1/* $NetBSD: SYS.h,v 1.19 2009/12/14 01:07:41 matt Exp $ */
2/* $FreeBSD: head/lib/libc/mips/SYS.h 209231 2010-06-16 12:55:14Z jchandra $ */
3
4/*-
5 * Copyright (c) 1996 Jonathan Stone
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
--- 63 unchanged lines hidden (view full) ---
74 * If compiling for shared libs, Emit sysV ABI PIC segment pseudo-ops.
75 *
76 * i) Emit .abicalls before .LEAF entrypoint, and .cpload/.cprestore after.
77 * ii) Do interprocedure jumps indirectly via t9, with the side-effect of
78 * preserving the callee's entry address in t9.
79 */
80#ifdef __ABICALLS__
81 .abicalls
82# if defined(__mips_o32) || defined(__mips_o64)
83# define PIC_PROLOGUE(x) SETUP_GP
84# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); jr t9
85# define PIC_RETURN() j ra
86# else
87# define PIC_PROLOGUE(x) SETUP_GP64(t3, x)
88# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); RESTORE_GP64; jr t9
89# define PIC_RETURN() RESTORE_GP64; j ra
90# endif
91#else
92# define PIC_PROLOGUE(x)
93# define PIC_TAILCALL(l) j _C_LABEL(l)
94# define PIC_RETURN()
95#endif /* __ABICALLS__ */
96
97# define SYSTRAP(x) li v0,SYS_ ## x; syscall;
98
99/*
100 * Do a syscall that cannot fail (sync, get{p,u,g,eu,eg)id)
101 */
102#define RSYSCALL_NOERROR(x) \
103 PSEUDO_NOERROR(x)
104
105/*
106 * Do a normal syscall.
107 */
108#define RSYSCALL(x) \
109 PSEUDO(x)
110
111/*
112 * Do a renamed or pseudo syscall (e.g., _exit()), where the entrypoint
113 * and syscall name are not the same.
114 */
115#define PSEUDO_NOERROR(x) \
116LEAF(__sys_ ## x); \
117 .weak _C_LABEL(x); \
118 _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
119 .weak _C_LABEL(__CONCAT(_,x)); \
120 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
121 SYSTRAP(x); \
122 j ra; \
123 END(__sys_ ## x)
124
125#define PSEUDO(x) \
126LEAF(__sys_ ## x); \
127 .weak _C_LABEL(x); \
128 _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
129 .weak _C_LABEL(__CONCAT(_,x)); \
130 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
131 PIC_PROLOGUE(__sys_ ## x); \
132 SYSTRAP(x); \
133 bne a3,zero,err; \
134 PIC_RETURN(); \
135err: \
136 PIC_TAILCALL(__cerror); \
137END(__sys_ ## x)
2/* $FreeBSD: head/lib/libc/mips/SYS.h 209231 2010-06-16 12:55:14Z jchandra $ */
3
4/*-
5 * Copyright (c) 1996 Jonathan Stone
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
--- 63 unchanged lines hidden (view full) ---
74 * If compiling for shared libs, Emit sysV ABI PIC segment pseudo-ops.
75 *
76 * i) Emit .abicalls before .LEAF entrypoint, and .cpload/.cprestore after.
77 * ii) Do interprocedure jumps indirectly via t9, with the side-effect of
78 * preserving the callee's entry address in t9.
79 */
80#ifdef __ABICALLS__
81 .abicalls
82# if defined(__mips_o32) || defined(__mips_o64)
83# define PIC_PROLOGUE(x) SETUP_GP
84# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); jr t9
85# define PIC_RETURN() j ra
86# else
87# define PIC_PROLOGUE(x) SETUP_GP64(t3, x)
88# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); RESTORE_GP64; jr t9
89# define PIC_RETURN() RESTORE_GP64; j ra
90# endif
91#else
92# define PIC_PROLOGUE(x)
93# define PIC_TAILCALL(l) j _C_LABEL(l)
94# define PIC_RETURN()
95#endif /* __ABICALLS__ */
96
97# define SYSTRAP(x) li v0,SYS_ ## x; syscall;
98
99/*
100 * Do a syscall that cannot fail (sync, get{p,u,g,eu,eg)id)
101 */
102#define RSYSCALL_NOERROR(x) \
103 PSEUDO_NOERROR(x)
104
105/*
106 * Do a normal syscall.
107 */
108#define RSYSCALL(x) \
109 PSEUDO(x)
110
111/*
112 * Do a renamed or pseudo syscall (e.g., _exit()), where the entrypoint
113 * and syscall name are not the same.
114 */
115#define PSEUDO_NOERROR(x) \
116LEAF(__sys_ ## x); \
117 .weak _C_LABEL(x); \
118 _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
119 .weak _C_LABEL(__CONCAT(_,x)); \
120 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
121 SYSTRAP(x); \
122 j ra; \
123 END(__sys_ ## x)
124
125#define PSEUDO(x) \
126LEAF(__sys_ ## x); \
127 .weak _C_LABEL(x); \
128 _C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
129 .weak _C_LABEL(__CONCAT(_,x)); \
130 _C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
131 PIC_PROLOGUE(__sys_ ## x); \
132 SYSTRAP(x); \
133 bne a3,zero,err; \
134 PIC_RETURN(); \
135err: \
136 PIC_TAILCALL(__cerror); \
137END(__sys_ ## x)