Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:
 "Most changes are bug fixes and cleanups"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: missing checks of __put_user()/__get_user() return values
  um: stub_rt_sigsuspend isn't needed these days anymore
  um/x86: merge (and trim) 32- and 64-bit variants of ptrace.h
  irq: Remove irq_chip->release()
  um: Remove CONFIG_IRQ_RELEASE_METHOD
  um: Remove usage of irq_chip->release()
  um: Implement um_free_irq()
  um: Fix __swp_type()
  um: Implement a custom pte_same() function
  um: Add BUG() to do_ops()'s error path
  um: Remove unused variables
  um: bury unused _TIF_RESTORE_SIGMASK
  um: wrong sigmask saved in case of multiple sigframes
  um: add TIF_NOTIFY_RESUME
  um: ->restart_block.fn needs to be reset on sigreturn

1 files changed, 63 insertions, 4 deletions

diff --git a/arch/x86/um/shared/sysdep/ptrace.h b/arch/x86/um/shared/sysdep/ptrace.h
index 2bbe1ec2d96..6ce2d76eb90 100644
--- a/arch/x86/um/shared/sysdep/ptrace.h
+++ b/arch/x86/um/shared/sysdep/ptrace.h
@@ -1,15 +1,74 @@
 #ifndef __SYSDEP_X86_PTRACE_H
 #define __SYSDEP_X86_PTRACE_H
 
+#include <generated/user_constants.h>
+#include "sysdep/faultinfo.h"
+
+#define MAX_REG_OFFSET (UM_FRAME_SIZE)
+#define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long))
+
+#define REGS_IP(r) ((r)[HOST_IP])
+#define REGS_SP(r) ((r)[HOST_SP])
+#define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
+#define REGS_AX(r) ((r)[HOST_AX])
+#define REGS_BX(r) ((r)[HOST_BX])
+#define REGS_CX(r) ((r)[HOST_CX])
+#define REGS_DX(r) ((r)[HOST_DX])
+#define REGS_SI(r) ((r)[HOST_SI])
+#define REGS_DI(r) ((r)[HOST_DI])
+#define REGS_BP(r) ((r)[HOST_BP])
+#define REGS_CS(r) ((r)[HOST_CS])
+#define REGS_SS(r) ((r)[HOST_SS])
+#define REGS_DS(r) ((r)[HOST_DS])
+#define REGS_ES(r) ((r)[HOST_ES])
+
+#define UPT_IP(r) REGS_IP((r)->gp)
+#define UPT_SP(r) REGS_SP((r)->gp)
+#define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
+#define UPT_AX(r) REGS_AX((r)->gp)
+#define UPT_BX(r) REGS_BX((r)->gp)
+#define UPT_CX(r) REGS_CX((r)->gp)
+#define UPT_DX(r) REGS_DX((r)->gp)
+#define UPT_SI(r) REGS_SI((r)->gp)
+#define UPT_DI(r) REGS_DI((r)->gp)
+#define UPT_BP(r) REGS_BP((r)->gp)
+#define UPT_CS(r) REGS_CS((r)->gp)
+#define UPT_SS(r) REGS_SS((r)->gp)
+#define UPT_DS(r) REGS_DS((r)->gp)
+#define UPT_ES(r) REGS_ES((r)->gp)
+
 #ifdef __i386__
 #include "ptrace_32.h"
 #else
 #include "ptrace_64.h"
 #endif
 
-static inline long regs_return_value(struct uml_pt_regs *regs)
-{
-	return UPT_SYSCALL_RET(regs);
-}
+struct syscall_args {
+	unsigned long args[6];
+};
+
+#define SYSCALL_ARGS(r) ((struct syscall_args) \
+			 { .args = { UPT_SYSCALL_ARG1(r),	 \
+				     UPT_SYSCALL_ARG2(r),	 \
+				     UPT_SYSCALL_ARG3(r),	 \
+				     UPT_SYSCALL_ARG4(r),	 \
+				     UPT_SYSCALL_ARG5(r),	 \
+				     UPT_SYSCALL_ARG6(r) } } )
+
+struct uml_pt_regs {
+	unsigned long gp[MAX_REG_NR];
+	unsigned long fp[MAX_FP_NR];
+	struct faultinfo faultinfo;
+	long syscall;
+	int is_user;
+};
+
+#define EMPTY_UML_PT_REGS { }
+
+#define UPT_SYSCALL_NR(r) ((r)->syscall)
+#define UPT_FAULTINFO(r) (&(r)->faultinfo)
+#define UPT_IS_USER(r) ((r)->is_user)
+
+extern int user_context(unsigned long sp);
 
 #endif /* __SYSDEP_X86_PTRACE_H */