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execve: Clear sigaltstack and fp_regs

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Fujitsu: POSTK_DEBUG_TEMP_FIX_19
Refs: #976
Change-Id: I16895eab13eecbb47b7e6da961fae82ee5e570ee
This commit is contained in:
Ken Sato
2018-07-17 15:37:57 +09:00
parent d898f18293
commit c716e87c53
14 changed files with 498 additions and 28 deletions
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6
kernel/include/process.h
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@@ -829,4 +829,10 @@ void proc_init(void);
void set_timer(void);
struct sig_pending *hassigpending(struct thread *thread);
void release_fp_regs(struct thread *proc);
void save_fp_regs(struct thread *proc);
void copy_fp_regs(struct thread *from, struct thread *to);
void restore_fp_regs(struct thread *proc);
void clear_fp_regs(void);
#endif

7
kernel/process.c
View File

@@ -77,10 +77,6 @@ static int vm_range_insert(struct process_vm *vm,
static struct vm_range *vm_range_find(struct process_vm *vm,
unsigned long addr);
static int copy_user_ranges(struct process_vm *vm, struct process_vm *orgvm);
extern void release_fp_regs(struct thread *proc);
extern void save_fp_regs(struct thread *proc);
extern void copy_fp_regs(struct thread *from, struct thread *to);
extern void restore_fp_regs(struct thread *proc);
extern void __runq_add_proc(struct thread *proc, int cpu_id);
extern void terminate_host(int pid);
extern void lapic_timer_enable(unsigned int clocks);
@@ -2947,6 +2943,9 @@ void sched_init(void)
INIT_LIST_HEAD(&cpu_local_var(migq));
ihk_mc_spinlock_init(&cpu_local_var(migq_lock));
// to save default fpregs
save_fp_regs(idle_thread);
#ifdef TIMER_CPU_ID
if (ihk_mc_get_processor_id() == TIMER_CPU_ID) {
init_timers();

15
kernel/syscall.c
View File

@@ -2129,10 +2129,6 @@ static void munmap_all(void)
return;
} /* munmap_all() */
#ifdef POSTK_DEBUG_TEMP_FIX_19
extern void clear_fp_regs(struct thread *thread);
#endif /* POSTK_DEBUG_TEMP_FIX_19 */
SYSCALL_DECLARE(execve)
{
int error;
@@ -2273,10 +2269,13 @@ SYSCALL_DECLARE(execve)
thread->sigcommon->action[i].sa.sa_handler = SIG_DFL;
}
#ifdef POSTK_DEBUG_TEMP_FIX_19
/* The floating-point environment is reset to the default. */
clear_fp_regs(thread);
#endif /* POSTK_DEBUG_TEMP_FIX_19 */
/* Reset floating-point environment to default. */
clear_fp_regs();
/* Reset sigaltstack to default */
thread->sigstack.ss_sp = NULL;
thread->sigstack.ss_flags = SS_DISABLE;
thread->sigstack.ss_size = 0;
error = ptrace_report_exec(thread);
if(error) {