1 /* $OpenBSD: frameasm.h,v 1.9 2015/07/17 15:37:58 guenther Exp $ */ 2 /* $NetBSD: frameasm.h,v 1.1 2003/04/26 18:39:40 fvdl Exp $ */ 3 4 #ifndef _AMD64_MACHINE_FRAMEASM_H 5 #define _AMD64_MACHINE_FRAMEASM_H 6 7 /* 8 * Macros to define pushing/popping frames for interrupts, traps 9 * and system calls. Currently all the same; will diverge later. 10 */ 11 12 /* 13 * These are used on interrupt or trap entry or exit. 14 */ 15 #define INTR_SAVE_GPRS \ 16 subq $120,%rsp ; \ 17 movq %r15,TF_R15(%rsp) ; \ 18 movq %r14,TF_R14(%rsp) ; \ 19 movq %r13,TF_R13(%rsp) ; \ 20 movq %r12,TF_R12(%rsp) ; \ 21 movq %r11,TF_R11(%rsp) ; \ 22 movq %r10,TF_R10(%rsp) ; \ 23 movq %r9,TF_R9(%rsp) ; \ 24 movq %r8,TF_R8(%rsp) ; \ 25 movq %rdi,TF_RDI(%rsp) ; \ 26 movq %rsi,TF_RSI(%rsp) ; \ 27 movq %rbp,TF_RBP(%rsp) ; \ 28 movq %rbx,TF_RBX(%rsp) ; \ 29 movq %rdx,TF_RDX(%rsp) ; \ 30 movq %rcx,TF_RCX(%rsp) ; \ 31 movq %rax,TF_RAX(%rsp) 32 33 #define INTRENTRY \ 34 subq $32,%rsp ; \ 35 testq $SEL_RPL,56(%rsp) ; \ 36 je 98f ; \ 37 swapgs ; \ 38 98: INTR_SAVE_GPRS 39 40 #define INTRFASTEXIT \ 41 jmp intr_fast_exit 42 43 #define INTR_RECURSE_HWFRAME \ 44 movq %rsp,%r10 ; \ 45 movl %ss,%r11d ; \ 46 pushq %r11 ; \ 47 pushq %r10 ; \ 48 pushfq ; \ 49 movl %cs,%r11d ; \ 50 pushq %r11 ; \ 51 pushq %r13 ; 52 53 /* 54 * Restore FS.base if it's not already in the CPU, and do the cli/swapgs. 55 * Uses %rax, %rcx, and %rdx 56 */ 57 #define INTR_RESTORE_SELECTORS \ 58 btsl $CPUF_USERSEGS_BIT, CPUVAR(FLAGS) ; \ 59 jc 99f ; \ 60 movq CPUVAR(CURPCB),%rdx /* for below */ ; \ 61 movq PCB_FSBASE(%rdx),%rax ; \ 62 cmpq $0,%rax ; \ 63 je 99f /* setting %fs has zeroed FS.base */ ; \ 64 movq %rax,%rdx ; \ 65 shrq $32,%rdx ; \ 66 movl $MSR_FSBASE,%ecx ; \ 67 wrmsr ; \ 68 99: movw $(GSEL(GUDATA_SEL, SEL_UPL)),%ax ; \ 69 cli ; \ 70 swapgs ; \ 71 movw %ax,%gs 72 73 74 #define CHECK_ASTPENDING(reg) movq CPUVAR(CURPROC),reg ; \ 75 cmpq $0, reg ; \ 76 je 99f ; \ 77 cmpl $0, P_MD_ASTPENDING(reg) ; \ 78 99: 79 80 #define CLEAR_ASTPENDING(reg) movl $0, P_MD_ASTPENDING(reg) 81 82 #endif /* _AMD64_MACHINE_FRAMEASM_H */ 83