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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Preserved registers that are shared between code in ivt.S and
- * entry.S. Be careful not to step on these!
- */
- #define PRED_LEAVE_SYSCALL 1 /* TRUE iff leave from syscall */
- #define PRED_KERNEL_STACK 2 /* returning to kernel-stacks? */
- #define PRED_USER_STACK 3 /* returning to user-stacks? */
- #define PRED_SYSCALL 4 /* inside a system call? */
- #define PRED_NON_SYSCALL 5 /* complement of PRED_SYSCALL */
- #ifdef __ASSEMBLY__
- # define PASTE2(x,y) x##y
- # define PASTE(x,y) PASTE2(x,y)
- # define pLvSys PASTE(p,PRED_LEAVE_SYSCALL)
- # define pKStk PASTE(p,PRED_KERNEL_STACK)
- # define pUStk PASTE(p,PRED_USER_STACK)
- # define pSys PASTE(p,PRED_SYSCALL)
- # define pNonSys PASTE(p,PRED_NON_SYSCALL)
- #endif
- #define PT(f) (IA64_PT_REGS_##f##_OFFSET)
- #define SW(f) (IA64_SWITCH_STACK_##f##_OFFSET)
- #define SOS(f) (IA64_SAL_OS_STATE_##f##_OFFSET)
- #define PT_REGS_SAVES(off) \
- .unwabi 3, 'i'; \
- .fframe IA64_PT_REGS_SIZE+16+(off); \
- .spillsp rp, PT(CR_IIP)+16+(off); \
- .spillsp ar.pfs, PT(CR_IFS)+16+(off); \
- .spillsp ar.unat, PT(AR_UNAT)+16+(off); \
- .spillsp ar.fpsr, PT(AR_FPSR)+16+(off); \
- .spillsp pr, PT(PR)+16+(off);
- #define PT_REGS_UNWIND_INFO(off) \
- .prologue; \
- PT_REGS_SAVES(off); \
- .body
- #define SWITCH_STACK_SAVES(off) \
- .savesp ar.unat,SW(CALLER_UNAT)+16+(off); \
- .savesp ar.fpsr,SW(AR_FPSR)+16+(off); \
- .spillsp f2,SW(F2)+16+(off); .spillsp f3,SW(F3)+16+(off); \
- .spillsp f4,SW(F4)+16+(off); .spillsp f5,SW(F5)+16+(off); \
- .spillsp f16,SW(F16)+16+(off); .spillsp f17,SW(F17)+16+(off); \
- .spillsp f18,SW(F18)+16+(off); .spillsp f19,SW(F19)+16+(off); \
- .spillsp f20,SW(F20)+16+(off); .spillsp f21,SW(F21)+16+(off); \
- .spillsp f22,SW(F22)+16+(off); .spillsp f23,SW(F23)+16+(off); \
- .spillsp f24,SW(F24)+16+(off); .spillsp f25,SW(F25)+16+(off); \
- .spillsp f26,SW(F26)+16+(off); .spillsp f27,SW(F27)+16+(off); \
- .spillsp f28,SW(F28)+16+(off); .spillsp f29,SW(F29)+16+(off); \
- .spillsp f30,SW(F30)+16+(off); .spillsp f31,SW(F31)+16+(off); \
- .spillsp r4,SW(R4)+16+(off); .spillsp r5,SW(R5)+16+(off); \
- .spillsp r6,SW(R6)+16+(off); .spillsp r7,SW(R7)+16+(off); \
- .spillsp b0,SW(B0)+16+(off); .spillsp b1,SW(B1)+16+(off); \
- .spillsp b2,SW(B2)+16+(off); .spillsp b3,SW(B3)+16+(off); \
- .spillsp b4,SW(B4)+16+(off); .spillsp b5,SW(B5)+16+(off); \
- .spillsp ar.pfs,SW(AR_PFS)+16+(off); .spillsp ar.lc,SW(AR_LC)+16+(off); \
- .spillsp @priunat,SW(AR_UNAT)+16+(off); \
- .spillsp ar.rnat,SW(AR_RNAT)+16+(off); \
- .spillsp ar.bspstore,SW(AR_BSPSTORE)+16+(off); \
- .spillsp pr,SW(PR)+16+(off)
- #define DO_SAVE_SWITCH_STACK \
- movl r28=1f; \
- ;; \
- .fframe IA64_SWITCH_STACK_SIZE; \
- adds sp=-IA64_SWITCH_STACK_SIZE,sp; \
- mov.ret.sptk b7=r28,1f; \
- SWITCH_STACK_SAVES(0); \
- br.cond.sptk.many save_switch_stack; \
- 1:
- #define DO_LOAD_SWITCH_STACK \
- movl r28=1f; \
- ;; \
- invala; \
- mov.ret.sptk b7=r28,1f; \
- br.cond.sptk.many load_switch_stack; \
- 1: .restore sp; \
- adds sp=IA64_SWITCH_STACK_SIZE,sp
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