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Fix the page boundary crossing bug.

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Signed-off-by: Jason Evans <jasone@canonware.com>
This commit is contained in:
Arun Sharma 2010-06-08 14:44:07 -07:00
parent b3757e7792
commit 99e60be5a4
2 changed files with 18 additions and 6 deletions
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12
src/x86/Ginit.c
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@ -88,8 +88,14 @@ validate_mem (unw_word_t addr)
{
int i, victim;
#ifdef HAVE_MINCORE
char mvec[2]; /* Unaligned access may cross page boundary */
unsigned char mvec[2]; /* Unaligned access may cross page boundary */
#endif
size_t len;
if (PAGE_START(addr + sizeof (unw_word_t) - 1) == PAGE_START(addr))
len = PAGE_SIZE;
else
len = PAGE_SIZE * 2;
addr = PAGE_START(addr);
@ -103,9 +109,9 @@ validate_mem (unw_word_t addr)
}
#ifdef HAVE_MINCORE
if (mincore ((void *) addr, sizeof (unw_word_t), mvec) == -1)
if (mincore ((void *) addr, len, mvec) == -1)
#else
if (msync ((void *) addr, sizeof (unw_word_t), MS_ASYNC) == -1)
if (msync ((void *) addr, len, MS_ASYNC) == -1)
#endif
return -1;

12
src/x86_64/Ginit.c
View file

@ -91,8 +91,14 @@ validate_mem (unw_word_t addr)
{
int i, victim;
#ifdef HAVE_MINCORE
char mvec[2]; /* Unaligned access may cross page boundary */
unsigned char mvec[2]; /* Unaligned access may cross page boundary */
#endif
size_t len;
if (PAGE_START(addr + sizeof (unw_word_t) - 1) == PAGE_START(addr))
len = PAGE_SIZE;
else
len = PAGE_SIZE * 2;
addr = PAGE_START(addr);
@ -106,9 +112,9 @@ validate_mem (unw_word_t addr)
}
#ifdef HAVE_MINCORE
if (mincore ((void *) addr, sizeof (unw_word_t), mvec) == -1)
if (mincore ((void *) addr, len, mvec) == -1)
#else
if (msync ((void *) addr, sizeof (unw_word_t), MS_ASYNC) == -1)
if (msync ((void *) addr, len, MS_ASYNC) == -1)
#endif
return -1;