maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Implement Android versions of __clear_cache for arm32 & mips. 

The MIPS version was reviewed by myself. The ARM version was reviewed by JF
Bastien.

Patch by Narayan Kamath <narayan@google.com>.

llvm-svn: 203674
This commit is contained in:
Daniel Sanders 2014-03-12 16:38:27 +00:00
parent b5cfa8c2f3
commit f90e78a48d
1 changed files with 31 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
compiler-rt/lib/builtins/clear_cache.c
View File

@ -17,6 +17,14 @@
#include <machine/sysarch.h>
#endif
#if defined(ANDROID) && defined(__mips__)
#include <sys/cachectl.h>
#endif
#if defined(ANDROID) && defined(__arm__)
#include <asm/unistd.h>
#endif
/*
* The compiler generates calls to __clear_cache() when creating
* trampoline functions on the stack for use with nested functions.
@ -32,13 +40,31 @@ __clear_cache(void* start, void* end)
* Intel processors have a unified instruction and data cache
* so there is nothing to do
*/
#elif defined(__NetBSD__) && defined(__arm__)
struct arm_sync_icache_args arg;
#elif defined(__arm__) && !defined(__APPLE__)
#if defined(__NetBSD__)
struct arm_sync_icache_args arg;
arg.addr = (uintptr_t)start;
arg.len = (uintptr_t)end - (uintptr_t)start;
arg.addr = (uintptr_t)start;
arg.len = (uintptr_t)end - (uintptr_t)start;
sysarch(ARM_SYNC_ICACHE, &arg);
sysarch(ARM_SYNC_ICACHE, &arg);
#elif defined(ANDROID)
const 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) : "r0");
if (start_reg != 0) {
compilerrt_abort();
}
#else
compilerrt_abort();
#endif
#elif defined(ANDROID) && defined(__mips__)
const uintptr_t start_int = (uintptr_t) start;
const uintptr_t end_int = (uintptr_t) end;
_flush_cache(start, (end_int - start_int), BCACHE);
#elif defined(__aarch64__) && !defined(__APPLE__)
uint64_t xstart = (uint64_t)(uintptr_t) start;
uint64_t xend = (uint64_t)(uintptr_t) end;