| context.S (132928) | context.S (155990) |
|---|---|
| 1/* 2 * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <machine/asm.h> | 1/* 2 * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <machine/asm.h> |
| 28__FBSDID("$FreeBSD: head/lib/libkse/arch/amd64/amd64/context.S 132928 2004-07-31 14:18:26Z davidxu $"); | 28__FBSDID("$FreeBSD: head/lib/libkse/arch/amd64/amd64/context.S 155990 2006-02-24 22:03:10Z deischen $"); |
| 29 30/* 31 * The following notes ("cheat sheet") was provided by Peter Wemm. 32 * 33 * scratch: 34 * rax (1st return) 35 * rcx (4th arg) 36 * rdx (3rd arg, 2nd return) --- 120 unchanged lines hidden (view full) --- 157 158/* 159 * _amd64_ctx_restore(mcontext_t *mcp, intptr_t val, intptr_t *loc); 160 */ 161ENTRY(_amd64_restore_context) 162 cmpq $0, %rdi /* check for null pointer */ 163 jne 1f 164 movq $-1, %rax | 29 30/* 31 * The following notes ("cheat sheet") was provided by Peter Wemm. 32 * 33 * scratch: 34 * rax (1st return) 35 * rcx (4th arg) 36 * rdx (3rd arg, 2nd return) --- 120 unchanged lines hidden (view full) --- 157 158/* 159 * _amd64_ctx_restore(mcontext_t *mcp, intptr_t val, intptr_t *loc); 160 */ 161ENTRY(_amd64_restore_context) 162 cmpq $0, %rdi /* check for null pointer */ 163 jne 1f 164 movq $-1, %rax |
| 165 jmp 7f | 165 jmp 2f |
| 1661: cmpq $MC_SIZE, MC_LEN_OFFSET(%rdi) /* is context valid? */ 167 je 2f 168 movq $-1, %rax /* bzzzt, invalid context */ | 1661: cmpq $MC_SIZE, MC_LEN_OFFSET(%rdi) /* is context valid? */ 167 je 2f 168 movq $-1, %rax /* bzzzt, invalid context */ |
| 169 jmp 7f | 169 ret |
| 1702: movq MC_RCX(%rdi), %rcx 171 movq MC_R8(%rdi), %r8 172 movq MC_R9(%rdi), %r9 173 movq MC_RBX(%rdi), %rbx 174 movq MC_RBP(%rdi), %rbp 175 movq MC_R10(%rdi), %r10 176 movq MC_R11(%rdi), %r11 177 movq MC_R12(%rdi), %r12 --- 30 unchanged lines hidden (view full) --- 208 /* At this point we're done with the context. */ 209 cmpq $0, %rdx /* set *loc to val */ 210 je 6f 211 movq %rsi, (%rdx) 2126: popfq /* restore flags */ 213 popq %rsi /* restore rsi, rdx, and rdi */ 214 popq %rdx 215 popq %rdi | 1702: movq MC_RCX(%rdi), %rcx 171 movq MC_R8(%rdi), %r8 172 movq MC_R9(%rdi), %r9 173 movq MC_RBX(%rdi), %rbx 174 movq MC_RBP(%rdi), %rbp 175 movq MC_R10(%rdi), %r10 176 movq MC_R11(%rdi), %r11 177 movq MC_R12(%rdi), %r12 --- 30 unchanged lines hidden (view full) --- 208 /* At this point we're done with the context. */ 209 cmpq $0, %rdx /* set *loc to val */ 210 je 6f 211 movq %rsi, (%rdx) 2126: popfq /* restore flags */ 213 popq %rsi /* restore rsi, rdx, and rdi */ 214 popq %rdx 215 popq %rdi |
| 216 leaq (8 + REDZONE)(%rsp), %rsp 217 jmp *-(8 + REDZONE)(%rsp) /* jump to return address */ 2187: ret | 216 ret $REDZONE 217 |