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3 commits

Author SHA1 Message Date
yinshengkai
54040c6888 libs/libc/machine/arm: add Cortex-M0/M23 support to arch_mcount
Add support for ARMv6-M and ARMv8-M Baseline architectures
(Cortex-M0/M0+/M23) in the mcount profiling function. These cores
only support limited Thumb-1 instruction set and require different
assembly instructions compared to ARMv7-M and higher.

Changes:
- Use MOVS+BICS instead of BIC for bit clearing on M0/M23
- Separate register restore for limited push/pop instructions
- Use BX instead of direct POP to PC on M0/M23

Signed-off-by: yinshengkai <yinshengkai@bytedance.com>
2026-02-04 03:03:45 +08:00
yinshengkai
156ef05205 libc/mcount: compatible with armv6m mcount implementation
mcount.S: Assembler messages:
mcount.S:33: Error: cannot honor width suffix -- `bic r1,lr,#1'
mcount.S:35: Error: cannot honor width suffix -- `bic r0,r0,#1'
mcount.S:37: Error: cannot honor width suffix -- `pop {r0,r1,r2,r3,ip,lr}

Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
2025-07-10 18:06:03 +08:00
Xiang Xiao
5758364f10 libc/machine/arm: Move all source files out of gnu folder
and unify the file prefix to arch_xxx.c

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2025-06-30 09:56:27 +08:00
Renamed from libs/libc/machine/arm/gnu/mcount.S (Browse further)