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am 269851bf: Merge "Declare __page_shift and __page_size with C linkage."

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* commit '269851bf950049f16eeb2a402f700952480bcecf':
  Declare __page_shift and __page_size with C linkage.
This commit is contained in:
Elliott Hughes 2013-09-19 12:05:08 -07:00 committed by Android Git Automerger
commit 94c325fb3b
3 changed files with 13 additions and 12 deletions
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4
libc/bionic/libc_init_common.cpp
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@ -60,10 +60,6 @@ char** environ;
// Declared in <private/bionic_ssp.h>. // Declared in <private/bionic_ssp.h>.
uintptr_t __stack_chk_guard = 0; uintptr_t __stack_chk_guard = 0;
// Declared in <asm/page.h>.
unsigned int __page_size = PAGE_SIZE;
unsigned int __page_shift = PAGE_SHIFT;
static size_t get_main_thread_stack_size() { static size_t get_main_thread_stack_size() {
rlimit stack_limit; rlimit stack_limit;
int rlimit_result = getrlimit(RLIMIT_STACK, &stack_limit); int rlimit_result = getrlimit(RLIMIT_STACK, &stack_limit);

12
libc/bionic/stubs.cpp
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@ -469,3 +469,15 @@ void setusershell() {
void endusershell() { void endusershell() {
UNIMPLEMENTED; UNIMPLEMENTED;
} }
// Portable code should use sysconf(_SC_PAGESIZE) directly instead.
int getpagesize() {
return sysconf(_SC_PAGESIZE);
}
// These were accidentally declared in <unistd.h> because we stupidly used to inline
// getpagesize() and __getpageshift(). Needed for backwards compatibility with old NDK apps.
extern "C" {
unsigned int __page_size = PAGE_SIZE;
unsigned int __page_shift = PAGE_SHIFT;
}

9
libc/include/unistd.h
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@ -170,14 +170,7 @@ extern int ttyname_r(int, char*, size_t);
extern int acct(const char* filepath); extern int acct(const char* filepath);
static __inline__ int getpagesize(void) { int getpagesize(void);
extern unsigned int __page_size;
return __page_size;
}
static __inline__ int __getpageshift(void) {
extern unsigned int __page_shift;
return __page_shift;
}
extern int sysconf(int name); extern int sysconf(int name);