diff options
Diffstat (limited to 'arch/powerpc/include/asm/static_call.h')
| -rw-r--r-- | arch/powerpc/include/asm/static_call.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/static_call.h b/arch/powerpc/include/asm/static_call.h new file mode 100644 index 000000000000..de1018cc522b --- /dev/null +++ b/arch/powerpc/include/asm/static_call.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_STATIC_CALL_H +#define _ASM_POWERPC_STATIC_CALL_H + +#define __PPC_SCT(name, inst) \ + asm(".pushsection .text, \"ax\" \n" \ + ".align 5 \n" \ + ".globl " STATIC_CALL_TRAMP_STR(name) " \n" \ + STATIC_CALL_TRAMP_STR(name) ": \n" \ + inst " \n" \ + " lis 12,2f@ha \n" \ + " lwz 12,2f@l(12) \n" \ + " mtctr 12 \n" \ + " bctr \n" \ + "1: li 3, 0 \n" \ + " blr \n" \ + "2: .long 0 \n" \ + ".type " STATIC_CALL_TRAMP_STR(name) ", @function \n" \ + ".size " STATIC_CALL_TRAMP_STR(name) ", . - " STATIC_CALL_TRAMP_STR(name) " \n" \ + ".popsection \n") + +#define PPC_SCT_RET0 20 /* Offset of label 1 */ +#define PPC_SCT_DATA 28 /* Offset of label 2 */ + +#define ARCH_DEFINE_STATIC_CALL_TRAMP(name, func) __PPC_SCT(name, "b " #func) +#define ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name) __PPC_SCT(name, "blr") +#define ARCH_DEFINE_STATIC_CALL_RET0_TRAMP(name) __PPC_SCT(name, "b .+20") + +#endif /* _ASM_POWERPC_STATIC_CALL_H */ |