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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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5
arch/arm64/kernel/cpu.c
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@@ -1437,8 +1437,7 @@ void copy_fp_regs(struct thread *from, struct thread *to)
}
}
void
clear_fp_regs(struct thread *thread)
void clear_fp_regs(void)
{
if (likely(elf_hwcap & (HWCAP_FP | HWCAP_ASIMD))) {
#ifdef CONFIG_ARM64_SVE
@@ -1475,7 +1474,7 @@ restore_fp_regs(struct thread *thread)
if (likely(elf_hwcap & (HWCAP_FP | HWCAP_ASIMD))) {
if (!thread->fp_regs) {
// only clear fpregs.
clear_fp_regs(thread);
clear_fp_regs();
return;
}
thread_fpsimd_load(thread);

6
arch/arm64/kernel/fpsimd.c
View File

@@ -10,6 +10,7 @@
#include <cpufeature.h>
#include <kmalloc.h>
#include <debug.h>
#include <process.h>
//#define DEBUG_PRINT_FPSIMD
@@ -71,9 +72,6 @@ static int get_nr_threads(struct process *proc)
return nr_threads;
}
extern void save_fp_regs(struct thread *thread);
extern void clear_fp_regs(struct thread *thread);
extern void restore_fp_regs(struct thread *thread);
/* @ref.impl arch/arm64/kernel/fpsimd.c::sve_set_vector_length */
int sve_set_vector_length(struct thread *thread,
unsigned long vl, unsigned long flags)
@@ -127,7 +125,7 @@ int sve_set_vector_length(struct thread *thread,
/* for self at prctl syscall */
if (thread == cpu_local_var(current)) {
save_fp_regs(thread);
clear_fp_regs(thread);
clear_fp_regs();
thread_sve_to_fpsimd(thread, &fp_regs);
sve_free(thread);