chao an
3d57055057
libc/arm: add support of PACBTI
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Reference:
https://developer.arm.com/documentation/100748/0617/Security-features-supported-in-Arm-Compiler-for-Embedded/PACBTI-M-extension-mitigations-against-ROP-and-JOP-style-attacks
https://developer.arm.com/documentation/101754/0619/armclang-Reference/armclang-Command-line-Options/-mbranch-protection
Signed-off-by: chao an <anchao@xiaomi.com>
2023-11-30 01:12:24 -08:00
yangdongdong
1956385a7d
libs/libc: Breakdown LIBC_BUILD_STRING into specific string operations macro.
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Provide a way to only customize specific string operations,
such as for memcpy with the DMA capability by ROM.
Signed-off-by: yangdongdong <yangdongdong@xiaomi.com>
2023-08-29 22:55:18 +08:00
zhangyuan21
a10cc49e67
Revert "newlib: libc: memcpy M-profile PACBTI-enablement"
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This reverts commit 9fa097ab69
2023-08-03 07:03:39 -07:00
zhangyuan21
3625385541
arch_memcpy: Optimize arch memcpy for armv7-m and armv8-m
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Use ldm and stm instruction to optimize performance when
both src and dst are 32-bit aligned.
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
2023-08-02 16:52:25 +02:00
Tiago Medicci Serrano
58e97e521c
libc/string: prevent libc in the kernel/userspace optionally
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Add the `LIBC_PREVENT_STRING_KERNEL` and `LIBC_PREVENT_STRING_USER`
that are meant to be selected by the chip if no libc implementation
is going to be built. If selected, neither NuttX's software version
of the libc nor any architecture-specific implementation will be
built in the kernel or in the userspace, respectively. In this
case, the linker may provide a ROM-defined version of the libc
functions instead.
2023-05-17 13:58:48 +08:00
chao an
d6747dd6ad
libc/armv8-m: fix build break if MVE is disabled
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machine/arm/armv8-m/gnu/arch_memcpy.S: Assembler messages:
machine/arm/armv8-m/gnu/arch_memcpy.S:105: Error: bad instruction `prologue push_ip=HAVE_PAC_LEAF'
machine/arm/armv8-m/gnu/arch_memcpy.S:121: Error: bad instruction `epilogue push_ip=HAVE_PAC_LEAF'
make[1]: *** [Makefile:143: bin/arch_memcpy.o] Error
Signed-off-by: chao an <anchao@xiaomi.com>
2023-05-05 08:07:08 +02:00
chao an
9fa097ab69
newlib: libc: memcpy M-profile PACBTI-enablement
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Add function prologue/epilogue to conditionally add BTI landing pads
and/or PAC code generation & authentication instructions depending on
compilation flags.
Signed-off-by: chao an <anchao@xiaomi.com>
2023-04-28 09:51:52 +08:00
zhangyuan21
650f17169a
libc: add armv7-a armv7-m armv8-m libc function
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Porting memory and string optimize functions from newlib and bionic
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
2023-01-10 11:31:26 +08:00
