1 /* Assembly macros for 32-bit PowerPC.
2 Copyright (C) 1999-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 #include <sysdeps/powerpc/sysdep.h>
23 /* If compiled for profiling, call `_mcount' at the start of each
26 /* The mcount code relies on a the return address being on the stack
27 to locate our caller and so it can restore it; so store one just
29 # define CALL_MCOUNT \
33 bl JUMPTARGET(_mcount);
35 # define CALL_MCOUNT /* Do nothing. */
39 .globl C_SYMBOL_NAME(name); \
40 .type C_SYMBOL_NAME(name),@function; \
46 #define ENTRY_TOCLESS(name) ENTRY(name)
48 /* helper macro for accessing the 32-bit powerpc GOT. */
50 #define SETUP_GOT_ACCESS(regname,GOT_LABEL) \
51 bcl 20,31,GOT_LABEL ; \
55 #define EALIGN_W_0 /* No words to insert. */
56 #define EALIGN_W_1 nop
57 #define EALIGN_W_2 nop;nop
58 #define EALIGN_W_3 nop;nop;nop
59 #define EALIGN_W_4 EALIGN_W_3;nop
60 #define EALIGN_W_5 EALIGN_W_4;nop
61 #define EALIGN_W_6 EALIGN_W_5;nop
62 #define EALIGN_W_7 EALIGN_W_6;nop
64 /* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes
65 past a 2^align boundary. */
67 # define EALIGN(name, alignt, words) \
68 .globl C_SYMBOL_NAME(name); \
69 .type C_SYMBOL_NAME(name),@function; \
75 .align ALIGNARG(alignt); \
79 # define EALIGN(name, alignt, words) \
80 .globl C_SYMBOL_NAME(name); \
81 .type C_SYMBOL_NAME(name),@function; \
82 .align ALIGNARG(alignt); \
91 ASM_SIZE_DIRECTIVE(name)
93 #define DO_CALL(syscall) \
99 # define JUMPTARGET(name) name##@plt
101 # define JUMPTARGET(name) name
104 #if defined SHARED && defined PIC && !defined NO_HIDDEN
105 # undef HIDDEN_JUMPTARGET
106 # define HIDDEN_JUMPTARGET(name) __GI_##name##@local
109 #define PSEUDO(name, syscall_name, args) \
112 DO_CALL (SYS_ify (syscall_name));
116 b __syscall_error@local
117 #define ret PSEUDO_RET
120 #define PSEUDO_END(name) \
123 #define PSEUDO_NOERRNO(name, syscall_name, args) \
126 DO_CALL (SYS_ify (syscall_name));
128 #define PSEUDO_RET_NOERRNO \
130 #define ret_NOERRNO PSEUDO_RET_NOERRNO
132 #undef PSEUDO_END_NOERRNO
133 #define PSEUDO_END_NOERRNO(name) \
136 #define PSEUDO_ERRVAL(name, syscall_name, args) \
139 DO_CALL (SYS_ify (syscall_name));
141 #define PSEUDO_RET_ERRVAL \
143 #define ret_ERRVAL PSEUDO_RET_ERRVAL
145 #undef PSEUDO_END_ERRVAL
146 #define PSEUDO_END_ERRVAL(name) \
149 /* Local labels stripped out by the linker. */
153 #define XGLUE(a,b) a##b
154 #define GLUE(a,b) XGLUE (a,b)
155 #define GENERATE_GOT_LABEL(name) GLUE (.got_label, name)
157 /* Label in text section. */
158 #define C_TEXT(name) name
160 /* Read the value of member from rtld_global_ro. */
164 /* Inside ld.so we use the local alias to avoid runtime GOT
166 # define __GLRO(rOUT, rGOT, member, offset) \
167 lwz rOUT,_rtld_local_ro@got(rGOT); \
168 lwz rOUT,offset(rOUT)
170 # define __GLRO(rOUT, rGOT, member, offset) \
171 lwz rOUT,_rtld_global_ro@got(rGOT); \
172 lwz rOUT,offset(rOUT)
175 # define __GLRO(rOUT, rGOT, member, offset) \
176 lwz rOUT,member@got(rGOT); \
180 /* Position-dependent code does not require access to the GOT. */
181 # define __GLRO(rOUT, rGOT, member, offset) \
182 lis rOUT,(member+LOWORD)@ha \
183 lwz rOUT,(member+LOWORD)@l(rOUT)
186 #endif /* __ASSEMBLER__ */