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userspace: properly namespace linker vars

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App shared memory defines a bunch of symbols in the
linker script. Namespace them properly as private
zephyr variables.

The variables which indicate the bounds of the entire
partition now end with "_part_start", "_part_size",
and "_part_end" to make them easy for scripts to
distinguish them from other generated symbols for
data/bss sizes.

Finally, the bss size is not rounded up, this was
causing unnecessary memory to be zeroed.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-03-04 17:57:06 -08:00 • committed by Andrew Boie
commit f084c38d44
2 changed files with 12 additions and 12 deletions
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8
include/app_memory/app_memdomain.h
View file

@ -62,10 +62,10 @@ struct z_app_region {
size_t bss_size;
};
#define Z_APP_START(id) data_smem_##id##_start
#define Z_APP_SIZE(id) data_smem_##id##_size
#define Z_APP_BSS_START(id) data_smem_##id##_bss_start
#define Z_APP_BSS_SIZE(id) data_smem_##id##_bss_size
#define Z_APP_START(id) z_data_smem_##id##_part_start
#define Z_APP_SIZE(id) z_data_smem_##id##_part_size
#define Z_APP_BSS_START(id) z_data_smem_##id##_bss_start
#define Z_APP_BSS_SIZE(id) z_data_smem_##id##_bss_size
/* If a partition is declared with K_APPMEM_PARTITION, but never has any
* data assigned to its contents, then no symbols with its prefix will end

16
scripts/gen_app_partitions.py
View file

@ -19,8 +19,8 @@ from elftools.elf.elffile import ELFFile
# initialization purpose when USERSPACE is enabled.
data_template = """
/* Auto generated code do not modify */
SMEM_PARTITION_ALIGN(data_smem_{0}_bss_end - data_smem_{0}_start);
data_smem_{0}_start = .;
SMEM_PARTITION_ALIGN(z_data_smem_{0}_bss_end - z_data_smem_{0}_part_start);
z_data_smem_{0}_part_start = .;
KEEP(*(data_smem_{0}_data))
"""
@ -29,7 +29,7 @@ library_data_template = """
"""
bss_template = """
data_smem_{0}_bss_start = .;
z_data_smem_{0}_bss_start = .;
KEEP(*(data_smem_{0}_bss))
"""
@ -38,9 +38,9 @@ library_bss_template = """
"""
footer_template = """
SMEM_PARTITION_ALIGN(data_smem_{0}_bss_end - data_smem_{0}_start);
data_smem_{0}_bss_end = .;
data_smem_{0}_end = .;
z_data_smem_{0}_bss_end = .;
SMEM_PARTITION_ALIGN(z_data_smem_{0}_bss_end - z_data_smem_{0}_part_start);
z_data_smem_{0}_part_end = .;
"""
linker_start_seq = """
@ -57,8 +57,8 @@ linker_end_seq = """
"""
size_cal_string = """
data_smem_{0}_size = data_smem_{0}_end - data_smem_{0}_start;
data_smem_{0}_bss_size = data_smem_{0}_bss_end - data_smem_{0}_bss_start;
z_data_smem_{0}_part_size = z_data_smem_{0}_part_end - z_data_smem_{0}_part_start;
z_data_smem_{0}_bss_size = z_data_smem_{0}_bss_end - z_data_smem_{0}_bss_start;
"""
section_regex = re.compile(r'data_smem_([A-Za-z0-9_]*)_(data|bss)')