1 files changed, 156 insertions, 0 deletions

diff --git a/include/asm-x86_64/calling.h b/include/asm-x86_64/calling.h
new file mode 100644
index 000000000000..0bc12655fa5b
--- /dev/null
+++ b/include/asm-x86_64/calling.h
@@ -0,0 +1,156 @@
+/* 
+ * Some macros to handle stack frames in assembly.
+ */ 
+
+#include <linux/config.h>
+
+#define R15 0
+#define R14 8
+#define R13 16
+#define R12 24
+#define RBP 32
+#define RBX 40
+/* arguments: interrupts/non tracing syscalls only save upto here*/
+#define R11 48
+#define R10 56  
+#define R9 64
+#define R8 72
+#define RAX 80
+#define RCX 88
+#define RDX 96
+#define RSI 104
+#define RDI 112
+#define ORIG_RAX 120       /* + error_code */ 
+/* end of arguments */  
+/* cpu exception frame or undefined in case of fast syscall. */
+#define RIP 128
+#define CS 136
+#define EFLAGS 144
+#define RSP 152
+#define SS 160
+#define ARGOFFSET R11
+#define SWFRAME ORIG_RAX
+
+        .macro SAVE_ARGS addskip=0,norcx=0,nor891011=0
+        subq  $9*8+\addskip,%rsp
+        CFI_ADJUST_CFA_OFFSET   9*8+\addskip
+        movq  %rdi,8*8(%rsp) 
+        CFI_REL_OFFSET  rdi,8*8
+        movq  %rsi,7*8(%rsp) 
+        CFI_REL_OFFSET  rsi,7*8
+        movq  %rdx,6*8(%rsp)
+        CFI_REL_OFFSET  rdx,6*8
+        .if \norcx
+        .else
+        movq  %rcx,5*8(%rsp)
+        CFI_REL_OFFSET  rcx,5*8
+        .endif
+        movq  %rax,4*8(%rsp) 
+        CFI_REL_OFFSET  rax,4*8
+        .if \nor891011
+        .else
+        movq  %r8,3*8(%rsp) 
+        CFI_REL_OFFSET  r8,3*8
+        movq  %r9,2*8(%rsp) 
+        CFI_REL_OFFSET  r9,2*8
+        movq  %r10,1*8(%rsp) 
+        CFI_REL_OFFSET  r10,1*8
+        movq  %r11,(%rsp) 
+        CFI_REL_OFFSET  r11,0*8
+        .endif
+        .endm
+
+#define ARG_SKIP 9*8
+        .macro RESTORE_ARGS skiprax=0,addskip=0,skiprcx=0,skipr11=0,skipr8910=0,skiprdx=0
+        .if \skipr11
+        .else
+        movq (%rsp),%r11
+        .endif
+        .if \skipr8910
+        .else
+        movq 1*8(%rsp),%r10
+        movq 2*8(%rsp),%r9
+        movq 3*8(%rsp),%r8
+        .endif
+        .if \skiprax
+        .else
+        movq 4*8(%rsp),%rax
+        .endif
+        .if \skiprcx
+        .else
+        movq 5*8(%rsp),%rcx
+        .endif
+        .if \skiprdx
+        .else
+        movq 6*8(%rsp),%rdx
+        .endif
+        movq 7*8(%rsp),%rsi
+        movq 8*8(%rsp),%rdi
+        .if ARG_SKIP+\addskip > 0
+        addq $ARG_SKIP+\addskip,%rsp
+        CFI_ADJUST_CFA_OFFSET   -(ARG_SKIP+\addskip)
+        .endif
+        .endm   
+
+        .macro LOAD_ARGS offset
+        movq \offset(%rsp),%r11
+        movq \offset+8(%rsp),%r10
+        movq \offset+16(%rsp),%r9
+        movq \offset+24(%rsp),%r8
+        movq \offset+40(%rsp),%rcx
+        movq \offset+48(%rsp),%rdx
+        movq \offset+56(%rsp),%rsi
+        movq \offset+64(%rsp),%rdi
+        movq \offset+72(%rsp),%rax
+        .endm
+                        
+#define REST_SKIP 6*8                   
+        .macro SAVE_REST
+        subq $REST_SKIP,%rsp
+        CFI_ADJUST_CFA_OFFSET   REST_SKIP
+        movq %rbx,5*8(%rsp) 
+        CFI_REL_OFFSET  rbx,5*8
+        movq %rbp,4*8(%rsp) 
+        CFI_REL_OFFSET  rbp,4*8
+        movq %r12,3*8(%rsp) 
+        CFI_REL_OFFSET  r12,3*8
+        movq %r13,2*8(%rsp) 
+        CFI_REL_OFFSET  r13,2*8
+        movq %r14,1*8(%rsp) 
+        CFI_REL_OFFSET  r14,1*8
+        movq %r15,(%rsp) 
+        CFI_REL_OFFSET  r15,0*8
+        .endm           
+
+        .macro RESTORE_REST
+        movq (%rsp),%r15
+        movq 1*8(%rsp),%r14
+        movq 2*8(%rsp),%r13
+        movq 3*8(%rsp),%r12
+        movq 4*8(%rsp),%rbp
+        movq 5*8(%rsp),%rbx
+        addq $REST_SKIP,%rsp
+        CFI_ADJUST_CFA_OFFSET   -(REST_SKIP)
+        .endm
+                
+        .macro SAVE_ALL
+        SAVE_ARGS
+        SAVE_REST
+        .endm
+                
+        .macro RESTORE_ALL addskip=0
+        RESTORE_REST
+        RESTORE_ARGS 0,\addskip
+        .endm
+
+        .macro icebp
+        .byte 0xf1
+        .endm
+
+#ifdef CONFIG_FRAME_POINTER
+#define ENTER enter
+#define LEAVE leave
+#else
+#define ENTER
+#define LEAVE
+#endif