diff options
| -rw-r--r-- | qemu-common.h | 16 | ||||
| -rw-r--r-- | target-arm/exec.h | 6 | ||||
| -rw-r--r-- | target-i386/exec.h | 6 | ||||
| -rw-r--r-- | target-mips/exec.h | 2 | ||||
| -rw-r--r-- | tcg/tcg.c | 9 |
5 files changed, 28 insertions, 11 deletions
diff --git a/qemu-common.h b/qemu-common.h index 79ac779..097e1fc 100644 --- a/qemu-common.h +++ b/qemu-common.h @@ -408,4 +408,20 @@ typedef enum DisplayType #define CLAMP_MAC_TIMEOUT(to) ((void)0) #endif // _DARWIN_C_SOURCE +#if defined(__clang__) || defined(__llvm__) +/* Clang and llvm-gcc don't support global register variable (GRV). + Clang issues compile-time error for GRV. llvm-gcc accepts GRV (because + its front-end is gcc) but ignores it in the llvm-based back-end. + Undefining GRV decl to allow external/qemu and the rest of Android + to compile. But emulator built w/o GRV support will not function + correctly. User will be greeted with an error message (issued + in tcg/tcg.c) when emulator built this way is launched. + */ +#define SUPPORT_GLOBAL_REGISTER_VARIABLE 0 +#define GLOBAL_REGISTER_VARIABLE_DECL +#else +#define SUPPORT_GLOBAL_REGISTER_VARIABLE 1 +#define GLOBAL_REGISTER_VARIABLE_DECL register +#endif /* __clang__ || __llvm__ */ + #endif diff --git a/target-arm/exec.h b/target-arm/exec.h index 83571e6..43bfaa9 100644 --- a/target-arm/exec.h +++ b/target-arm/exec.h @@ -19,11 +19,7 @@ #include "config.h" #include "dyngen-exec.h" -/* Xcode 4.3 doesn't support global register variables */ -#if !defined(__APPLE_CC__) || __APPLE_CC__ < 5621 - register -#endif -struct CPUARMState *env asm(AREG0); +GLOBAL_REGISTER_VARIABLE_DECL struct CPUARMState *env asm(AREG0); #include "cpu.h" #include "exec-all.h" diff --git a/target-i386/exec.h b/target-i386/exec.h index d194f89..5d04b7f 100644 --- a/target-i386/exec.h +++ b/target-i386/exec.h @@ -29,11 +29,7 @@ #include "cpu-defs.h" -/* Xcode 4.3 doesn't support global register variables */ -#if !defined(__APPLE_CC__) || __APPLE_CC__ < 5621 - register -#endif -struct CPUX86State *env asm(AREG0); +GLOBAL_REGISTER_VARIABLE_DECL struct CPUX86State *env asm(AREG0); #include "qemu-common.h" #include "qemu-log.h" diff --git a/target-mips/exec.h b/target-mips/exec.h index 0720366..0d55790 100644 --- a/target-mips/exec.h +++ b/target-mips/exec.h @@ -8,7 +8,7 @@ #include "dyngen-exec.h" #include "cpu-defs.h" -register struct CPUMIPSState *env asm(AREG0); +GLOBAL_REGISTER_VARIABLE_DECL struct CPUMIPSState *env asm(AREG0); #include "cpu.h" #include "exec-all.h" @@ -2030,6 +2030,15 @@ static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, unsigned int tpc2gpc_index = 0; #endif // CONFIG_MEMCHECK +#if !SUPPORT_GLOBAL_REGISTER_VARIABLE + printf("ERROR: This emulator is built by compiler without global register variable\n" + "support! Emulator reserves a register to point to target architecture state\n" + "for better code generation. LLVM-based compilers such as clang and llvm-gcc\n" + "currently don't support global register variable. Please see\n" + "http://source.android.com/source/initializing.html for detail.\n\n"); + tcg_abort(); +#endif + #ifdef DEBUG_DISAS if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) { qemu_log("OP:\n"); |