diff options
Diffstat (limited to 'sys/amd64/amd64/exception.S')
| -rw-r--r-- | sys/amd64/amd64/exception.S | 35 |
1 files changed, 1 insertions, 34 deletions
diff --git a/sys/amd64/amd64/exception.S b/sys/amd64/amd64/exception.S index 0469a9a4b048..282b427d7cf5 100644 --- a/sys/amd64/amd64/exception.S +++ b/sys/amd64/amd64/exception.S @@ -218,40 +218,6 @@ IDTVEC(page) jmp alltraps_pushregs_no_rdi /* - * Call gate entry for FreeBSD ELF and Linux/NetBSD syscall (int 0x80) - * - * This is a SDT_SYSIDT entry point (unlike the i386 port) so that we - * can do a swapgs before enabling interrupts. This is critical because - * if we took an interrupt before swapgs, the interrupt code would see - * that it originated in supervisor mode and skip the swapgs. - */ - SUPERALIGN_TEXT -IDTVEC(int0x80_syscall) - swapgs - sti - pushq $2 /* sizeof "int 0x80" */ - subq $TF_ERR,%rsp /* skip over tf_trapno */ - movq %rdi,TF_RDI(%rsp) - movq %rsi,TF_RSI(%rsp) - movq %rdx,TF_RDX(%rsp) - movq %rcx,TF_RCX(%rsp) - movq %r8,TF_R8(%rsp) - movq %r9,TF_R9(%rsp) - movq %rax,TF_RAX(%rsp) - movq %rbx,TF_RBX(%rsp) - movq %rbp,TF_RBP(%rsp) - movq %r10,TF_R10(%rsp) - movq %r11,TF_R11(%rsp) - movq %r12,TF_R12(%rsp) - movq %r13,TF_R13(%rsp) - movq %r14,TF_R14(%rsp) - movq %r15,TF_R15(%rsp) - FAKE_MCOUNT(13*4(%rsp)) - call syscall - MEXITCOUNT - jmp doreti - -/* * Fast syscall entry point. We enter here with just our new %cs/%ss set, * and the new privilige level. We are still running on the old user stack * pointer. We have to juggle a few things around to find our stack etc. @@ -353,6 +319,7 @@ ENTRY(fork_trampoline) */ .text SUPERALIGN_TEXT + .globl doreti .type doreti,@function doreti: FAKE_MCOUNT(bintr) /* init "from" bintr -> doreti */ |