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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-09-11 04:34:46 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-09-11 04:34:46 -0300
commit863981e96738983919de841ec669e157e6bdaeb0 (patch)
treed6d89a12e7eb8017837c057935a2271290907f76 /arch/x86/um/os-Linux
parent8dec7c70575785729a6a9e6719a955e9c545bcab (diff)
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'arch/x86/um/os-Linux')
-rw-r--r--arch/x86/um/os-Linux/registers.c49
1 files changed, 47 insertions, 2 deletions
diff --git a/arch/x86/um/os-Linux/registers.c b/arch/x86/um/os-Linux/registers.c
index 41bfe84e1..00f54a91b 100644
--- a/arch/x86/um/os-Linux/registers.c
+++ b/arch/x86/um/os-Linux/registers.c
@@ -11,21 +11,56 @@
#endif
#include <longjmp.h>
#include <sysdep/ptrace_user.h>
+#include <sys/uio.h>
+#include <asm/sigcontext.h>
+#include <linux/elf.h>
-int save_fp_registers(int pid, unsigned long *fp_regs)
+int have_xstate_support;
+
+int save_i387_registers(int pid, unsigned long *fp_regs)
{
if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
return -errno;
return 0;
}
-int restore_fp_registers(int pid, unsigned long *fp_regs)
+int save_fp_registers(int pid, unsigned long *fp_regs)
+{
+ struct iovec iov;
+
+ if (have_xstate_support) {
+ iov.iov_base = fp_regs;
+ iov.iov_len = sizeof(struct _xstate);
+ if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
+ return -errno;
+ return 0;
+ } else {
+ return save_i387_registers(pid, fp_regs);
+ }
+}
+
+int restore_i387_registers(int pid, unsigned long *fp_regs)
{
if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
return -errno;
return 0;
}
+int restore_fp_registers(int pid, unsigned long *fp_regs)
+{
+ struct iovec iov;
+
+ if (have_xstate_support) {
+ iov.iov_base = fp_regs;
+ iov.iov_len = sizeof(struct _xstate);
+ if (ptrace(PTRACE_SETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
+ return -errno;
+ return 0;
+ } else {
+ return restore_i387_registers(pid, fp_regs);
+ }
+}
+
#ifdef __i386__
int have_fpx_regs = 1;
int save_fpx_registers(int pid, unsigned long *fp_regs)
@@ -85,6 +120,16 @@ int put_fp_registers(int pid, unsigned long *regs)
return restore_fp_registers(pid, regs);
}
+void arch_init_registers(int pid)
+{
+ struct _xstate fp_regs;
+ struct iovec iov;
+
+ iov.iov_base = &fp_regs;
+ iov.iov_len = sizeof(struct _xstate);
+ if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) == 0)
+ have_xstate_support = 1;
+}
#endif
unsigned long get_thread_reg(int reg, jmp_buf *buf)