From 5f1d477bb4d11eef7be502c79cb8852122ec38d1 Mon Sep 17 00:00:00 2001 From: Daniel Jacobowitz Date: Fri, 11 Apr 2008 14:21:43 +0000 Subject: [PATCH] 2008-04-11 Paul Brook Sandra Loosemore * sysdeps/arm/eabi/machine-gmon.h: New file. * sysdeps/arm/eabi/Versions: Add __gnu_mcount_nc. --- ChangeLog.arm | 6 +++ sysdeps/arm/eabi/Versions | 3 ++ sysdeps/arm/eabi/machine-gmon.h | 99 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 sysdeps/arm/eabi/machine-gmon.h diff --git a/ChangeLog.arm b/ChangeLog.arm index f23b2b9..2ed314c 100644 --- a/ChangeLog.arm +++ b/ChangeLog.arm @@ -1,3 +1,9 @@ +2008-04-11 Paul Brook + Sandra Loosemore + + * sysdeps/arm/eabi/machine-gmon.h: New file. + * sysdeps/arm/eabi/Versions: Add __gnu_mcount_nc. + 2007-12-21 Daniel Jacobowitz * sysdeps/unix/sysv/linux/arm/profil-counter.h: Use the i386 version. diff --git a/sysdeps/arm/eabi/Versions b/sysdeps/arm/eabi/Versions index ca51099..5f2af29 100644 --- a/sysdeps/arm/eabi/Versions +++ b/sysdeps/arm/eabi/Versions @@ -14,4 +14,7 @@ libc { # Helper routines __gnu_Unwind_Find_exidx; } + GLIBC_2.8 { + __gnu_mcount_nc; + } } diff --git a/sysdeps/arm/eabi/machine-gmon.h b/sysdeps/arm/eabi/machine-gmon.h new file mode 100644 index 0000000..189a9a3 --- /dev/null +++ b/sysdeps/arm/eabi/machine-gmon.h @@ -0,0 +1,99 @@ +/* Machine-dependent definitions for profiling support. ARM EABI version. + Copyright (C) 2008 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* GCC for the ARM cannot compile __builtin_return_address(N) for N != 0, + so we must use an assembly stub. */ + +#include +static void mcount_internal (u_long frompc, u_long selfpc) __attribute_used__; + +#define _MCOUNT_DECL(frompc, selfpc) \ +static void mcount_internal (u_long frompc, u_long selfpc) + +/* Use an assembly stub with a special ABI. The calling lr has been + pushed to the stack (which will be misaligned). We should preserve + all registers except ip and pop a word off the stack. + + NOTE: This assumes mcount_internal does not clobber any non-core + (coprocessor) registers. Currently this is true, but may require + additional attention in the future. + + The calling sequence looks something like: +func: + push {lr} + bl __gnu_mount_nc + + */ + + +#define MCOUNT \ +void __attribute__((__naked__)) __gnu_mcount_nc(void) \ +{ \ + asm ("push {r0, r1, r2, r3, lr}\n\t" \ + "bic r1, lr, #1\n\t" \ + "ldr r0, [sp, #20]\n\t" \ + "bl mcount_internal\n\t" \ + "pop {r0, r1, r2, r3, ip, lr}\n\t" \ + "bx ip"); \ +} \ +OLD_MCOUNT + +/* Provide old mcount for backwards compatibility. This requires + code be compiled with APCS frame pointers. */ + +#ifndef NO_UNDERSCORES +/* The asm symbols for C functions are `_function'. + The canonical name for the counter function is `mcount', no _. */ +void _mcount (void) asm ("mcount"); +#else +/* The canonical name for the function is `_mcount' in both C and asm, + but some old asm code might assume it's `mcount'. */ +void _mcount (void); +weak_alias (_mcount, mcount) +#endif + +#ifdef __thumb2__ + +#define OLD_MCOUNT \ +void __attribute__((__naked__)) _mcount (void) \ +{ \ + __asm__("push {r0, r1, r2, r3, fp, lr};" \ + "movs r0, fp;" \ + "ittt ne;" \ + "ldrne r0, [r0, #-4];" \ + "movsne r1, lr;" \ + "blne mcount_internal;" \ + "pop {r0, r1, r2, r3, fp, pc}"); \ +} + +#else + +#define OLD_MCOUNT \ +void __attribute__((__naked__)) _mcount (void) \ +{ \ + __asm__("stmdb sp!, {r0, r1, r2, r3, fp, lr};" \ + "movs fp, fp;" \ + "ldrne r0, [fp, #-4];" \ + "movnes r1, lr;" \ + "blne mcount_internal;" \ + "ldmia sp!, {r0, r1, r2, r3, fp, lr};" \ + "bx lr"); \ +} + +#endif -- 2.7.4