diff options
Diffstat (limited to 'sys/arch/arm/include/profile.h')
-rw-r--r-- | sys/arch/arm/include/profile.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/sys/arch/arm/include/profile.h b/sys/arch/arm/include/profile.h new file mode 100644 index 00000000000..a15f022bff5 --- /dev/null +++ b/sys/arch/arm/include/profile.h @@ -0,0 +1,107 @@ +/* $OpenBSD: profile.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */ +/* $NetBSD: profile.h,v 1.5 2002/03/24 15:49:40 bjh21 Exp $ */ + +/* + * Copyright (c) 2001 Ben Harris + * Copyright (c) 1995-1996 Mark Brinicombe + * + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Mark Brinicombe. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#define _MCOUNT_DECL void _mcount + +/* + * Cannot implement mcount in C as GCC will trash the ip register when it + * pushes a trapframe. Pity we cannot insert assembly before the function + * prologue. + */ + +#ifdef __ELF__ +#define MCOUNT_ASM_NAME "__mcount" +#ifdef PIC +#define PLTSYM "(PLT)" +#endif +#else +#define MCOUNT_ASM_NAME "mcount" +#endif + +#ifndef PLTSYM +#define PLTSYM +#endif + +#define MCOUNT \ + __asm__(".text"); \ + __asm__(".align 0"); \ + __asm__(".type " MCOUNT_ASM_NAME ",%function"); \ + __asm__(".global " MCOUNT_ASM_NAME); \ + __asm__(MCOUNT_ASM_NAME ":"); \ + /* \ + * Preserve registers that are trashed during mcount \ + */ \ + __asm__("stmfd sp!, {r0-r3, ip, lr}"); \ + /* Check what mode we're in. EQ => 32, NE => 26 */ \ + __asm__("teq r0, r0"); \ + __asm__("teq pc, r15"); \ + /* \ + * find the return address for mcount, \ + * and the return address for mcount's caller. \ + * \ + * frompcindex = pc pushed by call into self. \ + */ \ + __asm__("moveq r0, ip"); \ + __asm__("bicne r0, ip, #0xfc000003"); \ + /* \ + * selfpc = pc pushed by mcount call \ + */ \ + __asm__("moveq r1, lr"); \ + __asm__("bicne r1, lr, #0xfc000003"); \ + /* \ + * Call the real mcount code \ + */ \ + __asm__("bl " __STRING(_mcount) PLTSYM); \ + /* \ + * Restore registers that were trashed during mcount \ + */ \ + __asm__("ldmfd sp!, {r0-r3, lr, pc}"); + +#ifdef _KERNEL +#ifdef __PROG26 +extern int int_off_save(void); +extern void int_restore(int); +#define MCOUNT_ENTER (s = int_off_save()) +#define MCOUNT_EXIT int_restore(s) +#else +#include <arm/cpufunc.h> +/* + * splhigh() and splx() are heavyweight, and call mcount(). Therefore + * we disabled interrupts (IRQ, but not FIQ) directly on the CPU. + * + * We're lucky that the CPSR and 's' both happen to be 'int's. + */ +#define MCOUNT_ENTER s = __set_cpsr_c(0x0080, 0x0080); /* kill IRQ */ +#define MCOUNT_EXIT __set_cpsr_c(0xffffffff, s); /* restore old value */ +#endif /* !acorn26 */ +#endif /* _KERNEL */ |