Warning: That file was not part of the compilation database. It may have many parsing errors.

1/* Machine-specific calling sequence for `mcount' profiling function. alpha
2 Copyright (C) 1995-2019 Free Software Foundation, Inc.
3 Contributed by David Mosberger (davidm@cs.arizona.edu).
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library. If not, see
18 <http://www.gnu.org/licenses/>. */
19
20/* Assembly stub to invoke _mcount(). Compiler generated code calls
21 this stub after executing a function's prologue and without saving any
22 registers. It is therefore necessary to preserve a0..a5 as they may
23 contain function arguments. To work correctly with frame- less
24 functions, it is also necessary to preserve ra. Finally, division
25 routines are invoked with a special calling convention and the
26 compiler treats those calls as if they were instructions. In
27 particular, it doesn't save any of the temporary registers (caller
28 saved registers). It is therefore necessary to preserve all
29 caller-saved registers as well.
30
31 Upon entering _mcount, register $at holds the return address and ra
32 holds the return address of the function's caller (selfpc and frompc,
33 respectively in gmon.c language...). */
34
35#include <sysdep.h>
36
37 .set noat
38 .set noreorder
39
40LEAF(_mcount, 0xb0)
41 subq sp, 0xb0, sp
42 .prologue 0
43 stq a0, 0x00(sp)
44 mov ra, a0 # a0 = caller-pc
45 stq a1, 0x08(sp)
46 mov $at, a1 # a1 = self-pc
47 stq $at, 0x10(sp)
48
49 stq a2, 0x18(sp)
50 stq a3, 0x20(sp)
51 stq a4, 0x28(sp)
52 stq a5, 0x30(sp)
53 stq ra, 0x38(sp)
54 stq gp, 0x40(sp)
55
56 br gp, 1f
571: ldgp gp, 0(gp)
58
59 stq t0, 0x48(sp)
60 stq t1, 0x50(sp)
61 stq t2, 0x58(sp)
62 stq t3, 0x60(sp)
63 stq t4, 0x68(sp)
64 stq t5, 0x70(sp)
65 stq t6, 0x78(sp)
66
67 stq t7, 0x80(sp)
68 stq t8, 0x88(sp)
69 stq t9, 0x90(sp)
70 stq t10, 0x98(sp)
71 stq t11, 0xa0(sp)
72 stq v0, 0xa8(sp)
73
74 jsr ra, __mcount
75
76 ldq a0, 0x00(sp)
77 ldq a1, 0x08(sp)
78 ldq $at, 0x10(sp) # restore self-pc
79 ldq a2, 0x18(sp)
80 ldq a3, 0x20(sp)
81 ldq a4, 0x28(sp)
82 ldq a5, 0x30(sp)
83 ldq ra, 0x38(sp)
84 ldq gp, 0x40(sp)
85 mov $at, pv # make pv point to return address
86 ldq t0, 0x48(sp) # this is important under OSF/1 to
87 ldq t1, 0x50(sp) # ensure that the code that we return
88 ldq t2, 0x58(sp) # can correctly compute its gp
89 ldq t3, 0x60(sp)
90 ldq t4, 0x68(sp)
91 ldq t5, 0x70(sp)
92 ldq t6, 0x78(sp)
93 ldq t7, 0x80(sp)
94 ldq t8, 0x88(sp)
95 ldq t9, 0x90(sp)
96 ldq t10, 0x98(sp)
97 ldq t11, 0xa0(sp)
98 ldq v0, 0xa8(sp)
99
100 addq sp, 0xb0, sp
101 ret zero,($at),1
102
103 END(_mcount)
104
105weak_alias (_mcount, mcount)
106

Warning: That file was not part of the compilation database. It may have many parsing errors.