gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

align 1MB when performing mmap with MAP_FIXED == 0 and MAP_ANONYMOUS == 0 and MAP_PRIVATE == 1 to make it easy to match assembly code in memory and one in file

Browse Source
This commit is contained in:
Masamichi Takagi m-takagi@ab.jp.nec.com
2012-11-27 15:37:57 +09:00
parent eaae0b4740
commit d4b186f1d8
1 changed files with 13 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
kernel/syscall.c
View File

@ -474,14 +474,26 @@ SYSCALL_DECLARE(mmap)
// #define MAP_PRIVATE 0x02
unsigned long flags = aal_mc_spinlock_lock(&cpu_local_var(current)->vm->memory_range_lock);
#if 1 /* takagidebug*/
unsigned long amt_align = 0x100000; /* takagi */
unsigned long s = ((region->map_end + amt_align - 1) & ~(amt_align - 1));
unsigned long len = (aal_mc_syscall_arg1(ctx) + PAGE_SIZE - 1) & PAGE_MASK;
dkprintf("(%d),syscall.c,!MAP_FIXED,!MAP_ANONYMOUS,amt_align=%lx,s=%lx,len=%lx\n", aal_mc_get_processor_id(), amt_align, s, len);
region->map_end =
extend_process_region(cpu_local_var(current),
region->map_start,
s,
s + len);
#else
unsigned long s = (region->map_end + PAGE_SIZE - 1) & PAGE_MASK;
unsigned long len = (aal_mc_syscall_arg1(ctx) + PAGE_SIZE - 1) & PAGE_MASK;
// lockr = aal_mc_spinlock_lock(&cpu_status_lock);
region->map_end =
extend_process_region(cpu_local_var(current),
region->map_start,
region->map_end,
s + len);
#endif
aal_mc_spinlock_unlock(&cpu_local_var(current)->vm->memory_range_lock, flags);
if (region->map_end < s + len) { return -EINVAL; }
s = region->map_end - len;