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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* Assembler and syscall macros. OpenRISC version.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#ifndef _LINUX_OR1K_SYSDEP_H
#define _LINUX_OR1K_SYSDEP_H 1
#include <sysdeps/or1k/sysdep.h>
#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
#include <tls.h>
/* "workarounds" for generic code needing to handle 64-bit time_t. */
#undef __NR_clock_getres
#undef __NR_futex
#undef __NR_ppoll
#undef __NR_pselect6
#undef __NR_recvmmsg
#undef __NR_rt_sigtimedwait
#undef __NR_semtimedop
#undef __NR_utimensat
/* Fix sysdeps/unix/sysv/linux/clock_getcpuclockid.c. */
#define __NR_clock_getres __NR_clock_getres_time64
/* Fix sysdeps/nptl/lowlevellock-futex.h. */
#define __NR_futex __NR_futex_time64
/* Fix sysdeps/unix/sysv/linux/pause.c. */
#define __NR_ppoll __NR_ppoll_time64
/* Fix sysdeps/unix/sysv/linux/select.c. */
#define __NR_pselect6 __NR_pselect6_time64
/* Fix sysdeps/unix/sysv/linux/recvmmsg.c. */
#define __NR_recvmmsg __NR_recvmmsg_time64
/* Fix sysdeps/unix/sysv/linux/sigtimedwait.c. */
#define __NR_rt_sigtimedwait __NR_rt_sigtimedwait_time64
/* Fix sysdeps/unix/sysv/linux/semtimedop.c. */
#define __NR_semtimedop __NR_semtimedop_time64
/* Hack sysdeps/unix/sysv/linux/generic/utimes.c. */
#define __NR_utimensat __NR_utimensat_time64
#undef SYS_ify
#define SYS_ify(syscall_name) (__NR_##syscall_name)
/* Linux uses a negative return value to indicate syscall errors,
unlike most Unices, which use the condition codes' carry flag.
Since version 2.1 the return value of a system call might be
negative even if the call succeeded. E.g., the lseek system call
might return a large offset. Therefore we must not anymore test
for < 0, but test for a real error by making sure the value in R0
is a real error number. Linus said he will make sure the no syscall
returns a value in -1 .. -4095 as a valid result so we can safely
test with -4095. */
#ifdef __ASSEMBLER__
/* Macros used in syscall-template.S */
#define ret l.jr r9; l.nop
#define ret_NOERRNO l.jr r9; l.nop
#undef DO_CALL
#define DO_CALL(syscall_name) \
l.addi r11, r0, SYS_ify (syscall_name); \
l.sys 1; \
l.nop
#undef PSEUDO
#define PSEUDO(name, syscall_name, args) \
ENTRY (name); \
DO_CALL(syscall_name); \
/* if -4096 < ret < 0 holds, it's an error */ \
l.sfgeui r11, 0xf001; \
l.bf L(pseudo_end); \
l.nop
#undef PSEUDO_NOERRNO
#define PSEUDO_NOERRNO(name, syscall_name, args) \
ENTRY (name); \
DO_CALL(syscall_name)
#undef PSEUDO_END
#define PSEUDO_END(name) \
L(pseudo_end): \
l.j SYSCALL_ERROR_NAME; \
l.ori r3,r11,0; \
END (name)
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name) \
END (name)
#ifndef PIC
/* For static code, on error jump to __syscall_error directly. */
# define SYSCALL_ERROR_NAME __syscall_error
#elif !IS_IN (libc)
/* Use the internal name for libc shared objects. */
# define SYSCALL_ERROR_NAME __GI___syscall_error
#else
/* Otherwise, on error do a full PLT jump. */
# define SYSCALL_ERROR_NAME plt(__syscall_error)
#endif
#else /* not __ASSEMBLER__ */
#include <errno.h>
extern long int __syscall_error (long int neg_errno);
/* Pointer mangling is not yet supported for or1k. */
#define PTR_MANGLE(var) (void) (var)
#define PTR_DEMANGLE(var) (void) (var)
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, nr, args...) \
INTERNAL_SYSCALL_NCS (SYS_ify (name), nr, args)
/* The _NCS variant allows non-constant syscall numbers. */
#undef INTERNAL_SYSCALL_NCS
#define INTERNAL_SYSCALL_NCS(number, nr, args...) \
({ unsigned long int __sys_result; \
{ \
long int _sc_ret = (long int) number; \
LOAD_ARGS_##nr (args) \
register long int __sc_ret __asm__ ("r11") = _sc_ret; \
__asm__ __volatile__ ("l.sys 1\n\t" \
" l.nop\n\t" \
: "+r" (__sc_ret) \
: ASM_ARGS_##nr \
: ASM_CLOBBERS_##nr \
"r12", "r13", "r15", "r17", "r19", \
"r21", "r23", "r25", "r27", "r29", \
"r31", "memory"); \
__sys_result = __sc_ret; \
} \
(long int) __sys_result; })
/* From here on we have nested macros that generate code for
setting up syscall arguments. */
#define LOAD_ARGS_0()
#define ASM_ARGS_0
#define ASM_CLOBBERS_0 "r3", ASM_CLOBBERS_1
#define LOAD_ARGS_1(a) \
long int _a = (long int)(a); \
register long int __a __asm__ ("r3") = _a;
#define ASM_ARGS_1 "r" (__a)
#define ASM_CLOBBERS_1 "r4", ASM_CLOBBERS_2
#define LOAD_ARGS_2(a, b) \
long int _b = (long int)(b); \
LOAD_ARGS_1 (a) \
register long int __b __asm__ ("r4") = _b;
#define ASM_ARGS_2 ASM_ARGS_1, "r" (__b)
#define ASM_CLOBBERS_2 "r5", ASM_CLOBBERS_3
#define LOAD_ARGS_3(a, b, c) \
long int _c = (long int)(c); \
LOAD_ARGS_2 (a, b) \
register long int __c __asm__ ("r5") = _c;
#define ASM_ARGS_3 ASM_ARGS_2, "r" (__c)
#define ASM_CLOBBERS_3 "r6", ASM_CLOBBERS_4
#define LOAD_ARGS_4(a, b, c, d) \
LOAD_ARGS_3 (a, b, c) \
long int _d = (long int)(d); \
register long int __d __asm__ ("r6") = _d;
#define ASM_ARGS_4 ASM_ARGS_3, "r" (__d)
#define ASM_CLOBBERS_4 "r7", ASM_CLOBBERS_5
#define LOAD_ARGS_5(a, b, c, d, e) \
long int _e = (long int)(e); \
LOAD_ARGS_4 (a, b, c, d) \
register long int __e __asm__ ("r7") = _e;
#define ASM_ARGS_5 ASM_ARGS_4, "r" (__e)
#define ASM_CLOBBERS_5 "r8", ASM_CLOBBERS_6
#define LOAD_ARGS_6(a, b, c, d, e, f) \
long int _f = (long int)(f); \
LOAD_ARGS_5 (a, b, c, d, e) \
register long int __f __asm__ ("r8") = _f;
#define ASM_ARGS_6 ASM_ARGS_5, "r" (__f)
#define ASM_CLOBBERS_6
#endif /* not __ASSEMBLER__ */
#endif /* linux/or1k/sysdep.h */
|
