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Detect and reject misaligned args for mmap. This makes

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none/tests/map_unaligned work.  The PRE handlers for sys_mmap and
sys_old_mmap are more convoluted than I would like, and might benefit
from a rewrite.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3284
This commit is contained in:
Julian Seward 2005-03-11 14:12:38 +00:00
parent 46bc07d683
commit 6ddcb7dc7d
1 changed files with 12 additions and 0 deletions
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12
coregrind/vg_syscalls.c
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@ -4054,6 +4054,12 @@ PRE(old_mmap, Special)
return;
}
if (/*(a4 & VKI_MAP_FIXED) &&*/ (0 != (a1 & (VKI_PAGE_SIZE-1)))) {
/* zap any misaligned addresses. */
SET_RESULT( -VKI_EINVAL );
return;
}
if (a4 & VKI_MAP_FIXED) {
if (!VG_(valid_client_addr)(a1, a2, tid, "old_mmap")) {
PRINT("old_mmap failing: %p-%p\n", a1, a1+a2);
@ -4098,6 +4104,12 @@ PRE(sys_mmap2, 0)
return;
}
if (/*(ARG4 & VKI_MAP_FIXED) && */ (0 != (ARG1 & (VKI_PAGE_SIZE-1)))) {
/* zap any misaligned addresses. */
SET_RESULT( -VKI_EINVAL );
return;
}
if (ARG4 & VKI_MAP_FIXED) {
if (!VG_(valid_client_addr)(ARG1, ARG2, tid, "mmap2"))
SET_RESULT( -VKI_ENOMEM );