diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/global_data.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h index 63e4ad5..c69d064 100644 --- a/arch/arm/include/asm/global_data.h +++ b/arch/arm/include/asm/global_data.h @@ -44,10 +44,35 @@ struct arch_global_data { #include <asm-generic/global_data.h> +#ifdef __clang__ + +#define DECLARE_GLOBAL_DATA_PTR +#define gd get_gd() + +static inline gd_t *get_gd(void) +{ + gd_t *gd_ptr; + +#ifdef CONFIG_ARM64 + /* + * Make will already error that reserving x18 is not supported at the + * time of writing, clang: error: unknown argument: '-ffixed-x18' + */ + __asm__ volatile("mov %0, x18\n" : "=r" (gd_ptr)); +#else + __asm__ volatile("mov %0, r9\n" : "=r" (gd_ptr)); +#endif + + return gd_ptr; +} + +#else + #ifdef CONFIG_ARM64 #define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("x18") #else #define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r9") #endif +#endif #endif /* __ASM_GBL_DATA_H */ |