xtensa: build: add support for build with upstream llvm clang with binutils backend#108765

Draft

lgirdwood wants to merge 47 commits into

zephyrproject-rtos:mainfrom

lgirdwood:clang-dev

Commits on Jul 18, 2026

cmake: toolchain: llvm: Xtensa target triple and mcpu mapping
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cmake: toolchain: llvm: compiler-rt linker override and per-core SDK ld for Xtensa
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cmake: linker: Adapt linker executables for LLVM/LLD and GCC driver overrides
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cmake: linker+toolchain: Configure LLD for Xtensa and disable FLIX by default
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cmake: modules: Configure LLEXT compiler and package stripping flags for ARM
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cmake: toolchain: llvm: LLEXT shared library link rules for Xtensa
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cmake: toolchain: llvm: add LLEXT link wrapper and shared linker script
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arch: xtensa: cmake: add -mtext-section-literals compiler flag
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arch: xtensa: cmake: add fallback HAL include directory lookup
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arch: xtensa: asm: replace rsr.eps/epc pseudo-ops and add .literal_position for IAS
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arch: xtensa: include: add core-isa.h wrapper to handle __XCC__ guard
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arch: xtensa: asm: fix assembly compatibility for Clang IAS
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arch: xtensa: toolchain: rewrite vector generator offsets as relative for LLD
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arch: xtensa: fix context switch stack offset for Clang windowed ABI
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arch: xtensa: provide __popcountsi2 with text-section-literals

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subsys: llext: fix llext_loaded_sect_ptr for ET_REL sections with sh_addr=0
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subsys: llext: fix PLT relocation address calculation for ET_REL sections
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subsys: llext: fix symbol copy addresses and section overlap check for ET_REL
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arch: xtensa: llext: fix local relocations for ET_REL and global symbols
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arch: xtensa: crt1: enable CPENABLE at early boot for all coprocessors
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arch: xtensa: asm2: Enable all CPs in assembly before C exception handler
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arch: xtensa: vector_handlers: Enable all CPs before print_fatal_exception
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arch: xtensa: hifi: macro-free HiFi3 save/restore for cavs2.5 (TGL)

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lib: libc: minimal: disable Clang loop vectorization in memcpy/memset
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boards: mediatek: Update ADSP devicetree and DMA bindings for Clang compatibility
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soc: intel_adsp: boot: Explicitly mark boot assembly section as allocatable
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soc: intel_adsp: Configure cached/uncached mappings and discard stack notes
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soc: intel_adsp: Map IMR boot loader stack as shared region
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soc: intel_adsp: Fix missing active cpus array on UP configurations
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soc: xtensa: Finalize LLD linker script fixes for Intel and NXP
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soc: intel_adsp: ace: Add MMU mappings for bootloader IMR regions
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soc: intel_adsp: Fix heap boundary calculation in linker scripts
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soc: intel_adsp: lazy debug window init and word-aligned boot memcpy
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drivers: dma: intel_adsp_gpdma: use sys_write16 for 16-bit ownership register
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drivers: interrupt_controller: intc_dw_ace: Fix compiler bug in irq loop
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soc: intel: adsp: cavs: add HiFi3 capability and fix heap boundary

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claude
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drivers: interrupt_controller: intc_dw_ace: use arch_num_cpus instead of CONFIG_MP_MAX_NUM_CPUS
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soc: cdns: dc233c: Configure linker cached/uncached macro mappings for LLD
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soc: xtensa: Update linker scripts for LLD compatibility
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xtensa: adsp: record fatal exception breadcrumbs in HP-SRAM window0
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xtensa: adsp: record triple fault breadcrumbs in HP-SRAM window0
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xtensa: adsp: Support selecting diagnostic data in fatal breadcrumbs
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xtensa: adsp: breadcrumb: Guard instruction fetch against unmapped PC
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arch: xtensa: debug: move double exception breadcrumbs to win0[4-6]
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arch: xtensa: debug: overwrite ROM boot status with crash PC if win0[0] < 0xa0000000
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arch: xtensa: Kconfig: enable XTENSA_ADSP_FATAL_BREADCRUMB by default if TRIPLE_FAULT_BREADCRUMB is enabled
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Commits on Jul 19, 2026

Revert "arch: xtensa: asm: replace rsr.eps/epc pseudo-ops and add .literal_position for IAS"
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