| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Preserved registers that are shared between code in ivt.S and |
| 4 | * entry.S. Be careful not to step on these! |
| 5 | */ |
| 6 | #define PRED_LEAVE_SYSCALL 1 /* TRUE iff leave from syscall */ |
| 7 | #define PRED_KERNEL_STACK 2 /* returning to kernel-stacks? */ |
| 8 | #define PRED_USER_STACK 3 /* returning to user-stacks? */ |
| 9 | #define PRED_SYSCALL 4 /* inside a system call? */ |
| 10 | #define PRED_NON_SYSCALL 5 /* complement of PRED_SYSCALL */ |
| 11 | |
| 12 | #ifdef __ASSEMBLY__ |
| 13 | # define PASTE2(x,y) x##y |
| 14 | # define PASTE(x,y) PASTE2(x,y) |
| 15 | |
| 16 | # define pLvSys PASTE(p,PRED_LEAVE_SYSCALL) |
| 17 | # define pKStk PASTE(p,PRED_KERNEL_STACK) |
| 18 | # define pUStk PASTE(p,PRED_USER_STACK) |
| 19 | # define pSys PASTE(p,PRED_SYSCALL) |
| 20 | # define pNonSys PASTE(p,PRED_NON_SYSCALL) |
| 21 | #endif |
| 22 | |
| 23 | #define PT(f) (IA64_PT_REGS_##f##_OFFSET) |
| 24 | #define SW(f) (IA64_SWITCH_STACK_##f##_OFFSET) |
| Keith Owens | d270acb | 2006-04-07 18:08:11 +1000 | [diff] [blame] | 25 | #define SOS(f) (IA64_SAL_OS_STATE_##f##_OFFSET) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #define PT_REGS_SAVES(off) \ |
| 28 | .unwabi 3, 'i'; \ |
| 29 | .fframe IA64_PT_REGS_SIZE+16+(off); \ |
| 30 | .spillsp rp, PT(CR_IIP)+16+(off); \ |
| 31 | .spillsp ar.pfs, PT(CR_IFS)+16+(off); \ |
| 32 | .spillsp ar.unat, PT(AR_UNAT)+16+(off); \ |
| 33 | .spillsp ar.fpsr, PT(AR_FPSR)+16+(off); \ |
| 34 | .spillsp pr, PT(PR)+16+(off); |
| 35 | |
| 36 | #define PT_REGS_UNWIND_INFO(off) \ |
| 37 | .prologue; \ |
| 38 | PT_REGS_SAVES(off); \ |
| 39 | .body |
| 40 | |
| 41 | #define SWITCH_STACK_SAVES(off) \ |
| 42 | .savesp ar.unat,SW(CALLER_UNAT)+16+(off); \ |
| 43 | .savesp ar.fpsr,SW(AR_FPSR)+16+(off); \ |
| 44 | .spillsp f2,SW(F2)+16+(off); .spillsp f3,SW(F3)+16+(off); \ |
| 45 | .spillsp f4,SW(F4)+16+(off); .spillsp f5,SW(F5)+16+(off); \ |
| 46 | .spillsp f16,SW(F16)+16+(off); .spillsp f17,SW(F17)+16+(off); \ |
| 47 | .spillsp f18,SW(F18)+16+(off); .spillsp f19,SW(F19)+16+(off); \ |
| 48 | .spillsp f20,SW(F20)+16+(off); .spillsp f21,SW(F21)+16+(off); \ |
| 49 | .spillsp f22,SW(F22)+16+(off); .spillsp f23,SW(F23)+16+(off); \ |
| 50 | .spillsp f24,SW(F24)+16+(off); .spillsp f25,SW(F25)+16+(off); \ |
| 51 | .spillsp f26,SW(F26)+16+(off); .spillsp f27,SW(F27)+16+(off); \ |
| 52 | .spillsp f28,SW(F28)+16+(off); .spillsp f29,SW(F29)+16+(off); \ |
| 53 | .spillsp f30,SW(F30)+16+(off); .spillsp f31,SW(F31)+16+(off); \ |
| 54 | .spillsp r4,SW(R4)+16+(off); .spillsp r5,SW(R5)+16+(off); \ |
| 55 | .spillsp r6,SW(R6)+16+(off); .spillsp r7,SW(R7)+16+(off); \ |
| 56 | .spillsp b0,SW(B0)+16+(off); .spillsp b1,SW(B1)+16+(off); \ |
| 57 | .spillsp b2,SW(B2)+16+(off); .spillsp b3,SW(B3)+16+(off); \ |
| 58 | .spillsp b4,SW(B4)+16+(off); .spillsp b5,SW(B5)+16+(off); \ |
| 59 | .spillsp ar.pfs,SW(AR_PFS)+16+(off); .spillsp ar.lc,SW(AR_LC)+16+(off); \ |
| 60 | .spillsp @priunat,SW(AR_UNAT)+16+(off); \ |
| 61 | .spillsp ar.rnat,SW(AR_RNAT)+16+(off); \ |
| 62 | .spillsp ar.bspstore,SW(AR_BSPSTORE)+16+(off); \ |
| David Mosberger-Tang | 34b727c | 2005-06-09 22:36:00 -0700 | [diff] [blame] | 63 | .spillsp pr,SW(PR)+16+(off) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | #define DO_SAVE_SWITCH_STACK \ |
| 66 | movl r28=1f; \ |
| 67 | ;; \ |
| 68 | .fframe IA64_SWITCH_STACK_SIZE; \ |
| 69 | adds sp=-IA64_SWITCH_STACK_SIZE,sp; \ |
| 70 | mov.ret.sptk b7=r28,1f; \ |
| 71 | SWITCH_STACK_SAVES(0); \ |
| 72 | br.cond.sptk.many save_switch_stack; \ |
| 73 | 1: |
| 74 | |
| 75 | #define DO_LOAD_SWITCH_STACK \ |
| 76 | movl r28=1f; \ |
| 77 | ;; \ |
| 78 | invala; \ |
| 79 | mov.ret.sptk b7=r28,1f; \ |
| 80 | br.cond.sptk.many load_switch_stack; \ |
| 81 | 1: .restore sp; \ |
| 82 | adds sp=IA64_SWITCH_STACK_SIZE,sp |