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-rw-r--r--arch/x86/include/asm/calling.h247
1 files changed, 0 insertions, 247 deletions
diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h
deleted file mode 100644
index 1c8b50edb..000000000
--- a/arch/x86/include/asm/calling.h
+++ /dev/null
@@ -1,247 +0,0 @@
-/*
-
- x86 function call convention, 64-bit:
- -------------------------------------
- arguments | callee-saved | extra caller-saved | return
- [callee-clobbered] | | [callee-clobbered] |
- ---------------------------------------------------------------------------
- rdi rsi rdx rcx r8-9 | rbx rbp [*] r12-15 | r10-11 | rax, rdx [**]
-
- ( rsp is obviously invariant across normal function calls. (gcc can 'merge'
- functions when it sees tail-call optimization possibilities) rflags is
- clobbered. Leftover arguments are passed over the stack frame.)
-
- [*] In the frame-pointers case rbp is fixed to the stack frame.
-
- [**] for struct return values wider than 64 bits the return convention is a
- bit more complex: up to 128 bits width we return small structures
- straight in rax, rdx. For structures larger than that (3 words or
- larger) the caller puts a pointer to an on-stack return struct
- [allocated in the caller's stack frame] into the first argument - i.e.
- into rdi. All other arguments shift up by one in this case.
- Fortunately this case is rare in the kernel.
-
-For 32-bit we have the following conventions - kernel is built with
--mregparm=3 and -freg-struct-return:
-
- x86 function calling convention, 32-bit:
- ----------------------------------------
- arguments | callee-saved | extra caller-saved | return
- [callee-clobbered] | | [callee-clobbered] |
- -------------------------------------------------------------------------
- eax edx ecx | ebx edi esi ebp [*] | <none> | eax, edx [**]
-
- ( here too esp is obviously invariant across normal function calls. eflags
- is clobbered. Leftover arguments are passed over the stack frame. )
-
- [*] In the frame-pointers case ebp is fixed to the stack frame.
-
- [**] We build with -freg-struct-return, which on 32-bit means similar
- semantics as on 64-bit: edx can be used for a second return value
- (i.e. covering integer and structure sizes up to 64 bits) - after that
- it gets more complex and more expensive: 3-word or larger struct returns
- get done in the caller's frame and the pointer to the return struct goes
- into regparm0, i.e. eax - the other arguments shift up and the
- function's register parameters degenerate to regparm=2 in essence.
-
-*/
-
-#include <asm/dwarf2.h>
-
-#ifdef CONFIG_X86_64
-
-/*
- * 64-bit system call stack frame layout defines and helpers,
- * for assembly code:
- */
-
-/* The layout forms the "struct pt_regs" on the stack: */
-/*
- * C ABI says these regs are callee-preserved. They aren't saved on kernel entry
- * unless syscall needs a complete, fully filled "struct pt_regs".
- */
-#define R15 0*8
-#define R14 1*8
-#define R13 2*8
-#define R12 3*8
-#define RBP 4*8
-#define RBX 5*8
-/* These regs are callee-clobbered. Always saved on kernel entry. */
-#define R11 6*8
-#define R10 7*8
-#define R9 8*8
-#define R8 9*8
-#define RAX 10*8
-#define RCX 11*8
-#define RDX 12*8
-#define RSI 13*8
-#define RDI 14*8
-/*
- * On syscall entry, this is syscall#. On CPU exception, this is error code.
- * On hw interrupt, it's IRQ number:
- */
-#define ORIG_RAX 15*8
-/* Return frame for iretq */
-#define RIP 16*8
-#define CS 17*8
-#define EFLAGS 18*8
-#define RSP 19*8
-#define SS 20*8
-
-#define SIZEOF_PTREGS 21*8
-
- .macro ALLOC_PT_GPREGS_ON_STACK addskip=0
- subq $15*8+\addskip, %rsp
- CFI_ADJUST_CFA_OFFSET 15*8+\addskip
- .endm
-
- .macro SAVE_C_REGS_HELPER offset=0 rax=1 rcx=1 r8910=1 r11=1
- .if \r11
- movq_cfi r11, 6*8+\offset
- .endif
- .if \r8910
- movq_cfi r10, 7*8+\offset
- movq_cfi r9, 8*8+\offset
- movq_cfi r8, 9*8+\offset
- .endif
- .if \rax
- movq_cfi rax, 10*8+\offset
- .endif
- .if \rcx
- movq_cfi rcx, 11*8+\offset
- .endif
- movq_cfi rdx, 12*8+\offset
- movq_cfi rsi, 13*8+\offset
- movq_cfi rdi, 14*8+\offset
- .endm
- .macro SAVE_C_REGS offset=0
- SAVE_C_REGS_HELPER \offset, 1, 1, 1, 1
- .endm
- .macro SAVE_C_REGS_EXCEPT_RAX_RCX offset=0
- SAVE_C_REGS_HELPER \offset, 0, 0, 1, 1
- .endm
- .macro SAVE_C_REGS_EXCEPT_R891011
- SAVE_C_REGS_HELPER 0, 1, 1, 0, 0
- .endm
- .macro SAVE_C_REGS_EXCEPT_RCX_R891011
- SAVE_C_REGS_HELPER 0, 1, 0, 0, 0
- .endm
- .macro SAVE_C_REGS_EXCEPT_RAX_RCX_R11
- SAVE_C_REGS_HELPER 0, 0, 0, 1, 0
- .endm
-
- .macro SAVE_EXTRA_REGS offset=0
- movq_cfi r15, 0*8+\offset
- movq_cfi r14, 1*8+\offset
- movq_cfi r13, 2*8+\offset
- movq_cfi r12, 3*8+\offset
- movq_cfi rbp, 4*8+\offset
- movq_cfi rbx, 5*8+\offset
- .endm
- .macro SAVE_EXTRA_REGS_RBP offset=0
- movq_cfi rbp, 4*8+\offset
- .endm
-
- .macro RESTORE_EXTRA_REGS offset=0
- movq_cfi_restore 0*8+\offset, r15
- movq_cfi_restore 1*8+\offset, r14
- movq_cfi_restore 2*8+\offset, r13
- movq_cfi_restore 3*8+\offset, r12
- movq_cfi_restore 4*8+\offset, rbp
- movq_cfi_restore 5*8+\offset, rbx
- .endm
-
- .macro ZERO_EXTRA_REGS
- xorl %r15d, %r15d
- xorl %r14d, %r14d
- xorl %r13d, %r13d
- xorl %r12d, %r12d
- xorl %ebp, %ebp
- xorl %ebx, %ebx
- .endm
-
- .macro RESTORE_C_REGS_HELPER rstor_rax=1, rstor_rcx=1, rstor_r11=1, rstor_r8910=1, rstor_rdx=1
- .if \rstor_r11
- movq_cfi_restore 6*8, r11
- .endif
- .if \rstor_r8910
- movq_cfi_restore 7*8, r10
- movq_cfi_restore 8*8, r9
- movq_cfi_restore 9*8, r8
- .endif
- .if \rstor_rax
- movq_cfi_restore 10*8, rax
- .endif
- .if \rstor_rcx
- movq_cfi_restore 11*8, rcx
- .endif
- .if \rstor_rdx
- movq_cfi_restore 12*8, rdx
- .endif
- movq_cfi_restore 13*8, rsi
- movq_cfi_restore 14*8, rdi
- .endm
- .macro RESTORE_C_REGS
- RESTORE_C_REGS_HELPER 1,1,1,1,1
- .endm
- .macro RESTORE_C_REGS_EXCEPT_RAX
- RESTORE_C_REGS_HELPER 0,1,1,1,1
- .endm
- .macro RESTORE_C_REGS_EXCEPT_RCX
- RESTORE_C_REGS_HELPER 1,0,1,1,1
- .endm
- .macro RESTORE_C_REGS_EXCEPT_R11
- RESTORE_C_REGS_HELPER 1,1,0,1,1
- .endm
- .macro RESTORE_C_REGS_EXCEPT_RCX_R11
- RESTORE_C_REGS_HELPER 1,0,0,1,1
- .endm
- .macro RESTORE_RSI_RDI
- RESTORE_C_REGS_HELPER 0,0,0,0,0
- .endm
- .macro RESTORE_RSI_RDI_RDX
- RESTORE_C_REGS_HELPER 0,0,0,0,1
- .endm
-
- .macro REMOVE_PT_GPREGS_FROM_STACK addskip=0
- addq $15*8+\addskip, %rsp
- CFI_ADJUST_CFA_OFFSET -(15*8+\addskip)
- .endm
-
- .macro icebp
- .byte 0xf1
- .endm
-
-#else /* CONFIG_X86_64 */
-
-/*
- * For 32bit only simplified versions of SAVE_ALL/RESTORE_ALL. These
- * are different from the entry_32.S versions in not changing the segment
- * registers. So only suitable for in kernel use, not when transitioning
- * from or to user space. The resulting stack frame is not a standard
- * pt_regs frame. The main use case is calling C code from assembler
- * when all the registers need to be preserved.
- */
-
- .macro SAVE_ALL
- pushl_cfi_reg eax
- pushl_cfi_reg ebp
- pushl_cfi_reg edi
- pushl_cfi_reg esi
- pushl_cfi_reg edx
- pushl_cfi_reg ecx
- pushl_cfi_reg ebx
- .endm
-
- .macro RESTORE_ALL
- popl_cfi_reg ebx
- popl_cfi_reg ecx
- popl_cfi_reg edx
- popl_cfi_reg esi
- popl_cfi_reg edi
- popl_cfi_reg ebp
- popl_cfi_reg eax
- .endm
-
-#endif /* CONFIG_X86_64 */
-