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change sys_brk to SYSCALL_DECLARE(brk)

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NAKAMURA Gou
2013-06-12 16:49:14 +09:00
parent 5fc0d90b7d
commit 93f15321a5
1 changed files with 35 additions and 36 deletions
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71
kernel/syscall.c
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@@ -102,42 +102,6 @@ int do_syscall(struct syscall_request *req, ihk_mc_user_context_t *ctx)
return res->ret;
}
long sys_brk(int n, ihk_mc_user_context_t *ctx)
{
unsigned long address = ihk_mc_syscall_arg0(ctx);
struct vm_regions *region = &cpu_local_var(current)->vm->region;
unsigned long r;
dkprintf("SC(%d)[sys_brk] brk_start=%lx,end=%lx\n", ihk_mc_get_processor_id(), region->brk_start, region->brk_end);
/* brk change fail, including glibc trick brk(0) to obtain current brk */
if(address < region->brk_start) {
r = region->brk_end;
goto out;
}
/* brk change fail, because we don't shrink memory region */
if(address < region->brk_end) {
r = region->brk_end;
goto out;
}
/* try to extend memory region */
ihk_mc_spinlock_lock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
region->brk_end =
extend_process_region(cpu_local_var(current),
region->brk_start, region->brk_end,
address, 0);
ihk_mc_spinlock_unlock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
dkprintf("SC(%d)[sys_brk] brk_end set to %lx\n", ihk_mc_get_processor_id(), region->brk_end);
r = region->brk_end;
out:
return r;
}
#define SYSCALL_DECLARE(name) long sys_##name(int n, ihk_mc_user_context_t *ctx)
#define SYSCALL_HEADER struct syscall_request request IHK_DMA_ALIGN; \
request.number = n
@@ -524,6 +488,41 @@ SYSCALL_DECLARE(mprotect)
return 0;
}
SYSCALL_DECLARE(brk)
{
unsigned long address = ihk_mc_syscall_arg0(ctx);
struct vm_regions *region = &cpu_local_var(current)->vm->region;
unsigned long r;
dkprintf("SC(%d)[sys_brk] brk_start=%lx,end=%lx\n", ihk_mc_get_processor_id(), region->brk_start, region->brk_end);
/* brk change fail, including glibc trick brk(0) to obtain current brk */
if(address < region->brk_start) {
r = region->brk_end;
goto out;
}
/* brk change fail, because we don't shrink memory region */
if(address < region->brk_end) {
r = region->brk_end;
goto out;
}
/* try to extend memory region */
ihk_mc_spinlock_lock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
region->brk_end =
extend_process_region(cpu_local_var(current),
region->brk_start, region->brk_end,
address, 0);
ihk_mc_spinlock_unlock_noirq(&cpu_local_var(current)->vm->memory_range_lock);
dkprintf("SC(%d)[sys_brk] brk_end set to %lx\n", ihk_mc_get_processor_id(), region->brk_end);
r = region->brk_end;
out:
return r;
}
SYSCALL_DECLARE(getpid)
{