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#ifndef __ASM_LINKAGE_H #define __ASM_LINKAGE_H #define __ALIGN .align 2 #define __ALIGN_STR ".align 2" #if defined(CONFIG_ARM64_BTI_KERNEL) && defined(__aarch64__) /* * Since current versions of gas reject the BTI instruction unless we * set the architecture version to v8.5 we use the hint instruction * instead. */ #define BTI_C hint 34 ; /* * When using in-kernel BTI we need to ensure that PCS-conformant assembly * functions have suitable annotations. Override SYM_FUNC_START to insert * a BTI landing pad at the start of everything. */ #define SYM_FUNC_START(name) \ SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) \ BTI_C #define SYM_FUNC_START_NOALIGN(name) \ SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE) \ BTI_C #define SYM_FUNC_START_LOCAL(name) \ SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN) \ BTI_C #define SYM_FUNC_START_LOCAL_NOALIGN(name) \ SYM_START(name, SYM_L_LOCAL, SYM_A_NONE) \ BTI_C #define SYM_FUNC_START_WEAK(name) \ SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN) \ BTI_C #define SYM_FUNC_START_WEAK_NOALIGN(name) \ SYM_START(name, SYM_L_WEAK, SYM_A_NONE) \ BTI_C #endif /* * Annotate a function as position independent, i.e., safe to be called before * the kernel virtual mapping is activated. */ #define SYM_FUNC_START_PI(x) \ SYM_FUNC_START_ALIAS(__pi_##x); \ SYM_FUNC_START(x) #define SYM_FUNC_START_WEAK_PI(x) \ SYM_FUNC_START_ALIAS(__pi_##x); \ SYM_FUNC_START_WEAK(x) #define SYM_FUNC_START_WEAK_ALIAS_PI(x) \ SYM_FUNC_START_ALIAS(__pi_##x); \ SYM_START(x, SYM_L_WEAK, SYM_A_ALIGN) #define SYM_FUNC_END_PI(x) \ SYM_FUNC_END(x); \ SYM_FUNC_END_ALIAS(__pi_##x) #define SYM_FUNC_END_ALIAS_PI(x) \ SYM_FUNC_END_ALIAS(x); \ SYM_FUNC_END_ALIAS(__pi_##x) #endif