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malloc: Switch to the new malloc() implementation

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Add CONFIG_SYS_MALLOC_LEGACY to select the current allocator and adjust
the header-file and Makefile rule to use the new dlmalloc
implementation.

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
This commit is contained in:
Simon Glass
2025-11-28 16:37:04 -07:00
parent 13197ab962
commit 7eeb099ae1
3 changed files with 27 additions and 12 deletions
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16
Kconfig
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@@ -511,6 +511,22 @@ config SPL_SYS_MALLOC_SMALL
If unsure, say Y to minimize SPL code size.
config SYS_MALLOC_LEGACY
bool "Use legacy dlmalloc 2.6.6 instead of dlmalloc 2.8.6"
help
Select this option to use the older dlmalloc 2.6.6 implementation
instead of the newer 2.8.6 version. The legacy allocator uses a
simpler bin system, has larger code size in most cases and uses more
static data.
The legacy allocator may have slightly worse fragmentation behavior
for some workloads but has been well-tested over many years in U-Boot.
This option is provided for compatibility and testing. New boards
should use the default dlmalloc 2.8.6.
If unsure, say N to use the modern allocator.
config TOOLS_DEBUG
bool "Enable debug information for tools"
help