summaryrefslogtreecommitdiff
path: root/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
blob: 5f42c8c282ed68d5b2aacacd874834d96bdb36fd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/* Copyright (C) 1997-2013 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, January 1997.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _LINUX_SPARC32_SYSDEP_H
#define _LINUX_SPARC32_SYSDEP_H 1

#include <sysdeps/unix/sysv/linux/sparc/sysdep.h>

#ifdef IS_IN_rtld
# include <dl-sysdep.h>		/* Defines RTLD_PRIVATE_ERRNO.  */
#endif
#include <tls.h>

#undef SYS_ify
#define SYS_ify(syscall_name) __NR_##syscall_name

#ifdef __ASSEMBLER__

#define LOADSYSCALL(x) mov __NR_##x, %g1

#undef PSEUDO
#define PSEUDO(name, syscall_name, args)	\
	.text;					\
ENTRY(name);					\
	LOADSYSCALL(syscall_name);		\
	ta		0x10;			\
	bcc		1f;			\
	 nop;					\
	SYSCALL_ERROR_HANDLER			\
1:

#undef PSEUDO_NOERRNO
#define PSEUDO_NOERRNO(name, syscall_name, args)\
	.text;					\
ENTRY(name);					\
	LOADSYSCALL(syscall_name);		\
	ta		0x10;

#undef PSEUDO_ERRVAL
#define PSEUDO_ERRVAL(name, syscall_name, args)	\
	.text;					\
ENTRY(name);					\
	LOADSYSCALL(syscall_name);		\
	ta		0x10;

#undef PSEUDO_END
#define PSEUDO_END(name)			\
	END(name)

#ifndef PIC
# define SYSCALL_ERROR_HANDLER			\
	mov	%o7, %g1;			\
	call	__syscall_error;		\
	 mov	%g1, %o7;
#else
# if RTLD_PRIVATE_ERRNO
#  define SYSCALL_ERROR_HANDLER			\
0:	SETUP_PIC_REG_LEAF(o2,g1)		\
	sethi	%gdop_hix22(rtld_errno), %g1;	\
	xor	%g1, %gdop_lox10(rtld_errno), %g1;\
	ld	[%o2 + %g1], %g1, %gdop(rtld_errno); \
	st	%o0, [%g1];			\
	jmp	%o7 + 8;			\
	 mov	-1, %o0;
# elif defined _LIBC_REENTRANT

#  ifndef NOT_IN_libc
#   define SYSCALL_ERROR_ERRNO __libc_errno
#  else
#   define SYSCALL_ERROR_ERRNO errno
#  endif
#  define SYSCALL_ERROR_HANDLER					\
0:	SETUP_PIC_REG_LEAF(o2,g1)				\
	sethi	%tie_hi22(SYSCALL_ERROR_ERRNO), %g1;		\
	add	%g1, %tie_lo10(SYSCALL_ERROR_ERRNO), %g1;	\
	ld	[%o2 + %g1], %g1, %tie_ld(SYSCALL_ERROR_ERRNO);	\
	st	%o0, [%g7 + %g1];				\
	jmp	%o7 + 8;					\
	 mov	-1, %o0;
# else
#  define SYSCALL_ERROR_HANDLER		\
0:	SETUP_PIC_REG_LEAF(o2,g1)	\
	sethi	%gdop_hix22(errno), %g1;\
	xor	%g1, %gdop_lox10(errno), %g1;\
	ld	[%o2 + %g1], %g1, %gdop(errno);\
	st	%o0, [%g1];		\
	jmp	%o7 + 8;		\
	 mov	-1, %o0;
# endif	/* _LIBC_REENTRANT */
#endif	/* PIC */


#else  /* __ASSEMBLER__ */

#define __SYSCALL_STRING						\
	"ta	0x10;"							\
	"bcc	1f;"							\
	" mov	0, %%g1;"						\
	"sub	%%g0, %%o0, %%o0;"					\
	"mov	1, %%g1;"						\
	"1:"

#define __SYSCALL_CLOBBERS						\
	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",			\
	"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",		\
	"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",		\
	"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",		\
	"cc", "memory"

#endif	/* __ASSEMBLER__ */

/* Pointer mangling support.  */
#if defined NOT_IN_libc && defined IS_IN_rtld
/* We cannot use the thread descriptor because in ld.so we use setjmp
   earlier than the descriptor is initialized.  */
#else
# ifdef __ASSEMBLER__
#  define PTR_MANGLE(dreg, reg, tmpreg) \
  ld	[%g7 + POINTER_GUARD], tmpreg; \
  xor	reg, tmpreg, dreg
#  define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg)
#  define PTR_MANGLE2(dreg, reg, tmpreg) \
  xor	reg, tmpreg, dreg
#  define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg)
# else
#  define PTR_MANGLE(var) \
  (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
#  define PTR_DEMANGLE(var)     PTR_MANGLE (var)
# endif
#endif

#endif /* linux/sparc/sysdep.h */