1 /* SPDX-License-Identifier: GPL-2.0 */
33 #define SYSCALL_ALIAS(alias, name) asm(			\  argument
36 		  __stringify(name))
54  * The argument stack may be owned by the assembly-language
64 /* Assembly files may be compiled with -traditional .. */
78 /* SYM_T_FUNC -- type used by assembler to mark functions */
83 /* SYM_T_OBJECT -- type used by assembler to mark data */
88 /* SYM_T_NONE -- type used by assembler to mark entries of unknown type */
93 /* SYM_A_* -- align the symbol? */
97 /* SYM_L_* -- linkage of symbols */
98 #define SYM_L_GLOBAL(name)			.globl name  argument
99 #define SYM_L_WEAK(name)			.weak name  argument
100 #define SYM_L_LOCAL(name)			/* nothing */  argument
111 #define GLOBAL(name) \  argument
112 	.globl name ASM_NL \
113 	name:
118 #define ENTRY(name) \  argument
119 	SYM_FUNC_START(name)
127 #define WEAK(name)	   \  argument
128 	SYM_FUNC_START_WEAK(name)
133 #define END(name) \  argument
134 	.size name, .-name
137 /* If symbol 'name' is treated as a subroutine (gets called, and returns)
138  * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
143 #define ENDPROC(name) \  argument
144 	SYM_FUNC_END(name)
150 /* SYM_ENTRY -- use only if you have to for non-paired symbols */
152 #define SYM_ENTRY(name, linkage, align...)		\  argument
153 	linkage(name) ASM_NL				\
155 	name:
158 /* SYM_START -- use only if you have to */
160 #define SYM_START(name, linkage, align...)		\  argument
161 	SYM_ENTRY(name, linkage, align)
164 /* SYM_END -- use only if you have to */
166 #define SYM_END(name, sym_type)				\  argument
167 	.type name sym_type ASM_NL			\
168 	.set .L__sym_size_##name, .-name ASM_NL		\
169 	.size name, .L__sym_size_##name
172 /* SYM_ALIAS -- use only if you have to */
174 #define SYM_ALIAS(alias, name, linkage)			\  argument
176 	.set alias, name ASM_NL
182  * FUNC -- C-like functions (proper stack frame etc.)
183  * CODE -- non-C code (e.g. irq handlers with different, special stack etc.)
194  * ALIAS -- does not generate debug info -- the aliased function will
197 /* SYM_INNER_LABEL_ALIGN -- only for labels in the middle of code */
199 #define SYM_INNER_LABEL_ALIGN(name, linkage)	\  argument
200 	.type name SYM_T_NONE ASM_NL			\
201 	SYM_ENTRY(name, linkage, SYM_A_ALIGN)
204 /* SYM_INNER_LABEL -- only for labels in the middle of code */
206 #define SYM_INNER_LABEL(name, linkage)		\  argument
207 	.type name SYM_T_NONE ASM_NL			\
208 	SYM_ENTRY(name, linkage, SYM_A_NONE)
211 /* SYM_FUNC_START -- use for global functions */
213 #define SYM_FUNC_START(name)				\  argument
214 	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
217 /* SYM_FUNC_START_NOALIGN -- use for global functions, w/o alignment */
219 #define SYM_FUNC_START_NOALIGN(name)			\  argument
220 	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
223 /* SYM_FUNC_START_LOCAL -- use for local functions */
225 #define SYM_FUNC_START_LOCAL(name)			\  argument
226 	SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
229 /* SYM_FUNC_START_LOCAL_NOALIGN -- use for local functions, w/o alignment */
231 #define SYM_FUNC_START_LOCAL_NOALIGN(name)		\  argument
232 	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
235 /* SYM_FUNC_START_WEAK -- use for weak functions */
237 #define SYM_FUNC_START_WEAK(name)			\  argument
238 	SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN)
241 /* SYM_FUNC_START_WEAK_NOALIGN -- use for weak functions, w/o alignment */
243 #define SYM_FUNC_START_WEAK_NOALIGN(name)		\  argument
244 	SYM_START(name, SYM_L_WEAK, SYM_A_NONE)
248  * SYM_FUNC_END -- the end of SYM_FUNC_START_LOCAL, SYM_FUNC_START,
252 #define SYM_FUNC_END(name)				\  argument
253 	SYM_END(name, SYM_T_FUNC)
257  * SYM_FUNC_ALIAS -- define a global alias for an existing function
260 #define SYM_FUNC_ALIAS(alias, name)					\  argument
261 	SYM_ALIAS(alias, name, SYM_L_GLOBAL)
265  * SYM_FUNC_ALIAS_LOCAL -- define a local alias for an existing function
268 #define SYM_FUNC_ALIAS_LOCAL(alias, name)				\  argument
269 	SYM_ALIAS(alias, name, SYM_L_LOCAL)
273  * SYM_FUNC_ALIAS_WEAK -- define a weak global alias for an existing function
276 #define SYM_FUNC_ALIAS_WEAK(alias, name)				\  argument
277 	SYM_ALIAS(alias, name, SYM_L_WEAK)
280 /* SYM_CODE_START -- use for non-C (special) functions */
282 #define SYM_CODE_START(name)				\  argument
283 	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
286 /* SYM_CODE_START_NOALIGN -- use for non-C (special) functions, w/o alignment */
288 #define SYM_CODE_START_NOALIGN(name)			\  argument
289 	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
292 /* SYM_CODE_START_LOCAL -- use for local non-C (special) functions */
294 #define SYM_CODE_START_LOCAL(name)			\  argument
295 	SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
299  * SYM_CODE_START_LOCAL_NOALIGN -- use for local non-C (special) functions,
303 #define SYM_CODE_START_LOCAL_NOALIGN(name)		\  argument
304 	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
307 /* SYM_CODE_END -- the end of SYM_CODE_START_LOCAL, SYM_CODE_START, ... */
309 #define SYM_CODE_END(name)				\  argument
310 	SYM_END(name, SYM_T_NONE)
315 /* SYM_DATA_START -- global data symbol */
317 #define SYM_DATA_START(name)				\  argument
318 	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
321 /* SYM_DATA_START -- local data symbol */
323 #define SYM_DATA_START_LOCAL(name)			\  argument
324 	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
327 /* SYM_DATA_END -- the end of SYM_DATA_START symbol */
329 #define SYM_DATA_END(name)				\  argument
330 	SYM_END(name, SYM_T_OBJECT)
333 /* SYM_DATA_END_LABEL -- the labeled end of SYM_DATA_START symbol */
335 #define SYM_DATA_END_LABEL(name, linkage, label)	\  argument
339 	SYM_END(name, SYM_T_OBJECT)
342 /* SYM_DATA -- start+end wrapper around simple global data */
344 #define SYM_DATA(name, data...)				\  argument
345 	SYM_DATA_START(name) ASM_NL				\
347 	SYM_DATA_END(name)
350 /* SYM_DATA_LOCAL -- start+end wrapper around simple local data */
352 #define SYM_DATA_LOCAL(name, data...)			\  argument
353 	SYM_DATA_START_LOCAL(name) ASM_NL			\
355 	SYM_DATA_END(name)