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arch/xtensa/esp32_esp32s3: prevent arch's libc in the userspace

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ESP32 and ESP32-S3 should use the ROM-defined versions of the libc
in flat build and, when building the protected mode, in the kernel.

The ROM-defined version of the libc functions can't be used in the
userspace, however, because it isn't allowed to access the memory
region in flash directly from the userspace. That being said,
`LIBC_PREVENT_STRING_KERNEL` should be selected to avoid building
any implementation of the libc, being the ROM-defined versions
linked instead.

NuttX's software implemented version of the libc will be built in
the userspace. Also, the assembly-defined version of some of the
libc functions (`XTENSA_xxx`) may also be selected to be used in
the userspace.
This commit is contained in:
Tiago Medicci Serrano 2023-05-03 15:30:20 -03:00 committed by Xiang Xiao
parent 58e97e521c
commit 496a77653a
1 changed files with 2 additions and 0 deletions
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arch/xtensa/Kconfig
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@ -21,6 +21,7 @@ config ARCH_CHIP_ESP32
select ARCH_HAVE_TESTSET
select ARCH_HAVE_TEXT_HEAP
select ARCH_VECNOTIRQ
select LIBC_PREVENT_STRING_KERNEL
select LIBC_ARCH_ATOMIC
select LIBC_ARCH_MEMCPY if BUILD_FLAT
select LIBC_ARCH_MEMCHR if BUILD_FLAT
@ -83,6 +84,7 @@ config ARCH_CHIP_ESP32S3
select ARCH_HAVE_RESET
select ARCH_HAVE_TESTSET
select ARCH_VECNOTIRQ
select LIBC_PREVENT_STRING_KERNEL
select LIBC_ARCH_MEMCPY if BUILD_FLAT
select LIBC_ARCH_MEMCHR if BUILD_FLAT
select LIBC_ARCH_MEMCMP if BUILD_FLAT