the appropriate function for the system call number in r12 315 * (r12 is not preserved), or return an error if r12 is not valid. The LP 316 * register should point to the location where 317 * the called function should return. [note that MAKE_SYS_CALL uses label 1] */ 318 319 # Step into virtual mode. 320 set_vms; 321 addik r11, r0, 3f 322 rtid r11, 0 323 nop 3243: | 309 /* Save away the syscall number. */ 310 swi r12, r1, PTO+PT_R0; 311 tovirt(r1,r1) 312 313/* where the trap should return need -8 to adjust for rtsd r15, 8*/ 314/* Jump to the appropriate function for the system call number in r12 315 * (r12 is not preserved), or return an error if r12 is not valid. The LP 316 * register should point to the location where 317 * the called function should return. [note that MAKE_SYS_CALL uses label 1] */ 318 319 # Step into virtual mode. 320 set_vms; 321 addik r11, r0, 3f 322 rtid r11, 0 323 nop 3243: |
| 325 add r11, r0, CURRENT_TASK /* Get current task ptr into r11 */ 326 lwi r11, r11, TS_THREAD_INFO /* get thread info */ | 325 lwi r11, CURRENT_TASK, TS_THREAD_INFO /* get thread info */ |
| 327 lwi r11, r11, TI_FLAGS /* get flags in thread info */ 328 andi r11, r11, _TIF_WORK_SYSCALL_MASK 329 beqi r11, 4f 330 331 addik r3, r0, -ENOSYS 332 swi r3, r1, PTO + PT_R3 333 brlid r15, do_syscall_trace_enter 334 addik r5, r1, PTO + PT_R0 --- 42 unchanged lines hidden (view full) --- 377/* Entry point used to return from a syscall/trap */ 378/* We re-enable BIP bit before state restore */ 379C_ENTRY(ret_from_trap): 380 set_bip; /* Ints masked for state restore*/ 381 lwi r11, r1, PTO+PT_MODE; 382/* See if returning to kernel mode, if so, skip resched &c. */ 383 bnei r11, 2f; 384 | 326 lwi r11, r11, TI_FLAGS /* get flags in thread info */ 327 andi r11, r11, _TIF_WORK_SYSCALL_MASK 328 beqi r11, 4f 329 330 addik r3, r0, -ENOSYS 331 swi r3, r1, PTO + PT_R3 332 brlid r15, do_syscall_trace_enter 333 addik r5, r1, PTO + PT_R0 --- 42 unchanged lines hidden (view full) --- 376/* Entry point used to return from a syscall/trap */ 377/* We re-enable BIP bit before state restore */ 378C_ENTRY(ret_from_trap): 379 set_bip; /* Ints masked for state restore*/ 380 lwi r11, r1, PTO+PT_MODE; 381/* See if returning to kernel mode, if so, skip resched &c. */ 382 bnei r11, 2f; 383 |
| 384 swi r3, r1, PTO + PT_R3 385 swi r4, r1, PTO + PT_R4 386 |
|
| 385 /* We're returning to user mode, so check for various conditions that 386 * trigger rescheduling. */ | 387 /* We're returning to user mode, so check for various conditions that 388 * trigger rescheduling. */ |
| 387 # FIXME: Restructure all these flag checks. 388 add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 389 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 389 /* FIXME: Restructure all these flag checks. */ 390 lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ |
| 390 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 391 andi r11, r11, _TIF_WORK_SYSCALL_MASK 392 beqi r11, 1f 393 | 391 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 392 andi r11, r11, _TIF_WORK_SYSCALL_MASK 393 beqi r11, 1f 394 |
| 394 swi r3, r1, PTO + PT_R3 395 swi r4, r1, PTO + PT_R4 | |
| 396 brlid r15, do_syscall_trace_leave 397 addik r5, r1, PTO + PT_R0 | 395 brlid r15, do_syscall_trace_leave 396 addik r5, r1, PTO + PT_R0 |
| 398 lwi r3, r1, PTO + PT_R3 399 lwi r4, r1, PTO + PT_R4 | |
| 4001: | 3971: |
| 401 | |
| 402 /* We're returning to user mode, so check for various conditions that 403 * trigger rescheduling. */ | 398 /* We're returning to user mode, so check for various conditions that 399 * trigger rescheduling. */ |
| 404 /* Get current task ptr into r11 */ 405 add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 406 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 400 /* get thread info from current task */ 401 lwi r11, CURRENT_TASK, TS_THREAD_INFO; |
| 407 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 408 andi r11, r11, _TIF_NEED_RESCHED; 409 beqi r11, 5f; 410 | 402 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 403 andi r11, r11, _TIF_NEED_RESCHED; 404 beqi r11, 5f; 405 |
| 411 swi r3, r1, PTO + PT_R3; /* store syscall result */ 412 swi r4, r1, PTO + PT_R4; | |
| 413 bralid r15, schedule; /* Call scheduler */ 414 nop; /* delay slot */ | 406 bralid r15, schedule; /* Call scheduler */ 407 nop; /* delay slot */ |
| 415 lwi r3, r1, PTO + PT_R3; /* restore syscall result */ 416 lwi r4, r1, PTO + PT_R4; | |
| 417 418 /* Maybe handle a signal */ | 408 409 /* Maybe handle a signal */ |
| 4195: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 420 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 4105: /* get thread info from current task*/ 411 lwi r11, CURRENT_TASK, TS_THREAD_INFO; |
| 421 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 422 andi r11, r11, _TIF_SIGPENDING; 423 beqi r11, 1f; /* Signals to handle, handle them */ 424 | 412 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 413 andi r11, r11, _TIF_SIGPENDING; 414 beqi r11, 1f; /* Signals to handle, handle them */ 415 |
| 425 swi r3, r1, PTO + PT_R3; /* store syscall result */ 426 swi r4, r1, PTO + PT_R4; | |
| 427 la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ 428 add r6, r0, r0; /* Arg 2: sigset_t *oldset */ 429 addi r7, r0, 1; /* Arg 3: int in_syscall */ 430 bralid r15, do_signal; /* Handle any signals */ 431 nop; | 416 la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ 417 add r6, r0, r0; /* Arg 2: sigset_t *oldset */ 418 addi r7, r0, 1; /* Arg 3: int in_syscall */ 419 bralid r15, do_signal; /* Handle any signals */ 420 nop; |
| 421 422/* Finally, return to user state. */ 4231: |
|
| 432 lwi r3, r1, PTO + PT_R3; /* restore syscall result */ 433 lwi r4, r1, PTO + PT_R4; 434 | 424 lwi r3, r1, PTO + PT_R3; /* restore syscall result */ 425 lwi r4, r1, PTO + PT_R4; 426 |
| 435/* Finally, return to user state. */ 4361: swi r0, r0, PER_CPU(KM); /* Now officially in user state. */ | 427 swi r0, r0, PER_CPU(KM); /* Now officially in user state. */ |
| 437 add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 438 swi r11, r0, PER_CPU(CURRENT_SAVE); /* save current */ 439 VM_OFF; 440 tophys(r1,r1); 441 RESTORE_REGS; 442 addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ 443 lwi r1, r1, PT_R1 - PT_SIZE;/* Restore user stack pointer. */ 444 bri 6f; --- 115 unchanged lines hidden (view full) --- 560 /* PC, before IRQ/trap - this is one instruction above FIXME*/ \ 561 swi r17, r1, PTO+PT_PC; \ 562 \ 563 swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ \ 564 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \ 565 swi r11, r1, PTO+PT_R1; /* Store user SP. */ \ 566 addi r11, r0, 1; \ 567 swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode.*/\ | 428 add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 429 swi r11, r0, PER_CPU(CURRENT_SAVE); /* save current */ 430 VM_OFF; 431 tophys(r1,r1); 432 RESTORE_REGS; 433 addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ 434 lwi r1, r1, PT_R1 - PT_SIZE;/* Restore user stack pointer. */ 435 bri 6f; --- 115 unchanged lines hidden (view full) --- 551 /* PC, before IRQ/trap - this is one instruction above FIXME*/ \ 552 swi r17, r1, PTO+PT_PC; \ 553 \ 554 swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ \ 555 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \ 556 swi r11, r1, PTO+PT_R1; /* Store user SP. */ \ 557 addi r11, r0, 1; \ 558 swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode.*/\ |
| 5682: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\ | 5592: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); \ |
| 569 /* Save away the syscall number. */ \ 570 swi r0, r1, PTO+PT_R0; \ 571 tovirt(r1,r1) 572 573C_ENTRY(full_exception_trap): 574 swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */ 575 /* adjust exception address for privileged instruction 576 * for finding where is it */ --- 91 unchanged lines hidden (view full) --- 668C_ENTRY(ret_from_exc): 669 set_bip; /* Ints masked for state restore*/ 670 lwi r11, r1, PTO+PT_MODE; 671 bnei r11, 2f; /* See if returning to kernel mode, */ 672 /* ... if so, skip resched &c. */ 673 674 /* We're returning to user mode, so check for various conditions that 675 trigger rescheduling. */ | 560 /* Save away the syscall number. */ \ 561 swi r0, r1, PTO+PT_R0; \ 562 tovirt(r1,r1) 563 564C_ENTRY(full_exception_trap): 565 swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */ 566 /* adjust exception address for privileged instruction 567 * for finding where is it */ --- 91 unchanged lines hidden (view full) --- 659C_ENTRY(ret_from_exc): 660 set_bip; /* Ints masked for state restore*/ 661 lwi r11, r1, PTO+PT_MODE; 662 bnei r11, 2f; /* See if returning to kernel mode, */ 663 /* ... if so, skip resched &c. */ 664 665 /* We're returning to user mode, so check for various conditions that 666 trigger rescheduling. */ |
| 676 /* Get current task ptr into r11 */ 677 add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 678 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 667 lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ |
| 679 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 680 andi r11, r11, _TIF_NEED_RESCHED; 681 beqi r11, 5f; 682 683/* Call the scheduler before returning from a syscall/trap. */ 684 bralid r15, schedule; /* Call scheduler */ 685 nop; /* delay slot */ 686 687 /* Maybe handle a signal */ | 668 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 669 andi r11, r11, _TIF_NEED_RESCHED; 670 beqi r11, 5f; 671 672/* Call the scheduler before returning from a syscall/trap. */ 673 bralid r15, schedule; /* Call scheduler */ 674 nop; /* delay slot */ 675 676 /* Maybe handle a signal */ |
| 6885: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 689 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 6775: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ |
| 690 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 691 andi r11, r11, _TIF_SIGPENDING; 692 beqi r11, 1f; /* Signals to handle, handle them */ 693 694 /* 695 * Handle a signal return; Pending signals should be in r18. 696 * 697 * Not all registers are saved by the normal trap/interrupt entry --- 99 unchanged lines hidden (view full) --- 797 swi r0, r1, PTO + PT_MODE; 798 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); 799 swi r11, r1, PTO+PT_R1; 800 /* setup kernel mode to KM */ 801 addi r11, r0, 1; 802 swi r11, r0, TOPHYS(PER_CPU(KM)); 803 8042: | 678 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 679 andi r11, r11, _TIF_SIGPENDING; 680 beqi r11, 1f; /* Signals to handle, handle them */ 681 682 /* 683 * Handle a signal return; Pending signals should be in r18. 684 * 685 * Not all registers are saved by the normal trap/interrupt entry --- 99 unchanged lines hidden (view full) --- 785 swi r0, r1, PTO + PT_MODE; 786 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); 787 swi r11, r1, PTO+PT_R1; 788 /* setup kernel mode to KM */ 789 addi r11, r0, 1; 790 swi r11, r0, TOPHYS(PER_CPU(KM)); 791 7922: |
| 805 lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); | 793 lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); |
| 806 swi r0, r1, PTO + PT_R0; 807 tovirt(r1,r1) 808 la r5, r1, PTO; 809 set_vms; 810 la r11, r0, do_IRQ; 811 la r15, r0, irq_call; 812irq_call:rtbd r11, 0; 813 nop; 814 815/* MS: we are in virtual mode */ 816ret_from_irq: 817 lwi r11, r1, PTO + PT_MODE; 818 bnei r11, 2f; 819 | 794 swi r0, r1, PTO + PT_R0; 795 tovirt(r1,r1) 796 la r5, r1, PTO; 797 set_vms; 798 la r11, r0, do_IRQ; 799 la r15, r0, irq_call; 800irq_call:rtbd r11, 0; 801 nop; 802 803/* MS: we are in virtual mode */ 804ret_from_irq: 805 lwi r11, r1, PTO + PT_MODE; 806 bnei r11, 2f; 807 |
| 820 add r11, r0, CURRENT_TASK; 821 lwi r11, r11, TS_THREAD_INFO; | 808 lwi r11, CURRENT_TASK, TS_THREAD_INFO; |
| 822 lwi r11, r11, TI_FLAGS; /* MS: get flags from thread info */ 823 andi r11, r11, _TIF_NEED_RESCHED; 824 beqi r11, 5f 825 bralid r15, schedule; 826 nop; /* delay slot */ 827 828 /* Maybe handle a signal */ | 809 lwi r11, r11, TI_FLAGS; /* MS: get flags from thread info */ 810 andi r11, r11, _TIF_NEED_RESCHED; 811 beqi r11, 5f 812 bralid r15, schedule; 813 nop; /* delay slot */ 814 815 /* Maybe handle a signal */ |
| 8295: add r11, r0, CURRENT_TASK; 830 lwi r11, r11, TS_THREAD_INFO; /* MS: get thread info */ | 8165: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* MS: get thread info */ |
| 831 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 832 andi r11, r11, _TIF_SIGPENDING; 833 beqid r11, no_intr_resched 834/* Handle a signal return; Pending signals should be in r18. */ 835 addi r7, r0, 0; /* Arg 3: int in_syscall */ 836 la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ 837 bralid r15, do_signal; /* Handle any signals */ 838 add r6, r0, r0; /* Arg 2: sigset_t *oldset */ --- 11 unchanged lines hidden (view full) --- 850 lwi r4, r1, PTO + PT_R4; 851 RESTORE_REGS 852 addik r1, r1, STATE_SAVE_SIZE /* MS: Clean up stack space. */ 853 lwi r1, r1, PT_R1 - PT_SIZE; 854 bri 6f; 855/* MS: Return to kernel state. */ 8562: 857#ifdef CONFIG_PREEMPT | 817 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 818 andi r11, r11, _TIF_SIGPENDING; 819 beqid r11, no_intr_resched 820/* Handle a signal return; Pending signals should be in r18. */ 821 addi r7, r0, 0; /* Arg 3: int in_syscall */ 822 la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ 823 bralid r15, do_signal; /* Handle any signals */ 824 add r6, r0, r0; /* Arg 2: sigset_t *oldset */ --- 11 unchanged lines hidden (view full) --- 836 lwi r4, r1, PTO + PT_R4; 837 RESTORE_REGS 838 addik r1, r1, STATE_SAVE_SIZE /* MS: Clean up stack space. */ 839 lwi r1, r1, PT_R1 - PT_SIZE; 840 bri 6f; 841/* MS: Return to kernel state. */ 8422: 843#ifdef CONFIG_PREEMPT |
| 858 add r11, r0, CURRENT_TASK; 859 lwi r11, r11, TS_THREAD_INFO; | 844 lwi r11, CURRENT_TASK, TS_THREAD_INFO; |
| 860 /* MS: get preempt_count from thread info */ 861 lwi r5, r11, TI_PREEMPT_COUNT; 862 bgti r5, restore; 863 864 lwi r5, r11, TI_FLAGS; /* get flags in thread info */ 865 andi r5, r5, _TIF_NEED_RESCHED; 866 beqi r5, restore /* if zero jump over */ 867 868preempt: 869 /* interrupts are off that's why I am calling preempt_chedule_irq */ 870 bralid r15, preempt_schedule_irq 871 nop | 845 /* MS: get preempt_count from thread info */ 846 lwi r5, r11, TI_PREEMPT_COUNT; 847 bgti r5, restore; 848 849 lwi r5, r11, TI_FLAGS; /* get flags in thread info */ 850 andi r5, r5, _TIF_NEED_RESCHED; 851 beqi r5, restore /* if zero jump over */ 852 853preempt: 854 /* interrupts are off that's why I am calling preempt_chedule_irq */ 855 bralid r15, preempt_schedule_irq 856 nop |
| 872 add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 873 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 857 lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ |
| 874 lwi r5, r11, TI_FLAGS; /* get flags in thread info */ 875 andi r5, r5, _TIF_NEED_RESCHED; 876 bnei r5, preempt /* if non zero jump to resched */ 877restore: 878#endif 879 VM_OFF /* MS: turn off MMU */ 880 tophys(r1,r1) 881 lwi r3, r1, PTO + PT_R3; /* MS: restore saved r3, r4 registers */ --- 51 unchanged lines hidden (view full) --- 933 swi r4, r1, PTO + PT_R4; 934 SAVE_REGS; 935 936 swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ 937 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); 938 swi r11, r1, PTO+PT_R1; /* Store user SP. */ 939 addi r11, r0, 1; 940 swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ | 858 lwi r5, r11, TI_FLAGS; /* get flags in thread info */ 859 andi r5, r5, _TIF_NEED_RESCHED; 860 bnei r5, preempt /* if non zero jump to resched */ 861restore: 862#endif 863 VM_OFF /* MS: turn off MMU */ 864 tophys(r1,r1) 865 lwi r3, r1, PTO + PT_R3; /* MS: restore saved r3, r4 registers */ --- 51 unchanged lines hidden (view full) --- 917 swi r4, r1, PTO + PT_R4; 918 SAVE_REGS; 919 920 swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ 921 lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); 922 swi r11, r1, PTO+PT_R1; /* Store user SP. */ 923 addi r11, r0, 1; 924 swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ |
| 9412: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ | 9252: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); |
| 942 /* Save away the syscall number. */ 943 swi r0, r1, PTO+PT_R0; 944 tovirt(r1,r1) 945 946 addi r5, r0, SIGTRAP /* send the trap signal */ 947 add r6, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 948 addk r7, r0, r0 /* 3rd param zero */ 949 950 set_vms; 951 la r11, r0, send_sig; 952 la r15, r0, dbtrap_call; 953dbtrap_call: rtbd r11, 0; 954 nop; 955 956 set_bip; /* Ints masked for state restore*/ 957 lwi r11, r1, PTO+PT_MODE; 958 bnei r11, 2f; 959 960 /* Get current task ptr into r11 */ | 926 /* Save away the syscall number. */ 927 swi r0, r1, PTO+PT_R0; 928 tovirt(r1,r1) 929 930 addi r5, r0, SIGTRAP /* send the trap signal */ 931 add r6, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 932 addk r7, r0, r0 /* 3rd param zero */ 933 934 set_vms; 935 la r11, r0, send_sig; 936 la r15, r0, dbtrap_call; 937dbtrap_call: rtbd r11, 0; 938 nop; 939 940 set_bip; /* Ints masked for state restore*/ 941 lwi r11, r1, PTO+PT_MODE; 942 bnei r11, 2f; 943 944 /* Get current task ptr into r11 */ |
| 961 add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 962 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 945 lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ |
| 963 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 964 andi r11, r11, _TIF_NEED_RESCHED; 965 beqi r11, 5f; 966 967/* Call the scheduler before returning from a syscall/trap. */ 968 969 bralid r15, schedule; /* Call scheduler */ 970 nop; /* delay slot */ 971 /* XXX Is PT_DTRACE handling needed here? */ 972 /* XXX m68knommu also checks TASK_STATE & TASK_COUNTER here. */ 973 974 /* Maybe handle a signal */ | 946 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 947 andi r11, r11, _TIF_NEED_RESCHED; 948 beqi r11, 5f; 949 950/* Call the scheduler before returning from a syscall/trap. */ 951 952 bralid r15, schedule; /* Call scheduler */ 953 nop; /* delay slot */ 954 /* XXX Is PT_DTRACE handling needed here? */ 955 /* XXX m68knommu also checks TASK_STATE & TASK_COUNTER here. */ 956 957 /* Maybe handle a signal */ |
| 9755: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ 976 lwi r11, r11, TS_THREAD_INFO; /* get thread info */ | 9585: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ |
| 977 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 978 andi r11, r11, _TIF_SIGPENDING; 979 beqi r11, 1f; /* Signals to handle, handle them */ 980 981/* Handle a signal return; Pending signals should be in r18. */ 982 /* Not all registers are saved by the normal trap/interrupt entry 983 points (for instance, call-saved registers (because the normal 984 C-compiler calling sequence in the kernel makes sure they're --- 40 unchanged lines hidden (view full) --- 1025DBTRAP_return: /* Make global symbol for debugging */ 1026 rtbd r14, 0; /* Instructions to return from an IRQ */ 1027 nop; 1028 1029 1030 1031ENTRY(_switch_to) 1032 /* prepare return value */ | 959 lwi r11, r11, TI_FLAGS; /* get flags in thread info */ 960 andi r11, r11, _TIF_SIGPENDING; 961 beqi r11, 1f; /* Signals to handle, handle them */ 962 963/* Handle a signal return; Pending signals should be in r18. */ 964 /* Not all registers are saved by the normal trap/interrupt entry 965 points (for instance, call-saved registers (because the normal 966 C-compiler calling sequence in the kernel makes sure they're --- 40 unchanged lines hidden (view full) --- 1007DBTRAP_return: /* Make global symbol for debugging */ 1008 rtbd r14, 0; /* Instructions to return from an IRQ */ 1009 nop; 1010 1011 1012 1013ENTRY(_switch_to) 1014 /* prepare return value */ |
| 1033 addk r3, r0, r31 | 1015 addk r3, r0, CURRENT_TASK |
| 1034 1035 /* save registers in cpu_context */ 1036 /* use r11 and r12, volatile registers, as temp register */ 1037 /* give start of cpu_context for previous process */ 1038 addik r11, r5, TI_CPU_CONTEXT 1039 swi r1, r11, CC_R1 1040 swi r2, r11, CC_R2 1041 /* skip volatile registers. --- 27 unchanged lines hidden (view full) --- 1069 swi r12, r11, CC_EAR 1070 mfs r12, resr 1071 nop 1072 swi r12, r11, CC_ESR 1073 mfs r12, rfsr 1074 nop 1075 swi r12, r11, CC_FSR 1076 | 1016 1017 /* save registers in cpu_context */ 1018 /* use r11 and r12, volatile registers, as temp register */ 1019 /* give start of cpu_context for previous process */ 1020 addik r11, r5, TI_CPU_CONTEXT 1021 swi r1, r11, CC_R1 1022 swi r2, r11, CC_R2 1023 /* skip volatile registers. --- 27 unchanged lines hidden (view full) --- 1051 swi r12, r11, CC_EAR 1052 mfs r12, resr 1053 nop 1054 swi r12, r11, CC_ESR 1055 mfs r12, rfsr 1056 nop 1057 swi r12, r11, CC_FSR 1058 |
| 1077 /* update r31, the current */ 1078 lwi r31, r6, TI_TASK/* give me pointer to task which will be next */ | 1059 /* update r31, the current-give me pointer to task which will be next */ 1060 lwi CURRENT_TASK, r6, TI_TASK |
| 1079 /* stored it to current_save too */ | 1061 /* stored it to current_save too */ |
| 1080 swi r31, r0, PER_CPU(CURRENT_SAVE) | 1062 swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE) |
| 1081 1082 /* get new process' cpu context and restore */ 1083 /* give me start where start context of next task */ 1084 addik r11, r6, TI_CPU_CONTEXT 1085 1086 /* non-volatile registers */ 1087 lwi r30, r11, CC_R30 1088 lwi r29, r11, CC_R29 --- 66 unchanged lines hidden --- | 1063 1064 /* get new process' cpu context and restore */ 1065 /* give me start where start context of next task */ 1066 addik r11, r6, TI_CPU_CONTEXT 1067 1068 /* non-volatile registers */ 1069 lwi r30, r11, CC_R30 1070 lwi r29, r11, CC_R29 --- 66 unchanged lines hidden --- |