projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /* |
| 2 | Copyright Oliver Kowalke 2009. | |
| 3 | Distributed under the Boost Software License, Version 1.0. | |
| 4 | (See accompanying file LICENSE_1_0.txt or copy at | |
| 5 | http://www.boost.org/LICENSE_1_0.txt) | |
| 6 | */ | |
| 7 | ||
| 8 | /**************************************************************************************** | |
| 9 | * * | |
| 10 | * ---------------------------------------------------------------------------------- * | |
| 11 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | * | |
| 12 | * ---------------------------------------------------------------------------------- * | |
| 13 | * | 0x0 | 0x4 | 0x8 | 0xc | 0x10 | 0x14 | 0x18 | 0x1c | * | |
| 14 | * ---------------------------------------------------------------------------------- * | |
| b32b8144 | 15 | * | fc_mxcsr|fc_x87_cw| R12 | R13 | R14 | * |
| 7c673cae FG |
16 | * ---------------------------------------------------------------------------------- * |
| 17 | * ---------------------------------------------------------------------------------- * | |
| 18 | * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * | |
| 19 | * ---------------------------------------------------------------------------------- * | |
| 20 | * | 0x20 | 0x24 | 0x28 | 0x2c | 0x30 | 0x34 | 0x38 | 0x3c | * | |
| 21 | * ---------------------------------------------------------------------------------- * | |
| b32b8144 | 22 | * | R15 | RBX | RBP | RIP | * |
| 7c673cae FG |
23 | * ---------------------------------------------------------------------------------- * |
| 24 | * * | |
| 25 | ****************************************************************************************/ | |
| 26 | ||
| 27 | .text | |
| 28 | .globl _jump_fcontext | |
| 29 | .align 8 | |
| 30 | _jump_fcontext: | |
| b32b8144 FG |
31 | leaq -0x38(%rsp), %rsp /* prepare stack */ |
| 32 | ||
| 33 | #if !defined(BOOST_USE_TSX) | |
| 34 | stmxcsr (%rsp) /* save MMX control- and status-word */ | |
| 35 | fnstcw 0x4(%rsp) /* save x87 control-word */ | |
| 36 | #endif | |
| 37 | ||
| 38 | movq %r12, 0x8(%rsp) /* save R12 */ | |
| 39 | movq %r13, 0x10(%rsp) /* save R13 */ | |
| 40 | movq %r14, 0x18(%rsp) /* save R14 */ | |
| 41 | movq %r15, 0x20(%rsp) /* save R15 */ | |
| 42 | movq %rbx, 0x28(%rsp) /* save RBX */ | |
| 43 | movq %rbp, 0x30(%rsp) /* save RBP */ | |
| 7c673cae FG |
44 | |
| 45 | /* store RSP (pointing to context-data) in RAX */ | |
| 46 | movq %rsp, %rax | |
| 47 | ||
| 48 | /* restore RSP (pointing to context-data) from RDI */ | |
| 49 | movq %rdi, %rsp | |
| 50 | ||
| b32b8144 FG |
51 | movq 0x38(%rsp), %r8 /* restore return-address */ |
| 52 | ||
| 53 | #if !defined(BOOST_USE_TSX) | |
| 54 | ldmxcsr (%rsp) /* restore MMX control- and status-word */ | |
| 55 | fldcw 0x4(%rsp) /* restore x87 control-word */ | |
| 56 | #endif | |
| 57 | ||
| 58 | movq 0x8(%rsp), %r12 /* restore R12 */ | |
| 59 | movq 0x10(%rsp), %r13 /* restore R13 */ | |
| 60 | movq 0x18(%rsp), %r14 /* restore R14 */ | |
| 61 | movq 0x20(%rsp), %r15 /* restore R15 */ | |
| 62 | movq 0x28(%rsp), %rbx /* restore RBX */ | |
| 63 | movq 0x30(%rsp), %rbp /* restore RBP */ | |
| 7c673cae | 64 | |
| b32b8144 | 65 | leaq 0x40(%rsp), %rsp /* prepare stack */ |
| 7c673cae FG |
66 | |
| 67 | /* return transfer_t from jump */ | |
| 68 | /* RAX == fctx, RDX == data */ | |
| 69 | movq %rsi, %rdx | |
| 70 | /* pass transfer_t as first arg in context function */ | |
| 71 | /* RDI == fctx, RSI == data */ | |
| 72 | movq %rax, %rdi | |
| 73 | ||
| 74 | /* indirect jump to context */ | |
| 75 | jmp *%r8 |