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authorLinus Torvalds <torvalds@linux-foundation.org>2016-05-27 18:54:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-27 18:54:59 -0700
commit7d8eb50290e4edf8de36973728862f73ff0b94bc (patch)
tree858c605f425d928b7b893b378a76b869e6f250db /arch/um
parent23a3e178b9f8be3a900c7b11d795e54b4a131af0 (diff)
parenta78ff1112263fdd871d3506dbcff44f6f12e8423 (diff)
Merge branch 'for-linus-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
Pull UML updates from Richard Weinberger: "This contains a nice FPU fixup from Eli Cooper for UML" * 'for-linus-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: add extended processor state save/restore support um: extend fpstate to _xstate to support YMM registers um: fix FPU state preservation around signal handlers
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/include/shared/registers.h2
-rw-r--r--arch/um/kernel/process.c2
-rw-r--r--arch/um/os-Linux/signal.c28
3 files changed, 23 insertions, 9 deletions
diff --git a/arch/um/include/shared/registers.h b/arch/um/include/shared/registers.h
index f5b76355ad71..a74449b5b0e3 100644
--- a/arch/um/include/shared/registers.h
+++ b/arch/um/include/shared/registers.h
@@ -9,6 +9,8 @@
#include <sysdep/ptrace.h>
#include <sysdep/archsetjmp.h>
+extern int save_i387_registers(int pid, unsigned long *fp_regs);
+extern int restore_i387_registers(int pid, unsigned long *fp_regs);
extern int save_fp_registers(int pid, unsigned long *fp_regs);
extern int restore_fp_registers(int pid, unsigned long *fp_regs);
extern int save_fpx_registers(int pid, unsigned long *fp_regs);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 0b04711f1f18..034b42c7ab40 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -398,6 +398,6 @@ int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
{
int cpu = current_thread_info()->cpu;
- return save_fp_registers(userspace_pid[cpu], (unsigned long *) fpu);
+ return save_i387_registers(userspace_pid[cpu], (unsigned long *) fpu);
}
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 7801666514ed..8acaf4e384c0 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -29,23 +29,29 @@ void (*sig_info[NSIG])(int, struct siginfo *, struct uml_pt_regs *) = {
static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc)
{
- struct uml_pt_regs r;
+ struct uml_pt_regs *r;
int save_errno = errno;
- r.is_user = 0;
+ r = malloc(sizeof(struct uml_pt_regs));
+ if (!r)
+ panic("out of memory");
+
+ r->is_user = 0;
if (sig == SIGSEGV) {
/* For segfaults, we want the data from the sigcontext. */
- get_regs_from_mc(&r, mc);
- GET_FAULTINFO_FROM_MC(r.faultinfo, mc);
+ get_regs_from_mc(r, mc);
+ GET_FAULTINFO_FROM_MC(r->faultinfo, mc);
}
/* enable signals if sig isn't IRQ signal */
if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGALRM))
unblock_signals();
- (*sig_info[sig])(sig, si, &r);
+ (*sig_info[sig])(sig, si, r);
errno = save_errno;
+
+ free(r);
}
/*
@@ -83,11 +89,17 @@ void sig_handler(int sig, struct siginfo *si, mcontext_t *mc)
static void timer_real_alarm_handler(mcontext_t *mc)
{
- struct uml_pt_regs regs;
+ struct uml_pt_regs *regs;
+
+ regs = malloc(sizeof(struct uml_pt_regs));
+ if (!regs)
+ panic("out of memory");
if (mc != NULL)
- get_regs_from_mc(&regs, mc);
- timer_handler(SIGALRM, NULL, &regs);
+ get_regs_from_mc(regs, mc);
+ timer_handler(SIGALRM, NULL, regs);
+
+ free(regs);
}
void timer_alarm_handler(int sig, struct siginfo *unused_si, mcontext_t *mc)