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Diffstat (limited to 'sys/mips/include/asmacros.h')
| -rw-r--r-- | sys/mips/include/asmacros.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/sys/mips/include/asmacros.h b/sys/mips/include/asmacros.h new file mode 100644 index 0000000..c2cc13e --- /dev/null +++ b/sys/mips/include/asmacros.h @@ -0,0 +1,195 @@ +/*- + * Copyright (c) 1993 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_ASMACROS_H_ +#define _MACHINE_ASMACROS_H_ + +#include <sys/cdefs.h> + +#if 0 +/* XXX too much duplication in various asm*.h's. */ + +/* + * CNAME and HIDENAME manage the relationship between symbol names in C + * and the equivalent assembly language names. CNAME is given a name as + * it would be used in a C program. It expands to the equivalent assembly + * language name. HIDENAME is given an assembly-language name, and expands + * to a possibly-modified form that will be invisible to C programs. + */ +#define CNAME(csym) csym +#define HIDENAME(asmsym) .asmsym + +#define ALIGN_DATA .p2align 3 /* 8 byte alignment, zero filled */ +#ifdef GPROF +#define ALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */ +#else +#define ALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */ +#endif +#define SUPERALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */ + +#define GEN_ENTRY(name) ALIGN_TEXT; .globl CNAME(name); \ + .type CNAME(name),@function; CNAME(name): +#define NON_GPROF_ENTRY(name) GEN_ENTRY(name) +#define NON_GPROF_RET .byte 0xc3 /* opcode for `ret' */ + +#ifdef GPROF +/* + * __mcount is like [.]mcount except that doesn't require its caller to set + * up a frame pointer. It must be called before pushing anything onto the + * stack. gcc should eventually generate code to call __mcount in most + * cases. This would make -pg in combination with -fomit-frame-pointer + * useful. gcc has a configuration variable PROFILE_BEFORE_PROLOGUE to + * allow profiling before setting up the frame pointer, but this is + * inadequate for good handling of special cases, e.g., -fpic works best + * with profiling after the prologue. + * + * [.]mexitcount is a new function to support non-statistical profiling if an + * accurate clock is available. For C sources, calls to it are generated + * by the FreeBSD extension `-mprofiler-epilogue' to gcc. It is best to + * call [.]mexitcount at the end of a function like the MEXITCOUNT macro does, + * but gcc currently generates calls to it at the start of the epilogue to + * avoid problems with -fpic. + * + * [.]mcount and __mcount may clobber the call-used registers and %ef. + * [.]mexitcount may clobber %ecx and %ef. + * + * Cross-jumping makes non-statistical profiling timing more complicated. + * It is handled in many cases by calling [.]mexitcount before jumping. It + * is handled for conditional jumps using CROSSJUMP() and CROSSJUMP_LABEL(). + * It is handled for some fault-handling jumps by not sharing the exit + * routine. + * + * ALTENTRY() must be before a corresponding ENTRY() so that it can jump to + * the main entry point. Note that alt entries are counted twice. They + * have to be counted as ordinary entries for gprof to get the call times + * right for the ordinary entries. + * + * High local labels are used in macros to avoid clashes with local labels + * in functions. + * + * Ordinary `ret' is used instead of a macro `RET' because there are a lot + * of `ret's. 0xc3 is the opcode for `ret' (`#define ret ... ret' can't + * be used because this file is sometimes preprocessed in traditional mode). + * `ret' clobbers eflags but this doesn't matter. + */ +#define ALTENTRY(name) GEN_ENTRY(name) ; MCOUNT ; MEXITCOUNT ; jmp 9f +#define CROSSJUMP(jtrue, label, jfalse) \ + jfalse 8f; MEXITCOUNT; jmp __CONCAT(to,label); 8: +#define CROSSJUMPTARGET(label) \ + ALIGN_TEXT; __CONCAT(to,label): ; MCOUNT; jmp label +#define ENTRY(name) GEN_ENTRY(name) ; 9: ; MCOUNT +#define FAKE_MCOUNT(caller) pushq caller ; call __mcount ; popq %rcx +#define MCOUNT call __mcount +#define MCOUNT_LABEL(name) GEN_ENTRY(name) ; nop ; ALIGN_TEXT +#define MEXITCOUNT call HIDENAME(mexitcount) +#define ret MEXITCOUNT ; NON_GPROF_RET + +#else /* !GPROF */ +/* + * ALTENTRY() has to align because it is before a corresponding ENTRY(). + * ENTRY() has to align to because there may be no ALTENTRY() before it. + * If there is a previous ALTENTRY() then the alignment code for ENTRY() + * is empty. + */ +#define ALTENTRY(name) GEN_ENTRY(name) +#define CROSSJUMP(jtrue, label, jfalse) jtrue label +#define CROSSJUMPTARGET(label) +#define ENTRY(name) GEN_ENTRY(name) +#define FAKE_MCOUNT(caller) +#define MCOUNT +#define MCOUNT_LABEL(name) +#define MEXITCOUNT +#endif /* GPROF */ + +#ifdef LOCORE +/* + * Convenience macro for declaring interrupt entry points. + */ +#define IDTVEC(name) ALIGN_TEXT; .globl __CONCAT(X,name); \ + .type __CONCAT(X,name),@function; __CONCAT(X,name): + +/* + * Macros to create and destroy a trap frame. + */ +#define PUSH_FRAME \ + subq $TF_RIP,%rsp ; /* skip dummy tf_err and tf_trapno */ \ + testb $SEL_RPL_MASK,TF_CS(%rsp) ; /* come from kernel? */ \ + jz 1f ; /* Yes, dont swapgs again */ \ + swapgs ; \ +1: movq %rdi,TF_RDI(%rsp) ; \ + movq %rsi,TF_RSI(%rsp) ; \ + movq %rdx,TF_RDX(%rsp) ; \ + movq %rcx,TF_RCX(%rsp) ; \ + movq %r8,TF_R8(%rsp) ; \ + movq %r9,TF_R9(%rsp) ; \ + movq %rax,TF_RAX(%rsp) ; \ + movq %rbx,TF_RBX(%rsp) ; \ + movq %rbp,TF_RBP(%rsp) ; \ + movq %r10,TF_R10(%rsp) ; \ + movq %r11,TF_R11(%rsp) ; \ + movq %r12,TF_R12(%rsp) ; \ + movq %r13,TF_R13(%rsp) ; \ + movq %r14,TF_R14(%rsp) ; \ + movq %r15,TF_R15(%rsp) + +#define POP_FRAME \ + movq TF_RDI(%rsp),%rdi ; \ + movq TF_RSI(%rsp),%rsi ; \ + movq TF_RDX(%rsp),%rdx ; \ + movq TF_RCX(%rsp),%rcx ; \ + movq TF_R8(%rsp),%r8 ; \ + movq TF_R9(%rsp),%r9 ; \ + movq TF_RAX(%rsp),%rax ; \ + movq TF_RBX(%rsp),%rbx ; \ + movq TF_RBP(%rsp),%rbp ; \ + movq TF_R10(%rsp),%r10 ; \ + movq TF_R11(%rsp),%r11 ; \ + movq TF_R12(%rsp),%r12 ; \ + movq TF_R13(%rsp),%r13 ; \ + movq TF_R14(%rsp),%r14 ; \ + movq TF_R15(%rsp),%r15 ; \ + testb $SEL_RPL_MASK,TF_CS(%rsp) ; /* come from kernel? */ \ + jz 1f ; /* keep kernel GS.base */ \ + cli ; \ + swapgs ; \ +1: addq $TF_RIP,%rsp /* skip over tf_err, tf_trapno */ + +/* + * Access per-CPU data. + */ +#define PCPU(member) %gs:PC_ ## member +#define PCPU_ADDR(member, reg) \ + movq %gs:PC_PRVSPACE, reg ; \ + addq $PC_ ## member, reg + +#endif /* LOCORE */ +#endif +#endif /* !_MACHINE_ASMACROS_H_ */ |
