diff options
Diffstat (limited to 'lib/libcompiler_rt/clear_cache.c')
| -rw-r--r-- | lib/libcompiler_rt/clear_cache.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/lib/libcompiler_rt/clear_cache.c b/lib/libcompiler_rt/clear_cache.c deleted file mode 100644 index e6bd170df38..00000000000 --- a/lib/libcompiler_rt/clear_cache.c +++ /dev/null @@ -1,199 +0,0 @@ -/* ===-- clear_cache.c - Implement __clear_cache ---------------------------=== - * - * The LLVM Compiler Infrastructure - * - * This file is dual licensed under the MIT and the University of Illinois Open - * Source Licenses. See LICENSE.TXT for details. - * - * ===----------------------------------------------------------------------=== - */ - -#include "int_lib.h" -#include <assert.h> -#include <stddef.h> - -#if __APPLE__ - #include <libkern/OSCacheControl.h> -#endif - -#if defined(_WIN32) -/* Forward declare Win32 APIs since the GCC mode driver does not handle the - newer SDKs as well as needed. */ -uint32_t FlushInstructionCache(uintptr_t hProcess, void *lpBaseAddress, - uintptr_t dwSize); -uintptr_t GetCurrentProcess(void); -#endif - -#if defined(__FreeBSD__) && defined(__arm__) - #include <sys/types.h> - #include <machine/sysarch.h> -#endif - -#if defined(__NetBSD__) && defined(__arm__) - #include <machine/sysarch.h> -#endif - -#if defined(__OpenBSD__) && (defined(__arm__) || defined(__mips__)) - #include <sys/types.h> - #include <machine/sysarch.h> -#endif - -#if defined(__linux__) && defined(__mips__) - #include <sys/cachectl.h> - #include <sys/syscall.h> - #include <unistd.h> - #if defined(__ANDROID__) && defined(__LP64__) - /* - * clear_mips_cache - Invalidates instruction cache for Mips. - */ - static void clear_mips_cache(const void* Addr, size_t Size) { - __asm__ volatile ( - ".set push\n" - ".set noreorder\n" - ".set noat\n" - "beq %[Size], $zero, 20f\n" /* If size == 0, branch around. */ - "nop\n" - "daddu %[Size], %[Addr], %[Size]\n" /* Calculate end address + 1 */ - "rdhwr $v0, $1\n" /* Get step size for SYNCI. - $1 is $HW_SYNCI_Step */ - "beq $v0, $zero, 20f\n" /* If no caches require - synchronization, branch - around. */ - "nop\n" - "10:\n" - "synci 0(%[Addr])\n" /* Synchronize all caches around - address. */ - "daddu %[Addr], %[Addr], $v0\n" /* Add step size. */ - "sltu $at, %[Addr], %[Size]\n" /* Compare current with end - address. */ - "bne $at, $zero, 10b\n" /* Branch if more to do. */ - "nop\n" - "sync\n" /* Clear memory hazards. */ - "20:\n" - "bal 30f\n" - "nop\n" - "30:\n" - "daddiu $ra, $ra, 12\n" /* $ra has a value of $pc here. - Add offset of 12 to point to the - instruction after the last nop. - */ - "jr.hb $ra\n" /* Return, clearing instruction - hazards. */ - "nop\n" - ".set pop\n" - : [Addr] "+r"(Addr), [Size] "+r"(Size) - :: "at", "ra", "v0", "memory" - ); - } - #endif -#endif - -/* - * The compiler generates calls to __clear_cache() when creating - * trampoline functions on the stack for use with nested functions. - * It is expected to invalidate the instruction cache for the - * specified range. - */ - -void __clear_cache(void *start, void *end) { -#if __i386__ || __x86_64__ || defined(_M_IX86) || defined(_M_X64) -/* - * Intel processors have a unified instruction and data cache - * so there is nothing to do - */ -#elif defined(_WIN32) && (defined(__arm__) || defined(__aarch64__)) - FlushInstructionCache(GetCurrentProcess(), start, end - start); -#elif defined(__arm__) && !defined(__APPLE__) - #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) - struct arm_sync_icache_args arg; - - arg.addr = (uintptr_t)start; - arg.len = (uintptr_t)end - (uintptr_t)start; - - sysarch(ARM_SYNC_ICACHE, &arg); - #elif defined(__linux__) - /* - * We used to include asm/unistd.h for the __ARM_NR_cacheflush define, but - * it also brought many other unused defines, as well as a dependency on - * kernel headers to be installed. - * - * This value is stable at least since Linux 3.13 and should remain so for - * compatibility reasons, warranting it's re-definition here. - */ - #define __ARM_NR_cacheflush 0x0f0002 - register int start_reg __asm("r0") = (int) (intptr_t) start; - const register int end_reg __asm("r1") = (int) (intptr_t) end; - const register int flags __asm("r2") = 0; - const register int syscall_nr __asm("r7") = __ARM_NR_cacheflush; - __asm __volatile("svc 0x0" - : "=r"(start_reg) - : "r"(syscall_nr), "r"(start_reg), "r"(end_reg), - "r"(flags)); - assert(start_reg == 0 && "Cache flush syscall failed."); - #else - compilerrt_abort(); - #endif -#elif defined(__linux__) && defined(__mips__) - const uintptr_t start_int = (uintptr_t) start; - const uintptr_t end_int = (uintptr_t) end; - #if defined(__ANDROID__) && defined(__LP64__) - // Call synci implementation for short address range. - const uintptr_t address_range_limit = 256; - if ((end_int - start_int) <= address_range_limit) { - clear_mips_cache(start, (end_int - start_int)); - } else { - syscall(__NR_cacheflush, start, (end_int - start_int), BCACHE); - } - #else - syscall(__NR_cacheflush, start, (end_int - start_int), BCACHE); - #endif -#elif defined(__mips__) && defined(__OpenBSD__) - cacheflush(start, (uintptr_t)end - (uintptr_t)start, BCACHE); -#elif defined(__aarch64__) && !defined(__APPLE__) - uint64_t xstart = (uint64_t)(uintptr_t) start; - uint64_t xend = (uint64_t)(uintptr_t) end; - uint64_t addr; - - // Get Cache Type Info - uint64_t ctr_el0; - __asm __volatile("mrs %0, ctr_el0" : "=r"(ctr_el0)); - - /* - * dc & ic instructions must use 64bit registers so we don't use - * uintptr_t in case this runs in an IPL32 environment. - */ - const size_t dcache_line_size = 4 << ((ctr_el0 >> 16) & 15); - for (addr = xstart & ~(dcache_line_size - 1); addr < xend; - addr += dcache_line_size) - __asm __volatile("dc cvau, %0" :: "r"(addr)); - __asm __volatile("dsb ish"); - - const size_t icache_line_size = 4 << ((ctr_el0 >> 0) & 15); - for (addr = xstart & ~(icache_line_size - 1); addr < xend; - addr += icache_line_size) - __asm __volatile("ic ivau, %0" :: "r"(addr)); - __asm __volatile("isb sy"); -#elif defined (__powerpc64__) - const size_t line_size = 32; - const size_t len = (uintptr_t)end - (uintptr_t)start; - - const uintptr_t mask = ~(line_size - 1); - const uintptr_t start_line = ((uintptr_t)start) & mask; - const uintptr_t end_line = ((uintptr_t)start + len + line_size - 1) & mask; - - for (uintptr_t line = start_line; line < end_line; line += line_size) - __asm__ volatile("dcbf 0, %0" : : "r"(line)); - __asm__ volatile("sync"); - - for (uintptr_t line = start_line; line < end_line; line += line_size) - __asm__ volatile("icbi 0, %0" : : "r"(line)); - __asm__ volatile("isync"); -#else - #if __APPLE__ - /* On Darwin, sys_icache_invalidate() provides this functionality */ - sys_icache_invalidate(start, end-start); - #else - compilerrt_abort(); - #endif -#endif -} |