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Diffstat (limited to 'libgloss/rl78/gcrt0.S')
| -rw-r--r-- | libgloss/rl78/gcrt0.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/libgloss/rl78/gcrt0.S b/libgloss/rl78/gcrt0.S new file mode 100644 index 000000000..a75614f89 --- /dev/null +++ b/libgloss/rl78/gcrt0.S @@ -0,0 +1,58 @@ +/* Copyright (c) 2011 Red Hat Incorporated. + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + 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. + + The name of Red Hat Incorporated may not be used to endorse + or promote products derived from this software without specific + prior written permission. + + This software is provided by the copyright holders 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 Red Hat + incorporated 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 PROFILE_SUPPORT 1 + +#include "crt0.S" + + .global __mcount + .type __mcount, @function +__mcount: + ;; When a function is compiled for profiling, gcc creates code + ;; like this at the start of each profiled function: + ;; + ;; .global <func_name> + ;; <func_name>: + ;; bsr __mcount + ;; <...function's prologue...> + ;; <...function's body...> + ;; + ;; We must save all of the argument registers, extract the + ;; address of <func_name>, call _mcount_internal to do the + ;; real work and then restore the argument registers before + ;; returning. + + movw ax, [sp] + push ax + call !!__mcount_internal + pop ax + ret + + .size __mcount, . - __mcount |