1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_STATIC_CALL_H
3 #define _ASM_POWERPC_STATIC_CALL_H
4
5 #define __PPC_SCT(name, inst) \
6 asm(".pushsection .text, \"ax\" \n" \
7 ".align 5 \n" \
8 ".globl " STATIC_CALL_TRAMP_STR(name) " \n" \
9 STATIC_CALL_TRAMP_STR(name) ": \n" \
10 inst " \n" \
11 " lis 12,2f@ha \n" \
12 " lwz 12,2f@l(12) \n" \
13 " mtctr 12 \n" \
14 " bctr \n" \
15 "1: li 3, 0 \n" \
16 " blr \n" \
17 "2: .long 0 \n" \
18 ".type " STATIC_CALL_TRAMP_STR(name) ", @function \n" \
19 ".size " STATIC_CALL_TRAMP_STR(name) ", . - " STATIC_CALL_TRAMP_STR(name) " \n" \
20 ".popsection \n")
21
22 #define PPC_SCT_RET0 20 /* Offset of label 1 */
23 #define PPC_SCT_DATA 28 /* Offset of label 2 */
24
25 #define ARCH_DEFINE_STATIC_CALL_TRAMP(name, func) __PPC_SCT(name, "b " #func)
26 #define ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name) __PPC_SCT(name, "blr")
27 #define ARCH_DEFINE_STATIC_CALL_RET0_TRAMP(name) __PPC_SCT(name, "b .+20")
28
29 #endif /* _ASM_POWERPC_STATIC_CALL_H */
30
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