| /*- |
| * 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 _BSD_MACHINE_ASMACROS_H_ |
| #define _BSD_MACHINE_ASMACROS_H_ |
| |
| #include <sys/bsd_cdefs.h> |
| |
| /* XXX too much duplication in various asm*.h's. */ |
| |
| /* |
| * CNAME is used to 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. |
| */ |
| #define CNAME(csym) csym |
| |
| #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' */ |
| |
| #define END(name) .size name, . - name |
| |
| #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 |
| #ifdef GUPROF |
| #define MEXITCOUNT call .mexitcount |
| #define ret MEXITCOUNT ; NON_GPROF_RET |
| #else |
| #define MEXITCOUNT |
| #endif |
| |
| #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) ; \ |
| movw %fs,TF_FS(%rsp) ; \ |
| movw %gs,TF_GS(%rsp) ; \ |
| movw %es,TF_ES(%rsp) ; \ |
| movw %ds,TF_DS(%rsp) ; \ |
| movl $TF_HASSEGS,TF_FLAGS(%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 /* !_BSD_MACHINE_ASMACROS_H_ */ |
