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feat(esp_libc): make picolibc default libc

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This commit is contained in:
Alexey Lapshin
2025-12-06 00:08:35 +07:00
parent d9f98b8ef6
commit ad7f4b9670
86 changed files with 1077 additions and 423 deletions
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components/esp_system/ld/esp32c61/sections.ld.in
+37 -16
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@@ -217,6 +217,9 @@ SECTIONS
mapping[flash_rodata]
#if CONFIG_LIBC_PICOLIBC
*(.got .got.plt) /* TODO: GCC-439 */
#endif
*(.irom1.text) /* catch stray ICACHE_RODATA_ATTR */
*(.gnu.linkonce.r.*)
*(.rodata1)
@@ -228,6 +231,7 @@ SECTIONS
* Excluding crtbegin.o/crtend.o since IDF doesn't use the toolchain crt.
*/
ALIGNED_SYMBOL(4, __preinit_array_start)
ALIGNED_SYMBOL(4, __bothinit_array_start)
KEEP (*(.preinit_array))
__preinit_array_end = ABSOLUTE(.);
@@ -235,6 +239,7 @@ SECTIONS
KEEP (*(SORT_BY_INIT_PRIORITY(EXCLUDE_FILE (*crtend.* *crtbegin.*) .init_array.*)))
KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .init_array))
__init_array_end = ABSOLUTE(.);
__bothinit_array_end = ABSOLUTE(.);
/* Addresses of memory regions reserved via SOC_RESERVE_MEMORY_REGION() */
ALIGNED_SYMBOL(4, soc_reserved_memory_region_start)
@@ -284,32 +289,48 @@ SECTIONS
.flash.tdata :
{
/* Keep tdata and tbss sections contiguous (no gaps between them).
* The TLS runtime code calculates offsets assuming these sections are
* adjacent. Gaps would cause incorrect address calculations, leading
* to accessing wrong memory.
*
* Storing all TLS structures in flash increases binary size, but avoids
* runtime issues and reduces TLS allocations on the stack.
*/
/* tdata sections */
_thread_local_data_start = ABSOLUTE(.);
#if CONFIG_LIBC_PICOLIBC
_picolibc_reent_stub_start = ABSOLUTE(.);
KEEP(*(.tdata.errno))
#if CONFIG_LIBC_PICOLIBC_NEWLIB_COMPATIBILITY
/* Reproduce the public fields from struct _reent. */
KEEP(*(.tdata.tls_stdin))
KEEP(*(.tdata.tls_stdout))
KEEP(*(.tdata.tls_stderr))
#endif // CONFIG_LIBC_PICOLIBC_NEWLIB_COMPATIBILITY
_picolibc_reent_stub_end = ABSOLUTE(.);
#endif // CONFIG_LIBC_PICOLIBC
*(.tdata .tdata.* .gnu.linkonce.td.*)
_thread_local_data_end = ABSOLUTE(.);
. = ALIGN(ALIGNOF(.flash.tbss));
/* tbss sections */
_thread_local_bss_start = ABSOLUTE(.);
*(.tbss .tbss.* .gnu.linkonce.tb.*)
*(.tcommon .tcommon.*)
_thread_local_bss_end = ABSOLUTE(.);
. = ALIGN(ALIGNOF(.flash.rodata_noload));
#if CONFIG_SPIRAM_RODATA && CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION
/* Align the end of flash rodata region as per PMP granularity to allow using the
* page alignment gap created while mapping the flash region into the PSRAM memory.
*/
. = ALIGN(_esp_pmp_align_size);
#endif // CONFIG_SPIRAM_RODATA && CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION
_thread_local_data_end = ABSOLUTE(.);
} > default_rodata_seg
ASSERT_SECTIONS_GAP(.flash.tdata, .flash.tbss)
.flash.tbss (NOLOAD) :
{
_thread_local_bss_start = ABSOLUTE(.);
*(.tbss .tbss.* .gnu.linkonce.tb.*)
*(.tcommon .tcommon.*)
_thread_local_bss_end = ABSOLUTE(.);
} > default_rodata_seg
ASSERT_SECTIONS_GAP(.flash.tdata, .flash.rodata_noload)
ASSERT(_thread_local_data_end == _thread_local_bss_start,
"tdata and tbss must be contiguous.")
ASSERT_PICOLIBC_REENT_STUB()
/**
* This section contains all the rodata that is not used
@@ -322,7 +343,7 @@ SECTIONS
* driver to maintain the virtual address.
* NOLOAD rodata may not be included in this section.
*/
_rodata_reserved_end = ADDR(.flash.tbss);
_rodata_reserved_end = .;
mapping[rodata_noload]
} > default_rodata_seg