update sources to v12.2.3

[ceph.git] / ceph / src / boost / libs / context / src / asm / ontop_x86_64_sysv_elf_gas.S

diff --git a/ceph/src/boost/libs/context/src/asm/ontop_x86_64_sysv_elf_gas.S b/ceph/src/boost/libs/context/src/asm/ontop_x86_64_sysv_elf_gas.S
index cf189e929d1666fc8d8377b9dcdc43f63e4b5ec6..c4402cc8fcadf5ba1acf3ec12ce7895c5f4db335 100644 (file)
--- a/ceph/src/boost/libs/context/src/asm/ontop_x86_64_sysv_elf_gas.S
+++ b/ceph/src/boost/libs/context/src/asm/ontop_x86_64_sysv_elf_gas.S
@@ -12,14 +12,14 @@
  *  ----------------------------------------------------------------------------------  *
  *  |   0x0   |   0x4   |   0x8   |   0xc   |   0x10   |   0x14  |   0x18  |   0x1c  |  *
  *  ----------------------------------------------------------------------------------  *
- *  |        R12        |         R13       |         R14        |        R15        |  *
+ *  | fc_mxcsr|fc_x87_cw|        R12        |         R13        |        R14        |  *
  *  ----------------------------------------------------------------------------------  *
  *  ----------------------------------------------------------------------------------  *
  *  |    8    |    9    |   10    |   11    |    12    |    13   |    14   |    15   |  *
  *  ----------------------------------------------------------------------------------  *
  *  |   0x20  |   0x24  |   0x28  |  0x2c   |   0x30   |   0x34  |   0x38  |   0x3c  |  *
  *  ----------------------------------------------------------------------------------  *
- *  |        RBX        |         RBP       |         RIP        |       EXIT        |  *
+ *  |        R15        |        RBX        |         RBP        |        RIP        |  *
  *  ----------------------------------------------------------------------------------  *
  *                                                                                      *
  ****************************************************************************************/
@@ -29,12 +29,22 @@
 .type ontop_fcontext,@function
 .align 16
 ontop_fcontext:
-    pushq  %rbp  /* save RBP */
-    pushq  %rbx  /* save RBX */
-    pushq  %r15  /* save R15 */
-    pushq  %r14  /* save R14 */
-    pushq  %r13  /* save R13 */
-    pushq  %r12  /* save R12 */
+    /* preserve ontop-function in R8 */
+    movq  %rdx, %r8
+
+    leaq  -0x38(%rsp), %rsp /* prepare stack */
+
+#if !defined(BOOST_USE_TSX)
+    stmxcsr  (%rsp)     /* save MMX control- and status-word */
+    fnstcw   0x4(%rsp)  /* save x87 control-word */
+#endif
+
+    movq  %r12, 0x8(%rsp)  /* save R12 */
+    movq  %r13, 0x10(%rsp)  /* save R13 */
+    movq  %r14, 0x18(%rsp)  /* save R14 */
+    movq  %r15, 0x20(%rsp)  /* save R15 */
+    movq  %rbx, 0x28(%rsp)  /* save RBX */
+    movq  %rbp, 0x30(%rsp)  /* save RBP */
 
     /* store RSP (pointing to context-data) in RAX */
     movq  %rsp, %rax
@@ -42,15 +52,19 @@ ontop_fcontext:
     /* restore RSP (pointing to context-data) from RDI */
     movq  %rdi, %rsp
 
-    popq  %r12  /* restrore R12 */
-    popq  %r13  /* restrore R13 */
-    popq  %r14  /* restrore R14 */
-    popq  %r15  /* restrore R15 */
-    popq  %rbx  /* restrore RBX */
-    popq  %rbp  /* restrore RBP */
+#if !defined(BOOST_USE_TSX)
+    ldmxcsr  (%rsp)     /* restore MMX control- and status-word */
+    fldcw    0x4(%rsp)  /* restore x87 control-word */
+#endif
 
-    /* preserve ontop-function in R8 */
-    movq  %rdx, %r8
+    movq  0x8(%rsp), %r12  /* restore R12 */
+    movq  0x10(%rsp), %r13  /* restore R13 */
+    movq  0x18(%rsp), %r14  /* restore R14 */
+    movq  0x20(%rsp), %r15  /* restore R15 */
+    movq  0x28(%rsp), %rbx  /* restore RBX */
+    movq  0x30(%rsp), %rbp  /* restore RBP */
+
+    leaq  0x38(%rsp), %rsp /* prepare stack */
 
     /* return transfer_t from jump */
     /* RAX == fctx, RDX == data */