fix stack alignment to 8 bytes for ARM AAPCS compliance

[avm1234567]

Summary

Fixes stack alignment issue for STM32 targets to comply with ARM AAPCS (Issue #7527).

The .stack section in STM32 linker scripts was incorrectly aligned to 4 bytes. According to the ARM Procedure Call
Standard , the stack pointer (SP) must be 8-byte aligned at public function boundaries.

This PR changes ALIGN(4) to ALIGN(8) in the .stack section for all affected STM32 BSP linker scripts and templates.

Changes

• Changed ALIGN(4) to ALIGN(8) exclusively in the .stack section for exactly 110 STM32 linker scripts (12 templates,
  98 boards).
• Preserves all board-specific ROM/RAM memory layouts and origins

Files Changed

Templates (12):

• bsp/stm32/libraries/templates/stm32f0xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f10x/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f2xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f3xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f4xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f7xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32h7xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32l1xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32l4xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32l5xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32mp1xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32wbxx/board/linker_scripts/link.lds

BSP Boards (98):

All 98 remaining link.lds files across bsp/stm32/stm32*/board/linker_scripts/link.lds that contained ALIGN(4) in
the .stack section.

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[github-actions]

👋 感谢您对 RT-Thread 的贡献！Thank you for your contribution to RT-Thread!

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[github-actions]

📌 Code Review Assignment

🏷️ Tag: bsp_stm32

Reviewers: @Liang1795 @hamburger-os @wdfk-prog

Changed Files (Click to expand)

• bsp/stm32/libraries/templates/stm32f0xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f10x/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f2xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f3xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f4xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32f7xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32h7xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32l1xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32l4xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32l5xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32mp1xx/board/linker_scripts/link.lds
• bsp/stm32/libraries/templates/stm32wbxx/board/linker_scripts/link.lds
• bsp/stm32/stm32f072-st-nucleo/board/linker_scripts/link.lds
• bsp/stm32/stm32f091-st-nucleo/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-100ask-mini/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-100ask-pro/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-atk-nano/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-atk-warshipv3/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-blue-pill/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-dofly-M3S/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-dofly-lyc8/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-fire-arbitrary/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-gizwits-gokitv21/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-hw100k-ibox/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-keysking-learning/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-onenet-nbiot/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-yf-ufun/board/linker_scripts/link.lds
• bsp/stm32/stm32f103-ys-f1pro/board/linker_scripts/link.lds
• bsp/stm32/stm32f107-uc-eval/board/linker_scripts/link.lds
• bsp/stm32/stm32f207-st-nucleo/board/linker_scripts/link.lds

🏷️ Tag: bsp_stm32f103-blue-pill

Reviewers: @Liang1795

Changed Files (Click to expand)

• bsp/stm32/stm32f103-blue-pill/board/linker_scripts/link.lds

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📊 Current Review Status (Last Updated: 2026-09-27 20:57 CST)

• ⌛ @Liang1795 Pending Review
• ⌛ @hamburger-os Pending Review
• ⌛ @wdfk-prog Pending Review

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[wdfk-prog]

LGTM

[github-actions]

MemBrowse Memory Report

stm32f407-rt-spark

• RAM1: .stack +4 B (+0.1%, 5,476 B / 131,072 B, total: 4% used)

stm32l475-atk-pandora-llvm

• RAM1: .stack +4 B (+0.1%, 4,244 B / 98,304 B, total: 4% used)