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authorAl Viro <viro@zeniv.linux.org.uk>2008-08-17 21:05:42 -0400
committerH. Peter Anvin <hpa@zytor.com>2008-10-22 22:55:20 -0700
commitbb8985586b7a906e116db835c64773b7a7d51663 (patch)
treede93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/calling.h
parent8ede0bdb63305d3353efd97e9af6210afb05734e (diff)
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/calling.h')
-rw-r--r--arch/x86/include/asm/calling.h170
1 files changed, 170 insertions, 0 deletions
diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h
new file mode 100644
index 00000000000..2bc162e0ec6
--- /dev/null
+++ b/arch/x86/include/asm/calling.h
@@ -0,0 +1,170 @@
+/*
+ * 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, skiprax=0
+ 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
+ .if \skiprax
+ .else
+ movq \offset+72(%rsp), %rax
+ .endif
+ .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