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https://github.com/Rockbox/rockbox.git
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2f2b90535a
The ARM assembly versions of memcpy and memmove try to directly modify the PC based on the number of bytes to be copied as an "optimization"; but this only works if instructions are guaranteed to be 4 bytes wide. This trick is completely broken on Cortex-M, since an instruction can be 2-4 bytes wide: for example a memcpy of 4 bytes ends up storing 32 bytes worth of garbage to the target address! Use the C memcpy/memmove implementations for Cortex-M instead; fixing the ASM version is more trouble than it's worth. Change-Id: I695587fd585ec25ef276f2dbc61e2290b7015e13
68 lines
1.4 KiB
Text
68 lines
1.4 KiB
Text
#if defined(CPU_ARM)
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#if defined(CPU_ARM_CLASSIC)
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arm/ffs.S
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#endif
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arm/memset16.S
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#elif defined(CPU_MIPS)
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mips/ffs.S
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memset16.c
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#elif defined(CPU_COLDFIRE)
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m68k/ffs.S
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m68k/memset16.S
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#else
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ffs.c
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memset16.c
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#endif
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#if (CONFIG_PLATFORM & PLATFORM_NATIVE) || defined(HAVE_ROCKBOX_C_LIBRARY)
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#if defined(CPU_ARM_CLASSIC)
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arm/memcpy.S
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arm/memmove.S
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arm/memset.S
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strlen.c
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#elif defined(CPU_ARM_MICRO)
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memcpy.c
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mempcpy.c
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memmove.c
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arm/memset.S
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strlen.c
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#elif defined(CPU_MIPS)
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mips/memcpy.S
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memmove.c
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mips/memset.S
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strlen.c
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#elif defined(CPU_COLDFIRE)
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m68k/memcpy.S
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m68k/memmove.S
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m68k/memset.S
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m68k/strlen.S
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#else
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memcpy.c
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mempcpy.c
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memmove.c
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memset.c
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strlen.c
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#endif
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#endif
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#if defined(WIN32) || defined(APPLICATION)
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mempcpy.c
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#endif
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#if (defined(SANSA_E200) || defined(GIGABEAT_F) || defined(GIGABEAT_S) || \
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defined(CREATIVE_ZVx) || defined(SANSA_CONNECT) || defined(SANSA_FUZEPLUS) || \
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defined(COWON_D2) || defined(MINI2440) || defined(SAMSUNG_YPR0) || \
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defined(SAMSUNG_YPR1) || defined(DX50) || defined(DX90) || (defined(MROBE_500) && !defined(LCD_USE_DMA)) || \
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defined(CREATIVE_ZEN) || defined(CREATIVE_ZENXFI) || defined(SONY_NWZ_LINUX) || defined(HIBY_LINUX) || \
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defined(FIIO_M3K_LINUX)) && \
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!defined(SIMULATOR)
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#if LCD_DEPTH >= 24
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lcd-as-memframe-24bit.c
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#else
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#if defined(CPU_ARM)
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arm/lcd-as-memframe.S
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#else
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lcd-as-memframe.c
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#endif /* CPU_ARM */
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#endif /* LCD_DEPTH */
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#endif
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