#include <errno.h>
#include <string.h>
-#include <sys/ptrace.h>
+#include "sysdep/ptrace_user.h"
#include "sysdep/ptrace.h"
#include "uml-config.h"
#include "skas_ptregs.h"
#include "registers.h"
+#include "longjmp.h"
#include "user.h"
/* These are set once at boot time and not changed thereafter */
-static unsigned long exec_regs[HOST_FRAME_SIZE];
+static unsigned long exec_regs[MAX_REG_NR];
static unsigned long exec_fp_regs[HOST_FP_SIZE];
static unsigned long exec_fpx_regs[HOST_XFP_SIZE];
static int have_fpx_regs = 1;
memcpy(to->skas.xfp, exec_fpx_regs, sizeof(to->skas.xfp));
}
+/* XXX These need to use [GS]ETFPXREGS and copy_sc_{to,from}_user_skas needs
+ * to pass in a sufficiently large buffer
+ */
+int save_fp_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)
+{
+ if(ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
+ return(-errno);
+ return(0);
+}
+
static int move_registers(int pid, int int_op, union uml_pt_regs *regs,
int fp_op, unsigned long *fp_regs)
{
{
int err;
+ memset(exec_regs, 0, sizeof(exec_regs));
err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
if(err)
panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
- err);
+ errno);
+ errno = 0;
err = ptrace(PTRACE_GETFPXREGS, pid, 0, exec_fpx_regs);
if(!err)
return;
+ if(errno != EIO)
+ panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
+ errno);
have_fpx_regs = 0;
- if(err != EIO)
- panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
- err);
err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs);
if(err)
panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d",
- err);
+ errno);
}
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+void get_safe_registers(unsigned long *regs, unsigned long *fp_regs)
+{
+ memcpy(regs, exec_regs, sizeof(exec_regs));
+ if(fp_regs != NULL)
+ memcpy(fp_regs, exec_fp_regs,
+ HOST_FP_SIZE * sizeof(unsigned long));
+}
+
+unsigned long get_thread_reg(int reg, jmp_buf *buf)
+{
+ switch(reg){
+ case EIP: return buf[0]->__eip;
+ case UESP: return buf[0]->__esp;
+ case EBP: return buf[0]->__ebp;
+ default:
+ printk("get_thread_regs - unknown register %d\n", reg);
+ return 0;
+ }
+}