CbC/CbC_gcc: libgcc/config/i386/morestack.S annotate

annotate libgcc/config/i386/morestack.S @ 111:04ced10e8804

gcc 7

author	kono
date	Fri, 27 Oct 2017 22:46:09 +0900
parents	561a7518be6b
children	84e7813d76e9

rev	line source
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1 # x86/x86_64 support for -fsplit-stack.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	2 # Copyright (C) 2009-2017 Free Software Foundation, Inc.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	3 # Contributed by Ian Lance Taylor <iant@google.com>.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	4
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	5 # This file is part of GCC.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	6
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	7 # GCC is free software; you can redistribute it and/or modify it under
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	8 # the terms of the GNU General Public License as published by the Free
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	9 # Software Foundation; either version 3, or (at your option) any later
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	10 # version.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	11
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	12 # GCC is distributed in the hope that it will be useful, but WITHOUT ANY
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	14 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	15 # for more details.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	16
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	17 # Under Section 7 of GPL version 3, you are granted additional
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	18 # permissions described in the GCC Runtime Library Exception, version
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	19 # 3.1, as published by the Free Software Foundation.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	20
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	21 # You should have received a copy of the GNU General Public License and
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	22 # a copy of the GCC Runtime Library Exception along with this program;
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	23 # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	24 # <http://www.gnu.org/licenses/>.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	25
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	26
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	27 # Support for allocating more stack space when using -fsplit-stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	28 # When a function discovers that it needs more stack space, it will
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	29 # call __morestack with the size of the stack frame and the size of
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	30 # the parameters to copy from the old stack frame to the new one.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	31 # The __morestack function preserves the parameter registers and
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	32 # calls __generic_morestack to actually allocate the stack space.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	33
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	34 # When this is called stack space is very low, but we ensure that
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	35 # there is enough space to push the parameter registers and to call
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	36 # __generic_morestack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	37
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	38 # When calling __generic_morestack, FRAME_SIZE points to the size of
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	39 # the desired frame when the function is called, and the function
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	40 # sets it to the size of the allocated stack. OLD_STACK points to
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	41 # the parameters on the old stack and PARAM_SIZE is the number of
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	42 # bytes of parameters to copy to the new stack. These are the
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	43 # parameters of the function that called __morestack. The
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	44 # __generic_morestack function returns the new stack pointer,
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	45 # pointing to the address of the first copied parameter. The return
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	46 # value minus the returned *FRAME_SIZE will be the first address on
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	47 # the stack which we should not use.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	48
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	49 # void __generic_morestack (size_t frame_size, void *old_stack,
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	50 # size_t param_size);
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	51
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	52 # The __morestack routine has to arrange for the caller to return to a
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	53 # stub on the new stack. The stub is responsible for restoring the
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	54 # old stack pointer and returning to the caller's caller. This calls
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	55 # __generic_releasestack to retrieve the old stack pointer and release
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	56 # the newly allocated stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	57
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	58 # void __generic_releasestack (size_t available);
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	59
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	60 # We do a little dance so that the processor's call/return return
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	61 # address prediction works out. The compiler arranges for the caller
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	62 # to look like this:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	63 # call __generic_morestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	64 # ret
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	65 # L:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	66 # // carry on with function
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	67 # After we allocate more stack, we call L, which is in our caller.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	68 # When that returns (to the predicted instruction), we release the
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	69 # stack segment and reset the stack pointer. We then return to the
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	70 # predicted instruction, namely the ret instruction immediately after
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	71 # the call to __generic_morestack. That then returns to the caller of
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	72 # the original caller.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	73
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	74
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	75 # The amount of extra space we ask for. In general this has to be
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	76 # enough for the dynamic loader to find a symbol and for a signal
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	77 # handler to run.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	78
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	79 #ifndef __x86_64__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	80 #define BACKOFF (1024)
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	81 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	82 #define BACKOFF (1536)
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	83 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	84
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	85
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	86 # The amount of space we ask for when calling non-split-stack code.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	87 #define NON_SPLIT_STACK 0x100000
04ced10e8804 gcc 7 kono parents: 68 diff changeset	88
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	89 # This entry point is for split-stack code which calls non-split-stack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	90 # code. When the linker sees this case, it converts the call to
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	91 # __morestack to call __morestack_non_split instead. We just bump the
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	92 # requested stack space by 16K.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	93
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	94 .global __morestack_non_split
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	95 .hidden __morestack_non_split
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	96
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	97 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	98 .type __morestack_non_split,@function
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	99 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	100
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	101 __morestack_non_split:
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	102 .cfi_startproc
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	103
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	104 #ifndef __x86_64__
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	105
04ced10e8804 gcc 7 kono parents: 68 diff changeset	106 # See below for an extended explanation of this.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	107 .cfi_def_cfa %esp,16
04ced10e8804 gcc 7 kono parents: 68 diff changeset	108
04ced10e8804 gcc 7 kono parents: 68 diff changeset	109 pushl %eax # Save %eax in case it is a parameter.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	110
04ced10e8804 gcc 7 kono parents: 68 diff changeset	111 .cfi_adjust_cfa_offset 4 # Account for pushed register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	112
04ced10e8804 gcc 7 kono parents: 68 diff changeset	113 movl %esp,%eax # Current stack,
04ced10e8804 gcc 7 kono parents: 68 diff changeset	114 subl 8(%esp),%eax # less required stack frame size,
04ced10e8804 gcc 7 kono parents: 68 diff changeset	115 subl $NON_SPLIT_STACK,%eax # less space for non-split code.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	116 cmpl %gs:0x30,%eax # See if we have enough space.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	117 jb 2f # Get more space if we need it.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	118
04ced10e8804 gcc 7 kono parents: 68 diff changeset	119 # Here the stack is
04ced10e8804 gcc 7 kono parents: 68 diff changeset	120 # %esp + 20: stack pointer after two returns
04ced10e8804 gcc 7 kono parents: 68 diff changeset	121 # %esp + 16: return address of morestack caller's caller
04ced10e8804 gcc 7 kono parents: 68 diff changeset	122 # %esp + 12: size of parameters
04ced10e8804 gcc 7 kono parents: 68 diff changeset	123 # %esp + 8: new stack frame size
04ced10e8804 gcc 7 kono parents: 68 diff changeset	124 # %esp + 4: return address of this function
04ced10e8804 gcc 7 kono parents: 68 diff changeset	125 # %esp: saved %eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	126 #
04ced10e8804 gcc 7 kono parents: 68 diff changeset	127 # Since we aren't doing a full split stack, we don't need to
04ced10e8804 gcc 7 kono parents: 68 diff changeset	128 # do anything when our caller returns. So we return to our
04ced10e8804 gcc 7 kono parents: 68 diff changeset	129 # caller rather than calling it, and let it return as usual.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	130 # To make that work we adjust the return address.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	131
04ced10e8804 gcc 7 kono parents: 68 diff changeset	132 # This breaks call/return address prediction for the call to
04ced10e8804 gcc 7 kono parents: 68 diff changeset	133 # this function. I can't figure out a way to make it work
04ced10e8804 gcc 7 kono parents: 68 diff changeset	134 # short of copying the parameters down the stack, which will
04ced10e8804 gcc 7 kono parents: 68 diff changeset	135 # probably take more clock cycles than we will lose breaking
04ced10e8804 gcc 7 kono parents: 68 diff changeset	136 # call/return address prediction. We will only break
04ced10e8804 gcc 7 kono parents: 68 diff changeset	137 # prediction for this call, not for our caller.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	138
04ced10e8804 gcc 7 kono parents: 68 diff changeset	139 movl 4(%esp),%eax # Increment the return address
04ced10e8804 gcc 7 kono parents: 68 diff changeset	140 cmpb $0xc3,(%eax) # to skip the ret instruction;
04ced10e8804 gcc 7 kono parents: 68 diff changeset	141 je 1f # see above.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	142 addl $2,%eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	143 1: inc %eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	144
04ced10e8804 gcc 7 kono parents: 68 diff changeset	145 # If the instruction that we return to is
04ced10e8804 gcc 7 kono parents: 68 diff changeset	146 # leal 20(%ebp),{%eax,%ecx,%edx}
04ced10e8804 gcc 7 kono parents: 68 diff changeset	147 # then we have been called by a varargs function that expects
04ced10e8804 gcc 7 kono parents: 68 diff changeset	148 # %ebp to hold a real value. That can only work if we do the
04ced10e8804 gcc 7 kono parents: 68 diff changeset	149 # full stack split routine. FIXME: This is fragile.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	150 cmpb $0x8d,(%eax)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	151 jne 3f
04ced10e8804 gcc 7 kono parents: 68 diff changeset	152 cmpb $0x14,2(%eax)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	153 jne 3f
04ced10e8804 gcc 7 kono parents: 68 diff changeset	154 cmpb $0x45,1(%eax)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	155 je 2f
04ced10e8804 gcc 7 kono parents: 68 diff changeset	156 cmpb $0x4d,1(%eax)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	157 je 2f
04ced10e8804 gcc 7 kono parents: 68 diff changeset	158 cmpb $0x55,1(%eax)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	159 je 2f
04ced10e8804 gcc 7 kono parents: 68 diff changeset	160
04ced10e8804 gcc 7 kono parents: 68 diff changeset	161 3:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	162 movl %eax,4(%esp) # Update return address.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	163
04ced10e8804 gcc 7 kono parents: 68 diff changeset	164 popl %eax # Restore %eax and stack.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	165
04ced10e8804 gcc 7 kono parents: 68 diff changeset	166 .cfi_adjust_cfa_offset -4 # Account for popped register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	167
04ced10e8804 gcc 7 kono parents: 68 diff changeset	168 ret $8 # Return to caller, popping args.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	169
04ced10e8804 gcc 7 kono parents: 68 diff changeset	170 2:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	171 .cfi_adjust_cfa_offset 4 # Back to where we were.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	172
04ced10e8804 gcc 7 kono parents: 68 diff changeset	173 popl %eax # Restore %eax and stack.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	174
04ced10e8804 gcc 7 kono parents: 68 diff changeset	175 .cfi_adjust_cfa_offset -4 # Account for popped register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	176
04ced10e8804 gcc 7 kono parents: 68 diff changeset	177 # Increment space we request.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	178 addl $NON_SPLIT_STACK+0x1000+BACKOFF,4(%esp)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	179
04ced10e8804 gcc 7 kono parents: 68 diff changeset	180 # Fall through into morestack.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	181
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	182 #else
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	183
04ced10e8804 gcc 7 kono parents: 68 diff changeset	184 # See below for an extended explanation of this.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	185 .cfi_def_cfa %rsp,16
04ced10e8804 gcc 7 kono parents: 68 diff changeset	186
04ced10e8804 gcc 7 kono parents: 68 diff changeset	187 pushq %rax # Save %rax in case caller is using
04ced10e8804 gcc 7 kono parents: 68 diff changeset	188 # it to preserve original %r10.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	189 .cfi_adjust_cfa_offset 8 # Adjust for pushed register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	190
04ced10e8804 gcc 7 kono parents: 68 diff changeset	191 movq %rsp,%rax # Current stack,
04ced10e8804 gcc 7 kono parents: 68 diff changeset	192 subq %r10,%rax # less required stack frame size,
04ced10e8804 gcc 7 kono parents: 68 diff changeset	193 subq $NON_SPLIT_STACK,%rax # less space for non-split code.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	194
04ced10e8804 gcc 7 kono parents: 68 diff changeset	195 #ifdef __LP64__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	196 cmpq %fs:0x70,%rax # See if we have enough space.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	197 #else
04ced10e8804 gcc 7 kono parents: 68 diff changeset	198 cmpl %fs:0x40,%eax
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	199 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	200
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	201 jb 2f # Get more space if we need it.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	202
04ced10e8804 gcc 7 kono parents: 68 diff changeset	203 # If the instruction that we return to is
04ced10e8804 gcc 7 kono parents: 68 diff changeset	204 # leaq 24(%rbp), %r11n
04ced10e8804 gcc 7 kono parents: 68 diff changeset	205 # then we have been called by a varargs function that expects
04ced10e8804 gcc 7 kono parents: 68 diff changeset	206 # %ebp to hold a real value. That can only work if we do the
04ced10e8804 gcc 7 kono parents: 68 diff changeset	207 # full stack split routine. FIXME: This is fragile.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	208 movq 8(%rsp),%rax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	209 incq %rax # Skip ret instruction in caller.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	210 cmpl $0x185d8d4c,(%rax)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	211 je 2f
04ced10e8804 gcc 7 kono parents: 68 diff changeset	212
04ced10e8804 gcc 7 kono parents: 68 diff changeset	213 # This breaks call/return prediction, as described above.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	214 incq 8(%rsp) # Increment the return address.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	215
04ced10e8804 gcc 7 kono parents: 68 diff changeset	216 popq %rax # Restore register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	217
04ced10e8804 gcc 7 kono parents: 68 diff changeset	218 .cfi_adjust_cfa_offset -8 # Adjust for popped register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	219
04ced10e8804 gcc 7 kono parents: 68 diff changeset	220 ret # Return to caller.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	221
04ced10e8804 gcc 7 kono parents: 68 diff changeset	222 2:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	223 popq %rax # Restore register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	224
04ced10e8804 gcc 7 kono parents: 68 diff changeset	225 .cfi_adjust_cfa_offset -8 # Adjust for popped register.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	226
04ced10e8804 gcc 7 kono parents: 68 diff changeset	227 # Increment space we request.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	228 addq $NON_SPLIT_STACK+0x1000+BACKOFF,%r10
04ced10e8804 gcc 7 kono parents: 68 diff changeset	229
04ced10e8804 gcc 7 kono parents: 68 diff changeset	230 # Fall through into morestack.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	231
04ced10e8804 gcc 7 kono parents: 68 diff changeset	232 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	233
04ced10e8804 gcc 7 kono parents: 68 diff changeset	234 .cfi_endproc
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	235 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	236 .size __morestack_non_split, . - __morestack_non_split
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	237 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	238
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	239 # __morestack_non_split falls through into __morestack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	240
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	241
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	242 # The __morestack function.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	243
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	244 .global __morestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	245 .hidden __morestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	246
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	247 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	248 .type __morestack,@function
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	249 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	250
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	251 __morestack:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	252 .LFB1:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	253 .cfi_startproc
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	254
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	255
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	256 #ifndef __x86_64__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	257
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	258
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	259 # The 32-bit __morestack function.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	260
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	261 # We use a cleanup to restore the stack guard if an exception
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	262 # is thrown through this code.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	263 #ifndef __PIC__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	264 .cfi_personality 0,__gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	265 .cfi_lsda 0,.LLSDA1
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	266 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	267 .cfi_personality 0x9b,DW.ref.__gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	268 .cfi_lsda 0x1b,.LLSDA1
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	269 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	270
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	271 # We return below with a ret $8. We will return to a single
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	272 # return instruction, which will return to the caller of our
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	273 # caller. We let the unwinder skip that single return
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	274 # instruction, and just return to the real caller.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	275
04ced10e8804 gcc 7 kono parents: 68 diff changeset	276 # Here CFA points just past the return address on the stack,
04ced10e8804 gcc 7 kono parents: 68 diff changeset	277 # e.g., on function entry it is %esp + 4. The stack looks
04ced10e8804 gcc 7 kono parents: 68 diff changeset	278 # like this:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	279 # CFA + 12: stack pointer after two returns
04ced10e8804 gcc 7 kono parents: 68 diff changeset	280 # CFA + 8: return address of morestack caller's caller
04ced10e8804 gcc 7 kono parents: 68 diff changeset	281 # CFA + 4: size of parameters
04ced10e8804 gcc 7 kono parents: 68 diff changeset	282 # CFA: new stack frame size
04ced10e8804 gcc 7 kono parents: 68 diff changeset	283 # CFA - 4: return address of this function
04ced10e8804 gcc 7 kono parents: 68 diff changeset	284 # CFA - 8: previous value of %ebp; %ebp points here
04ced10e8804 gcc 7 kono parents: 68 diff changeset	285 # Setting the new CFA to be the current CFA + 12 (i.e., %esp +
04ced10e8804 gcc 7 kono parents: 68 diff changeset	286 # 16) will make the unwinder pick up the right return address.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	287
04ced10e8804 gcc 7 kono parents: 68 diff changeset	288 .cfi_def_cfa %esp,16
04ced10e8804 gcc 7 kono parents: 68 diff changeset	289
04ced10e8804 gcc 7 kono parents: 68 diff changeset	290 pushl %ebp
04ced10e8804 gcc 7 kono parents: 68 diff changeset	291 .cfi_adjust_cfa_offset 4
04ced10e8804 gcc 7 kono parents: 68 diff changeset	292 .cfi_offset %ebp, -20
04ced10e8804 gcc 7 kono parents: 68 diff changeset	293 movl %esp,%ebp
04ced10e8804 gcc 7 kono parents: 68 diff changeset	294 .cfi_def_cfa_register %ebp
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	295
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	296 # In 32-bit mode the parameters are pushed on the stack. The
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	297 # argument size is pushed then the new stack frame size is
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	298 # pushed.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	299
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	300 # In the body of a non-leaf function, the stack pointer will
04ced10e8804 gcc 7 kono parents: 68 diff changeset	301 # be aligned to a 16-byte boundary. That is CFA + 12 in the
04ced10e8804 gcc 7 kono parents: 68 diff changeset	302 # stack picture above: (CFA + 12) % 16 == 0. At this point we
04ced10e8804 gcc 7 kono parents: 68 diff changeset	303 # have %esp == CFA - 8, so %esp % 16 == 12. We need some
04ced10e8804 gcc 7 kono parents: 68 diff changeset	304 # space for saving registers and passing parameters, and we
04ced10e8804 gcc 7 kono parents: 68 diff changeset	305 # need to wind up with %esp % 16 == 0.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	306 subl $44,%esp
04ced10e8804 gcc 7 kono parents: 68 diff changeset	307
04ced10e8804 gcc 7 kono parents: 68 diff changeset	308 # Because our cleanup code may need to clobber %ebx, we need
04ced10e8804 gcc 7 kono parents: 68 diff changeset	309 # to save it here so the unwinder can restore the value used
04ced10e8804 gcc 7 kono parents: 68 diff changeset	310 # by the caller. Note that we don't have to restore the
04ced10e8804 gcc 7 kono parents: 68 diff changeset	311 # register, since we don't change it, we just have to save it
04ced10e8804 gcc 7 kono parents: 68 diff changeset	312 # for the unwinder.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	313 movl %ebx,-4(%ebp)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	314 .cfi_offset %ebx, -24
04ced10e8804 gcc 7 kono parents: 68 diff changeset	315
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	316 # In 32-bit mode the registers %eax, %edx, and %ecx may be
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	317 # used for parameters, depending on the regparm and fastcall
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	318 # attributes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	319
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	320 movl %eax,-8(%ebp)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	321 movl %edx,-12(%ebp)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	322 movl %ecx,-16(%ebp)
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	323
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	324 call __morestack_block_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	325
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	326 movl 12(%ebp),%eax # The size of the parameters.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	327 movl %eax,8(%esp)
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	328 leal 20(%ebp),%eax # Address of caller's parameters.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	329 movl %eax,4(%esp)
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	330 addl $BACKOFF,8(%ebp) # Ask for backoff bytes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	331 leal 8(%ebp),%eax # The address of the new frame size.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	332 movl %eax,(%esp)
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	333
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	334 call __generic_morestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	335
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	336 movl %eax,%esp # Switch to the new stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	337 subl 8(%ebp),%eax # The end of the stack space.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	338 addl $BACKOFF,%eax # Back off 512 bytes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	339
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	340 .LEHB0:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	341 # FIXME: The offset must match
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	342 # TARGET_THREAD_SPLIT_STACK_OFFSET in
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	343 # gcc/config/i386/linux.h.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	344 movl %eax,%gs:0x30 # Save the new stack boundary.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	345
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	346 call __morestack_unblock_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	347
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	348 movl -12(%ebp),%edx # Restore registers.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	349 movl -16(%ebp),%ecx
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	350
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	351 movl 4(%ebp),%eax # Increment the return address
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	352 cmpb $0xc3,(%eax) # to skip the ret instruction;
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	353 je 1f # see above.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	354 addl $2,%eax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	355 1: inc %eax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	356
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	357 movl %eax,-12(%ebp) # Store return address in an
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	358 # unused slot.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	359
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	360 movl -8(%ebp),%eax # Restore the last register.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	361
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	362 call *-12(%ebp) # Call our caller!
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	363
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	364 # The caller will return here, as predicted.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	365
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	366 # Save the registers which may hold a return value. We
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	367 # assume that __generic_releasestack does not touch any
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	368 # floating point or vector registers.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	369 pushl %eax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	370 pushl %edx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	371
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	372 # Push the arguments to __generic_releasestack now so that the
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	373 # stack is at a 16-byte boundary for
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	374 # __morestack_block_signals.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	375 pushl $0 # Where the available space is returned.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	376 leal 0(%esp),%eax # Push its address.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	377 push %eax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	378
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	379 call __morestack_block_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	380
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	381 call __generic_releasestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	382
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	383 subl 4(%esp),%eax # Subtract available space.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	384 addl $BACKOFF,%eax # Back off 512 bytes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	385 .LEHE0:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	386 movl %eax,%gs:0x30 # Save the new stack boundary.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	387
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	388 addl $8,%esp # Remove values from stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	389
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	390 # We need to restore the old stack pointer, which is in %rbp,
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	391 # before we unblock signals. We also need to restore %eax and
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	392 # %edx after we unblock signals but before we return. Do this
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	393 # by moving %eax and %edx from the current stack to the old
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	394 # stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	395
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	396 popl %edx # Pop return value from current stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	397 popl %eax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	398
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	399 movl %ebp,%esp # Restore stack pointer.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	400
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	401 # As before, we now have %esp % 16 == 12.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	402
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	403 pushl %eax # Push return value on old stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	404 pushl %edx
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	405 subl $4,%esp # Align stack to 16-byte boundary.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	406
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	407 call __morestack_unblock_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	408
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	409 addl $4,%esp
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	410 popl %edx # Restore return value.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	411 popl %eax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	412
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	413 .cfi_remember_state
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	414
04ced10e8804 gcc 7 kono parents: 68 diff changeset	415 # We never changed %ebx, so we don't have to actually restore it.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	416 .cfi_restore %ebx
04ced10e8804 gcc 7 kono parents: 68 diff changeset	417
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	418 popl %ebp
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	419 .cfi_restore %ebp
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	420 .cfi_def_cfa %esp, 16
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	421 ret $8 # Return to caller, which will
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	422 # immediately return. Pop
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	423 # arguments as we go.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	424
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	425 # This is the cleanup code called by the stack unwinder when unwinding
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	426 # through the code between .LEHB0 and .LEHE0 above.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	427
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	428 .L1:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	429 .cfi_restore_state
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	430 subl $16,%esp # Maintain 16 byte alignment.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	431 movl %eax,4(%esp) # Save exception header.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	432 movl %ebp,(%esp) # Stack pointer after resume.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	433 call __generic_findstack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	434 movl %ebp,%ecx # Get the stack pointer.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	435 subl %eax,%ecx # Subtract available space.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	436 addl $BACKOFF,%ecx # Back off 512 bytes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	437 movl %ecx,%gs:0x30 # Save new stack boundary.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	438 movl 4(%esp),%eax # Function argument.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	439 movl %eax,(%esp)
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	440 #ifdef __PIC__
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	441 call __x86.get_pc_thunk.bx # %ebx may not be set up for us.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	442 addl $_GLOBAL_OFFSET_TABLE_, %ebx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	443 call _Unwind_Resume@PLT # Resume unwinding.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	444 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	445 call _Unwind_Resume
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	446 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	447
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	448 #else /* defined(__x86_64__) */
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	449
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	450
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	451 # The 64-bit __morestack function.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	452
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	453 # We use a cleanup to restore the stack guard if an exception
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	454 # is thrown through this code.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	455 #ifndef __PIC__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	456 .cfi_personality 0x3,__gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	457 .cfi_lsda 0x3,.LLSDA1
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	458 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	459 .cfi_personality 0x9b,DW.ref.__gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	460 .cfi_lsda 0x1b,.LLSDA1
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	461 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	462
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	463 # We will return a single return instruction, which will
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	464 # return to the caller of our caller. Let the unwinder skip
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	465 # that single return instruction, and just return to the real
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	466 # caller.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	467 .cfi_def_cfa %rsp,16
04ced10e8804 gcc 7 kono parents: 68 diff changeset	468
04ced10e8804 gcc 7 kono parents: 68 diff changeset	469 # Set up a normal backtrace.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	470 pushq %rbp
04ced10e8804 gcc 7 kono parents: 68 diff changeset	471 .cfi_adjust_cfa_offset 8
04ced10e8804 gcc 7 kono parents: 68 diff changeset	472 .cfi_offset %rbp, -24
04ced10e8804 gcc 7 kono parents: 68 diff changeset	473 movq %rsp, %rbp
04ced10e8804 gcc 7 kono parents: 68 diff changeset	474 .cfi_def_cfa_register %rbp
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	475
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	476 # In 64-bit mode the new stack frame size is passed in r10
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	477 # and the argument size is passed in r11.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	478
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	479 addq $BACKOFF,%r10 # Ask for backoff bytes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	480 pushq %r10 # Save new frame size.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	481
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	482 # In 64-bit mode the registers %rdi, %rsi, %rdx, %rcx, %r8,
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	483 # and %r9 may be used for parameters. We also preserve %rax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	484 # which the caller may use to hold %r10.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	485
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	486 pushq %rax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	487 pushq %rdi
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	488 pushq %rsi
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	489 pushq %rdx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	490 pushq %rcx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	491 pushq %r8
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	492 pushq %r9
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	493
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	494 pushq %r11
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	495
04ced10e8804 gcc 7 kono parents: 68 diff changeset	496 # We entered morestack with the stack pointer aligned to a
04ced10e8804 gcc 7 kono parents: 68 diff changeset	497 # 16-byte boundary (the call to morestack's caller used 8
04ced10e8804 gcc 7 kono parents: 68 diff changeset	498 # bytes, and the call to morestack used 8 bytes). We have now
04ced10e8804 gcc 7 kono parents: 68 diff changeset	499 # pushed 10 registers, so we are still aligned to a 16-byte
04ced10e8804 gcc 7 kono parents: 68 diff changeset	500 # boundary.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	501
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	502 call __morestack_block_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	503
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	504 leaq -8(%rbp),%rdi # Address of new frame size.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	505 leaq 24(%rbp),%rsi # The caller's parameters.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	506 popq %rdx # The size of the parameters.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	507
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	508 subq $8,%rsp # Align stack.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	509
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	510 call __generic_morestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	511
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	512 movq -8(%rbp),%r10 # Reload modified frame size
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	513 movq %rax,%rsp # Switch to the new stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	514 subq %r10,%rax # The end of the stack space.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	515 addq $BACKOFF,%rax # Back off 1024 bytes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	516
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	517 .LEHB0:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	518 # FIXME: The offset must match
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	519 # TARGET_THREAD_SPLIT_STACK_OFFSET in
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	520 # gcc/config/i386/linux64.h.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	521 # Macro to save the new stack boundary.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	522 #ifdef __LP64__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	523 #define X86_64_SAVE_NEW_STACK_BOUNDARY(reg) movq %r##reg,%fs:0x70
04ced10e8804 gcc 7 kono parents: 68 diff changeset	524 #else
04ced10e8804 gcc 7 kono parents: 68 diff changeset	525 #define X86_64_SAVE_NEW_STACK_BOUNDARY(reg) movl %e##reg,%fs:0x40
04ced10e8804 gcc 7 kono parents: 68 diff changeset	526 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	527 X86_64_SAVE_NEW_STACK_BOUNDARY (ax)
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	528
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	529 call __morestack_unblock_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	530
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	531 movq -24(%rbp),%rdi # Restore registers.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	532 movq -32(%rbp),%rsi
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	533 movq -40(%rbp),%rdx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	534 movq -48(%rbp),%rcx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	535 movq -56(%rbp),%r8
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	536 movq -64(%rbp),%r9
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	537
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	538 movq 8(%rbp),%r10 # Increment the return address
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	539 incq %r10 # to skip the ret instruction;
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	540 # see above.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	541
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	542 movq -16(%rbp),%rax # Restore caller's %rax.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	543
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	544 call *%r10 # Call our caller!
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	545
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	546 # The caller will return here, as predicted.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	547
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	548 # Save the registers which may hold a return value. We
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	549 # assume that __generic_releasestack does not touch any
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	550 # floating point or vector registers.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	551 pushq %rax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	552 pushq %rdx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	553
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	554 call __morestack_block_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	555
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	556 pushq $0 # For alignment.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	557 pushq $0 # Where the available space is returned.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	558 leaq 0(%rsp),%rdi # Pass its address.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	559
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	560 call __generic_releasestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	561
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	562 subq 0(%rsp),%rax # Subtract available space.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	563 addq $BACKOFF,%rax # Back off 1024 bytes.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	564 .LEHE0:
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	565 X86_64_SAVE_NEW_STACK_BOUNDARY (ax)
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	566
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	567 addq $16,%rsp # Remove values from stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	568
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	569 # We need to restore the old stack pointer, which is in %rbp,
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	570 # before we unblock signals. We also need to restore %rax and
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	571 # %rdx after we unblock signals but before we return. Do this
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	572 # by moving %rax and %rdx from the current stack to the old
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	573 # stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	574
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	575 popq %rdx # Pop return value from current stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	576 popq %rax
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	577
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	578 movq %rbp,%rsp # Restore stack pointer.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	579
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	580 # Now (%rsp & 16) == 8.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	581
04ced10e8804 gcc 7 kono parents: 68 diff changeset	582 subq $8,%rsp # For alignment.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	583 pushq %rax # Push return value on old stack.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	584 pushq %rdx
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	585
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	586 call __morestack_unblock_signals
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	587
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	588 popq %rdx # Restore return value.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	589 popq %rax
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	590 addq $8,%rsp
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	591
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	592 .cfi_remember_state
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	593 popq %rbp
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	594 .cfi_restore %rbp
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	595 .cfi_def_cfa %rsp, 16
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	596 ret # Return to caller, which will
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	597 # immediately return.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	598
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	599 # This is the cleanup code called by the stack unwinder when unwinding
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	600 # through the code between .LEHB0 and .LEHE0 above.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	601
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	602 .L1:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	603 .cfi_restore_state
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	604 subq $16,%rsp # Maintain 16 byte alignment.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	605 movq %rax,(%rsp) # Save exception header.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	606 movq %rbp,%rdi # Stack pointer after resume.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	607 call __generic_findstack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	608 movq %rbp,%rcx # Get the stack pointer.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	609 subq %rax,%rcx # Subtract available space.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	610 addq $BACKOFF,%rcx # Back off 1024 bytes.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	611 X86_64_SAVE_NEW_STACK_BOUNDARY (cx)
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	612 movq (%rsp),%rdi # Restore exception data for call.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	613 #ifdef __PIC__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	614 call _Unwind_Resume@PLT # Resume unwinding.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	615 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	616 call _Unwind_Resume # Resume unwinding.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	617 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	618
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	619 #endif /* defined(__x86_64__) */
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	620
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	621 .cfi_endproc
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	622 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	623 .size __morestack, . - __morestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	624 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	625
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	626 #if !defined(__x86_64__) && defined(__PIC__)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	627 # Output the thunk to get PC into bx, since we use it above.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	628 .section .text.__x86.get_pc_thunk.bx,"axG",@progbits,__x86.get_pc_thunk.bx,comdat
04ced10e8804 gcc 7 kono parents: 68 diff changeset	629 .globl __x86.get_pc_thunk.bx
04ced10e8804 gcc 7 kono parents: 68 diff changeset	630 .hidden __x86.get_pc_thunk.bx
04ced10e8804 gcc 7 kono parents: 68 diff changeset	631 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	632 .type __x86.get_pc_thunk.bx, @function
04ced10e8804 gcc 7 kono parents: 68 diff changeset	633 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	634 __x86.get_pc_thunk.bx:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	635 .cfi_startproc
04ced10e8804 gcc 7 kono parents: 68 diff changeset	636 movl (%esp), %ebx
04ced10e8804 gcc 7 kono parents: 68 diff changeset	637 ret
04ced10e8804 gcc 7 kono parents: 68 diff changeset	638 .cfi_endproc
04ced10e8804 gcc 7 kono parents: 68 diff changeset	639 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	640 .size __x86.get_pc_thunk.bx, . - __x86.get_pc_thunk.bx
04ced10e8804 gcc 7 kono parents: 68 diff changeset	641 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	642 #endif
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	643
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	644 # The exception table. This tells the personality routine to execute
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	645 # the exception handler.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	646
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	647 .section .gcc_except_table,"a",@progbits
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	648 .align 4
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	649 .LLSDA1:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	650 .byte 0xff # @LPStart format (omit)
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	651 .byte 0xff # @TType format (omit)
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	652 .byte 0x1 # call-site format (uleb128)
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	653 .uleb128 .LLSDACSE1-.LLSDACSB1 # Call-site table length
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	654 .LLSDACSB1:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	655 .uleb128 .LEHB0-.LFB1 # region 0 start
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	656 .uleb128 .LEHE0-.LEHB0 # length
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	657 .uleb128 .L1-.LFB1 # landing pad
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	658 .uleb128 0 # action
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	659 .LLSDACSE1:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	660
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	661
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	662 .global __gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	663 #ifdef __PIC__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	664 # Build a position independent reference to the basic
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	665 # personality function.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	666 .hidden DW.ref.__gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	667 .weak DW.ref.__gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	668 .section .data.DW.ref.__gcc_personality_v0,"awG",@progbits,DW.ref.__gcc_personality_v0,comdat
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	669 .type DW.ref.__gcc_personality_v0, @object
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	670 DW.ref.__gcc_personality_v0:
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	671 #ifndef __LP64__
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	672 .align 4
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	673 .size DW.ref.__gcc_personality_v0, 4
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	674 .long __gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	675 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	676 .align 8
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	677 .size DW.ref.__gcc_personality_v0, 8
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	678 .quad __gcc_personality_v0
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	679 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	680 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	681
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	682 #if defined __x86_64__ && defined __LP64__
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	683
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	684 # This entry point is used for the large model. With this entry point
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	685 # the upper 32 bits of %r10 hold the argument size and the lower 32
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	686 # bits hold the new stack frame size. There doesn't seem to be a way
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	687 # to know in the assembler code that we are assembling for the large
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	688 # model, and there doesn't seem to be a large model multilib anyhow.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	689 # If one is developed, then the non-PIC code is probably OK since we
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	690 # will probably be close to the morestack code, but the PIC code
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	691 # almost certainly needs to be changed. FIXME.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	692
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	693 .text
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	694 .global __morestack_large_model
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	695 .hidden __morestack_large_model
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	696
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	697 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	698 .type __morestack_large_model,@function
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	699 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	700
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	701 __morestack_large_model:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	702
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	703 .cfi_startproc
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	704
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	705 movq %r10, %r11
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	706 andl $0xffffffff, %r10d
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	707 sarq $32, %r11
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	708 jmp __morestack
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	709
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	710 .cfi_endproc
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	711 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	712 .size __morestack_large_model, . - __morestack_large_model
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	713 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	714
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	715 #endif /* __x86_64__ && __LP64__ */
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	716
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	717 # Initialize the stack test value when the program starts or when a
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	718 # new thread starts. We don't know how large the main stack is, so we
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	719 # guess conservatively. We might be able to use getrlimit here.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	720
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	721 .text
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	722 .global __stack_split_initialize
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	723 .hidden __stack_split_initialize
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	724
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	725 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	726 .type __stack_split_initialize, @function
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	727 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	728
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	729 __stack_split_initialize:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	730
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	731 #ifndef __x86_64__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	732
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	733 leal -16000(%esp),%eax # We should have at least 16K.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	734 movl %eax,%gs:0x30
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	735 subl $4,%esp # Align stack.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	736 pushl $16000
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	737 pushl %esp
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	738 #ifdef __PIC__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	739 call __generic_morestack_set_initial_sp@PLT
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	740 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	741 call __generic_morestack_set_initial_sp
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	742 #endif
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	743 addl $12,%esp
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	744 ret
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	745
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	746 #else /* defined(__x86_64__) */
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	747
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	748 leaq -16000(%rsp),%rax # We should have at least 16K.
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	749 X86_64_SAVE_NEW_STACK_BOUNDARY (ax)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	750 subq $8,%rsp # Align stack.
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	751 movq %rsp,%rdi
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	752 movq $16000,%rsi
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	753 #ifdef __PIC__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	754 call __generic_morestack_set_initial_sp@PLT
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	755 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	756 call __generic_morestack_set_initial_sp
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	757 #endif
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	758 addq $8,%rsp
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	759 ret
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	760
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	761 #endif /* defined(__x86_64__) */
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	762
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	763 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	764 .size __stack_split_initialize, . - __stack_split_initialize
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	765 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	766
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	767 # Routines to get and set the guard, for __splitstack_getcontext,
04ced10e8804 gcc 7 kono parents: 68 diff changeset	768 # __splitstack_setcontext, and __splitstack_makecontext.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	769
04ced10e8804 gcc 7 kono parents: 68 diff changeset	770 # void *__morestack_get_guard (void) returns the current stack guard.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	771 .text
04ced10e8804 gcc 7 kono parents: 68 diff changeset	772 .global __morestack_get_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	773 .hidden __morestack_get_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	774
04ced10e8804 gcc 7 kono parents: 68 diff changeset	775 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	776 .type __morestack_get_guard,@function
04ced10e8804 gcc 7 kono parents: 68 diff changeset	777 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	778
04ced10e8804 gcc 7 kono parents: 68 diff changeset	779 __morestack_get_guard:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	780
04ced10e8804 gcc 7 kono parents: 68 diff changeset	781 #ifndef __x86_64__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	782 movl %gs:0x30,%eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	783 #else
04ced10e8804 gcc 7 kono parents: 68 diff changeset	784 #ifdef __LP64__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	785 movq %fs:0x70,%rax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	786 #else
04ced10e8804 gcc 7 kono parents: 68 diff changeset	787 movl %fs:0x40,%eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	788 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	789 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	790 ret
04ced10e8804 gcc 7 kono parents: 68 diff changeset	791
04ced10e8804 gcc 7 kono parents: 68 diff changeset	792 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	793 .size __morestack_get_guard, . - __morestack_get_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	794 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	795
04ced10e8804 gcc 7 kono parents: 68 diff changeset	796 # void __morestack_set_guard (void *) sets the stack guard.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	797 .global __morestack_set_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	798 .hidden __morestack_set_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	799
04ced10e8804 gcc 7 kono parents: 68 diff changeset	800 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	801 .type __morestack_set_guard,@function
04ced10e8804 gcc 7 kono parents: 68 diff changeset	802 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	803
04ced10e8804 gcc 7 kono parents: 68 diff changeset	804 __morestack_set_guard:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	805
04ced10e8804 gcc 7 kono parents: 68 diff changeset	806 #ifndef __x86_64__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	807 movl 4(%esp),%eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	808 movl %eax,%gs:0x30
04ced10e8804 gcc 7 kono parents: 68 diff changeset	809 #else
04ced10e8804 gcc 7 kono parents: 68 diff changeset	810 X86_64_SAVE_NEW_STACK_BOUNDARY (di)
04ced10e8804 gcc 7 kono parents: 68 diff changeset	811 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	812 ret
04ced10e8804 gcc 7 kono parents: 68 diff changeset	813
04ced10e8804 gcc 7 kono parents: 68 diff changeset	814 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	815 .size __morestack_set_guard, . - __morestack_set_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	816 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	817
04ced10e8804 gcc 7 kono parents: 68 diff changeset	818 # void __morestack_make_guard (void , size_t) returns the stack
04ced10e8804 gcc 7 kono parents: 68 diff changeset	819 # guard value for a stack.
04ced10e8804 gcc 7 kono parents: 68 diff changeset	820 .global __morestack_make_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	821 .hidden __morestack_make_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	822
04ced10e8804 gcc 7 kono parents: 68 diff changeset	823 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	824 .type __morestack_make_guard,@function
04ced10e8804 gcc 7 kono parents: 68 diff changeset	825 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	826
04ced10e8804 gcc 7 kono parents: 68 diff changeset	827 __morestack_make_guard:
04ced10e8804 gcc 7 kono parents: 68 diff changeset	828
04ced10e8804 gcc 7 kono parents: 68 diff changeset	829 #ifndef __x86_64__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	830 movl 4(%esp),%eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	831 subl 8(%esp),%eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	832 addl $BACKOFF,%eax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	833 #else
04ced10e8804 gcc 7 kono parents: 68 diff changeset	834 subq %rsi,%rdi
04ced10e8804 gcc 7 kono parents: 68 diff changeset	835 addq $BACKOFF,%rdi
04ced10e8804 gcc 7 kono parents: 68 diff changeset	836 movq %rdi,%rax
04ced10e8804 gcc 7 kono parents: 68 diff changeset	837 #endif
04ced10e8804 gcc 7 kono parents: 68 diff changeset	838 ret
04ced10e8804 gcc 7 kono parents: 68 diff changeset	839
04ced10e8804 gcc 7 kono parents: 68 diff changeset	840 #ifdef __ELF__
04ced10e8804 gcc 7 kono parents: 68 diff changeset	841 .size __morestack_make_guard, . - __morestack_make_guard
04ced10e8804 gcc 7 kono parents: 68 diff changeset	842 #endif
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	843
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	844 # Make __stack_split_initialize a high priority constructor. FIXME:
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	845 # This is ELF specific.
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	846
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	847 .section .ctors.65535,"aw",@progbits
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	848
111 04ced10e8804 gcc 7 kono parents: 68 diff changeset	849 #ifndef __LP64__
68 561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	850 .align 4
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	851 .long __stack_split_initialize
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	852 .long __morestack_load_mmap
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	853 #else
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	854 .align 8
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	855 .quad __stack_split_initialize
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	856 .quad __morestack_load_mmap
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	857 #endif
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	858
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	859 #ifdef __ELF__
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	860 .section .note.GNU-stack,"",@progbits
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	861 .section .note.GNU-split-stack,"",@progbits
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	862 .section .note.GNU-no-split-stack,"",@progbits
561a7518be6b update gcc-4.6 Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	863 #endif

Mercurial > hg > CbC > CbC_gcc

annotate libgcc/config/i386/morestack.S @ 111:04ced10e8804