--- /dev/null
+/*
+ * Some macros to handle stack frames in assembly.
+ */
+
+
+#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
+ CFI_RESTORE r11
+ .endif
+ .if \skipr8910
+ .else
+ movq 1*8(%rsp),%r10
+ CFI_RESTORE r10
+ movq 2*8(%rsp),%r9
+ CFI_RESTORE r9
+ movq 3*8(%rsp),%r8
+ CFI_RESTORE r8
+ .endif
+ .if \skiprax
+ .else
+ movq 4*8(%rsp),%rax
+ CFI_RESTORE rax
+ .endif
+ .if \skiprcx
+ .else
+ movq 5*8(%rsp),%rcx
+ CFI_RESTORE rcx
+ .endif
+ .if \skiprdx
+ .else
+ movq 6*8(%rsp),%rdx
+ CFI_RESTORE rdx
+ .endif
+ movq 7*8(%rsp),%rsi
+ CFI_RESTORE rsi
+ movq 8*8(%rsp),%rdi
+ CFI_RESTORE 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
+ CFI_RESTORE r15
+ movq 1*8(%rsp),%r14
+ CFI_RESTORE r14
+ movq 2*8(%rsp),%r13
+ CFI_RESTORE r13
+ movq 3*8(%rsp),%r12
+ CFI_RESTORE r12
+ movq 4*8(%rsp),%rbp
+ CFI_RESTORE rbp
+ movq 5*8(%rsp),%rbx
+ CFI_RESTORE 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
