* --------------------------------------------------------------------------------- *
* | 0h | 04h | 08h | 0ch | 010h | 014h | 018h | 01ch | *
* --------------------------------------------------------------------------------- *
-* | fc_strg |fc_deallo| limit | base | fc_seh | EDI | ESI | EBX | *
+* | fc_mxcsr|fc_x87_cw| fc_strg |fc_deallo| limit | base | fc_seh | EDI | *
* --------------------------------------------------------------------------------- *
* --------------------------------------------------------------------------------- *
* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
* --------------------------------------------------------------------------------- *
* | 020h | 024h | 028h | 02ch | 030h | 034h | 038h | 03ch | *
* --------------------------------------------------------------------------------- *
-* | EBP | EIP | to | data | | EH NXT |SEH HNDLR| | *
+* | ESI | EBX | EBP | EIP | to | data | EH NXT |SEH HNDLR| *
* --------------------------------------------------------------------------------- *
-*************************************************************************************/
+**************************************************************************************/
.file "jump_i386_ms_pe_gas.asm"
.text
.globl _jump_fcontext
.def _jump_fcontext; .scl 2; .type 32; .endef
_jump_fcontext:
- pushl %ebp /* save EBP */
- pushl %ebx /* save EBX */
- pushl %esi /* save ESI */
- pushl %edi /* save EDI */
+ /* prepare stack */
+ leal -0x2c(%esp), %esp
+
+#if !defined(BOOST_USE_TSX)
+ /* save MMX control- and status-word */
+ stmxcsr (%esp)
+ /* save x87 control-word */
+ fnstcw 0x4(%esp)
+#endif
/* load NT_TIB */
movl %fs:(0x18), %edx
-
+ /* load fiber local storage */
+ movl 0x10(%edx), %eax
+ movl %eax, 0x8(%esp)
+ /* load current dealloction stack */
+ movl 0xe0c(%edx), %eax
+ movl %eax, 0xc(%esp)
+ /* load current stack limit */
+ movl 0x8(%edx), %eax
+ movl %eax, 0x10(%esp)
+ /* load current stack base */
+ movl 0x4(%edx), %eax
+ movl %eax, 0x14(%esp)
/* load current SEH exception list */
movl (%edx), %eax
- push %eax
+ movl %eax, 0x18(%esp)
- /* load current stack base */
- movl 0x04(%edx), %eax
- push %eax
-
- /* load current stack limit */
- movl 0x08(%edx), %eax
- push %eax
-
- /* load current dealloction stack */
- movl 0xe0c(%edx), %eax
- push %eax
-
- /* load fiber local storage */
- movl 0x10(%edx), %eax
- push %eax
+ movl %edi, 0x1c(%esp) /* save EDI */
+ movl %esi, 0x20(%esp) /* save ESI */
+ movl %ebx, 0x24(%esp) /* save EBX */
+ movl %ebp, 0x28(%esp) /* save EBP */
/* store ESP (pointing to context-data) in EAX */
movl %esp, %eax
- /* first arg of jump_fcontext() == fcontext to jump to */
- movl 0x28(%esp), %ecx
-
- /* restore ESP (pointing to context-data) from EDX */
+ /* firstarg of jump_fcontext() == fcontext to jump to */
+ movl 0x30(%esp), %ecx
+
+ /* restore ESP (pointing to context-data) from ECX */
movl %ecx, %esp
- /* load NT_TIB into ECX */
- movl %fs:(0x18), %edx
+#if !defined(BOOST_USE_TSX)
+ /* restore MMX control- and status-word */
+ ldmxcsr (%esp)
+ /* restore x87 control-word */
+ fldcw 0x4(%esp)
+#endif
+ /* restore NT_TIB into EDX */
+ movl %fs:(0x18), %edx
/* restore fiber local storage */
- popl %ecx
+ movl 0x8(%esp), %ecx
movl %ecx, 0x10(%edx)
-
/* restore current deallocation stack */
- popl %ecx
+ movl 0xc(%esp), %ecx
movl %ecx, 0xe0c(%edx)
-
/* restore current stack limit */
- popl %ecx
- movl %ecx, 0x08(%edx)
-
+ movl 0x10(%esp), %ecx
+ movl %ecx, 0x8(%edx)
/* restore current stack base */
- popl %ecx
- movl %ecx, 0x04(%edx)
-
+ movl 0x14(%esp), %ecx
+ movl %ecx, 0x4(%edx)
/* restore current SEH exception list */
- popl %ecx
+ movl 0x18(%esp), %ecx
movl %ecx, (%edx)
- popl %edi /* save EDI */
- popl %esi /* save ESI */
- popl %ebx /* save EBX */
- popl %ebp /* save EBP */
+ movl 0x2c(%esp), %ecx /* restore EIP */
+
+ movl 0x1c(%esp), %edi /* restore EDI */
+ movl 0x20(%esp), %esi /* restore ESI */
+ movl 0x24(%esp), %ebx /* restore EBX */
+ movl 0x28(%esp), %ebp /* restore EBP */
+
+ /* prepare stack */
+ leal 0x30(%esp), %esp
/* return transfer_t */
/* FCTX == EAX, DATA == EDX */
- movl 0x2c(%eax), %edx
+ movl 0x34(%eax), %edx
/* jump to context */
- ret
+ jmp *%ecx
.section .drectve
.ascii " -export:\"jump_fcontext\""