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| 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/bzero.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/bzero.S')
| -rw-r--r-- | libc/string/arm/bzero.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libc/string/arm/bzero.S b/libc/string/arm/bzero.S index ee49cf560..e576a12e9 100644 --- a/libc/string/arm/bzero.S +++ b/libc/string/arm/bzero.S @@ -38,6 +38,7 @@ */ #include <features.h> +#include <bits/arm_asm.h> #ifdef __UCLIBC_SUSV3_LEGACY__ @@ -46,10 +47,21 @@ .type bzero,%function .align 4 +#if defined(__thumb__) && !defined(__thumb2__) +.thumb_func +bzero: + push {r2, lr} + mov r2, r1 + mov r1, #0 + bl HIDDEN_JUMPTARGET(memset) + POP_RET +#else + bzero: mov r2, r1 mov r1, #0 b HIDDEN_JUMPTARGET(memset) +#endif .size bzero,.-bzero |