diff options
| author | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-03-26 13:40:36 +0000 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-03-26 13:40:36 +0000 |
| commit | efce79f09ae6daa77cd322df0d532beec3f445f5 (patch) | |
| tree | ae936850c5671b8bea0abf0d33bf2196f7abc796 /libc/string/arm/bcopy.S | |
| parent | 17e961d9c708ab202760ce830f8efe73e91bb129 (diff) | |
Paul Brook writes:
The attached patch adds support for compiling arm uClibc as pure Thumb code.
This is needed because some recent ARM codes do not implement traditional ARM
mode. Specifically:
* Cortex-M1 - An extremely minimal FPGA based core that only implements
Thumb-1 (aka ARMv6-M).
* Cortex-M3 - A Thumb-2 only ARMv7-M core.
Most of uClibc already builds in Thumb mode, all that is left are a handful of
assembly bits.
Tested on arm-uclinuxeabi.
Diffstat (limited to 'libc/string/arm/bcopy.S')
| -rw-r--r-- | libc/string/arm/bcopy.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libc/string/arm/bcopy.S b/libc/string/arm/bcopy.S index db3c9e6c1..2d6e90d13 100644 --- a/libc/string/arm/bcopy.S +++ b/libc/string/arm/bcopy.S @@ -40,6 +40,7 @@ /* bcopy = memcpy/memmove with arguments reversed. */ #include <features.h> +#include <bits/arm_asm.h> #ifdef __UCLIBC_SUSV3_LEGACY__ @@ -48,12 +49,23 @@ .type bcopy,%function .align 4 +#if defined(__thumb__) && !defined(__thumb2__) +.thumb_func +bcopy: + push {r2, lr} + mov ip, r0 + mov r0, r1 + mov r1, ip + bl _memcpy + POP_RET +#else bcopy: /* switch the source and destination registers */ eor r0, r1, r0 eor r1, r0, r1 eor r0, r1, r0 b _memcpy /* (PLT) */ +#endif .size bcopy,.-bcopy |