123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225 |
- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _ASM_X86_ASM_H
- #define _ASM_X86_ASM_H
- #ifdef __ASSEMBLY__
- # define __ASM_FORM(x, ...) x,## __VA_ARGS__
- # define __ASM_FORM_RAW(x, ...) x,## __VA_ARGS__
- # define __ASM_FORM_COMMA(x, ...) x,## __VA_ARGS__,
- # define __ASM_REGPFX %
- #else
- #include <linux/stringify.h>
- # define __ASM_FORM(x, ...) " " __stringify(x,##__VA_ARGS__) " "
- # define __ASM_FORM_RAW(x, ...) __stringify(x,##__VA_ARGS__)
- # define __ASM_FORM_COMMA(x, ...) " " __stringify(x,##__VA_ARGS__) ","
- # define __ASM_REGPFX %%
- #endif
- #define _ASM_BYTES(x, ...) __ASM_FORM(.byte x,##__VA_ARGS__ ;)
- #ifndef __x86_64__
- /* 32 bit */
- # define __ASM_SEL(a,b) __ASM_FORM(a)
- # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a)
- #else
- /* 64 bit */
- # define __ASM_SEL(a,b) __ASM_FORM(b)
- # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b)
- #endif
- #define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \
- inst##q##__VA_ARGS__)
- #define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg)
- #define _ASM_PTR __ASM_SEL(.long, .quad)
- #define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8)
- #define _ASM_MOV __ASM_SIZE(mov)
- #define _ASM_INC __ASM_SIZE(inc)
- #define _ASM_DEC __ASM_SIZE(dec)
- #define _ASM_ADD __ASM_SIZE(add)
- #define _ASM_SUB __ASM_SIZE(sub)
- #define _ASM_XADD __ASM_SIZE(xadd)
- #define _ASM_MUL __ASM_SIZE(mul)
- #define _ASM_AX __ASM_REG(ax)
- #define _ASM_BX __ASM_REG(bx)
- #define _ASM_CX __ASM_REG(cx)
- #define _ASM_DX __ASM_REG(dx)
- #define _ASM_SP __ASM_REG(sp)
- #define _ASM_BP __ASM_REG(bp)
- #define _ASM_SI __ASM_REG(si)
- #define _ASM_DI __ASM_REG(di)
- /* Adds a (%rip) suffix on 64 bits only; for immediate memory references */
- #define _ASM_RIP(x) __ASM_SEL_RAW(x, x (__ASM_REGPFX rip))
- #ifndef __x86_64__
- /* 32 bit */
- #define _ASM_ARG1 _ASM_AX
- #define _ASM_ARG2 _ASM_DX
- #define _ASM_ARG3 _ASM_CX
- #define _ASM_ARG1L eax
- #define _ASM_ARG2L edx
- #define _ASM_ARG3L ecx
- #define _ASM_ARG1W ax
- #define _ASM_ARG2W dx
- #define _ASM_ARG3W cx
- #define _ASM_ARG1B al
- #define _ASM_ARG2B dl
- #define _ASM_ARG3B cl
- #else
- /* 64 bit */
- #define _ASM_ARG1 _ASM_DI
- #define _ASM_ARG2 _ASM_SI
- #define _ASM_ARG3 _ASM_DX
- #define _ASM_ARG4 _ASM_CX
- #define _ASM_ARG5 r8
- #define _ASM_ARG6 r9
- #define _ASM_ARG1Q rdi
- #define _ASM_ARG2Q rsi
- #define _ASM_ARG3Q rdx
- #define _ASM_ARG4Q rcx
- #define _ASM_ARG5Q r8
- #define _ASM_ARG6Q r9
- #define _ASM_ARG1L edi
- #define _ASM_ARG2L esi
- #define _ASM_ARG3L edx
- #define _ASM_ARG4L ecx
- #define _ASM_ARG5L r8d
- #define _ASM_ARG6L r9d
- #define _ASM_ARG1W di
- #define _ASM_ARG2W si
- #define _ASM_ARG3W dx
- #define _ASM_ARG4W cx
- #define _ASM_ARG5W r8w
- #define _ASM_ARG6W r9w
- #define _ASM_ARG1B dil
- #define _ASM_ARG2B sil
- #define _ASM_ARG3B dl
- #define _ASM_ARG4B cl
- #define _ASM_ARG5B r8b
- #define _ASM_ARG6B r9b
- #endif
- /*
- * Macros to generate condition code outputs from inline assembly,
- * The output operand must be type "bool".
- */
- #ifdef __GCC_ASM_FLAG_OUTPUTS__
- # define CC_SET(c) "\n\t/* output condition code " #c "*/\n"
- # define CC_OUT(c) "=@cc" #c
- #else
- # define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n"
- # define CC_OUT(c) [_cc_ ## c] "=qm"
- #endif
- #ifdef __KERNEL__
- # include <asm/extable_fixup_types.h>
- /* Exception table entry */
- #ifdef __ASSEMBLY__
- # define _ASM_EXTABLE_TYPE(from, to, type) \
- .pushsection "__ex_table","a" ; \
- .balign 4 ; \
- .long (from) - . ; \
- .long (to) - . ; \
- .long type ; \
- .popsection
- # ifdef CONFIG_KPROBES
- # define _ASM_NOKPROBE(entry) \
- .pushsection "_kprobe_blacklist","aw" ; \
- _ASM_ALIGN ; \
- _ASM_PTR (entry); \
- .popsection
- # else
- # define _ASM_NOKPROBE(entry)
- # endif
- #else /* ! __ASSEMBLY__ */
- # define DEFINE_EXTABLE_TYPE_REG \
- ".macro extable_type_reg type:req reg:req\n" \
- ".set .Lfound, 0\n" \
- ".set .Lregnr, 0\n" \
- ".irp rs,rax,rcx,rdx,rbx,rsp,rbp,rsi,rdi,r8,r9,r10,r11,r12,r13,r14,r15\n" \
- ".ifc \\reg, %%\\rs\n" \
- ".set .Lfound, .Lfound+1\n" \
- ".long \\type + (.Lregnr << 8)\n" \
- ".endif\n" \
- ".set .Lregnr, .Lregnr+1\n" \
- ".endr\n" \
- ".set .Lregnr, 0\n" \
- ".irp rs,eax,ecx,edx,ebx,esp,ebp,esi,edi,r8d,r9d,r10d,r11d,r12d,r13d,r14d,r15d\n" \
- ".ifc \\reg, %%\\rs\n" \
- ".set .Lfound, .Lfound+1\n" \
- ".long \\type + (.Lregnr << 8)\n" \
- ".endif\n" \
- ".set .Lregnr, .Lregnr+1\n" \
- ".endr\n" \
- ".if (.Lfound != 1)\n" \
- ".error \"extable_type_reg: bad register argument\"\n" \
- ".endif\n" \
- ".endm\n"
- # define UNDEFINE_EXTABLE_TYPE_REG \
- ".purgem extable_type_reg\n"
- # define _ASM_EXTABLE_TYPE(from, to, type) \
- " .pushsection \"__ex_table\",\"a\"\n" \
- " .balign 4\n" \
- " .long (" #from ") - .\n" \
- " .long (" #to ") - .\n" \
- " .long " __stringify(type) " \n" \
- " .popsection\n"
- # define _ASM_EXTABLE_TYPE_REG(from, to, type, reg) \
- " .pushsection \"__ex_table\",\"a\"\n" \
- " .balign 4\n" \
- " .long (" #from ") - .\n" \
- " .long (" #to ") - .\n" \
- DEFINE_EXTABLE_TYPE_REG \
- "extable_type_reg reg=" __stringify(reg) ", type=" __stringify(type) " \n"\
- UNDEFINE_EXTABLE_TYPE_REG \
- " .popsection\n"
- /* For C file, we already have NOKPROBE_SYMBOL macro */
- /*
- * This output constraint should be used for any inline asm which has a "call"
- * instruction. Otherwise the asm may be inserted before the frame pointer
- * gets set up by the containing function. If you forget to do this, objtool
- * may print a "call without frame pointer save/setup" warning.
- */
- register unsigned long current_stack_pointer asm(_ASM_SP);
- #define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer)
- #endif /* __ASSEMBLY__ */
- #define _ASM_EXTABLE(from, to) \
- _ASM_EXTABLE_TYPE(from, to, EX_TYPE_DEFAULT)
- #define _ASM_EXTABLE_UA(from, to) \
- _ASM_EXTABLE_TYPE(from, to, EX_TYPE_UACCESS)
- #define _ASM_EXTABLE_CPY(from, to) \
- _ASM_EXTABLE_TYPE(from, to, EX_TYPE_COPY)
- #define _ASM_EXTABLE_FAULT(from, to) \
- _ASM_EXTABLE_TYPE(from, to, EX_TYPE_FAULT)
- #endif /* __KERNEL__ */
- #endif /* _ASM_X86_ASM_H */
|