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Unlike other functions __aeabi_read_tp function must preserve r1-r3. The

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currently generated code clobbers r3. Fix this by loading ARM_TP_ADDRESS
using inline assembly.

Approved by:	imp (mentor)
This commit is contained in:
Andrew Turner 2012-04-08 04:36:27 +00:00
parent 72c3f707a4
commit fcb6e7147b
1 changed files with 5 additions and 2 deletions
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7
lib/libc/arm/gen/__aeabi_read_tp.c
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@ -1,5 +1,6 @@
/*-
* Copyright (c) 2012 Oleksandr Tymoshenko
* Copyright (c) 2012 Andrew Turner
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -36,7 +37,9 @@ __FBSDID("$FreeBSD$");
void *
__aeabi_read_tp()
{
void **_tp = (void **)ARM_TP_ADDRESS;
void *_tp;
return (*_tp);
asm("ldr %0, [%1]\n" : "=r"(_tp) : "r"(ARM_TP_ADDRESS));
return _tp;
}