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esp-idf/components/esp32s2/ld/esp32s2.project.ld.in
Ivan Grokhotkov 0535195983 freertos: fix TLS run-time address calculation 
Since dd849ffc, _rodata_start label has been moved to a different
linker output section from where the TLS templates (.tdata, .tbss)
are located. Since link-time addresses of thread-local variables are
calculated relative to the section start address, this resulted in
incorrect calculation of THREADPTR/$tp registers.

Fix by introducing new linker label, _flash_rodata_start, which points
to the .flash.rodata output section where TLS variables are located,
and use it when calculating THREADPTR/$tp.

Also remove the hardcoded rodata section alignment for Xtensa targets.
Alignment of rodata can be affected by the user application, which is
the issue dd849ffc was fixing. To accommodate any possible alignment,
save it in a linker label (_flash_rodata_align) and then use when
calculating THREADPTR. Note that this is not required on RISC-V, since
this target doesn't use TPOFF.
2021-04-21 13:45:21 +02:00

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/* Default entry point: */
ENTRY(call_start_cpu0);
SECTIONS
{
/* RTC fast memory holds RTC wake stub code,
including from any source file named rtc_wake_stub*.c
*/
.rtc.text :
{
_rtc_text_start = ABSOLUTE(.);
. = ALIGN(4);
_rtc_code_start = .;
mapping[rtc_text]
*rtc_wake_stub*.*(.literal .text .literal.* .text.*)
_rtc_code_end = .;
/* possibly align + add 16B for CPU dummy speculative instr. fetch */
. = ((_rtc_code_end - _rtc_code_start) == 0) ? ALIGN(0) : ALIGN(4) + 16;
_rtc_text_end = ABSOLUTE(.);
} > rtc_iram_seg
/*
This section is required to skip rtc.text area because rtc_iram_seg and
rtc_data_seg are reflect the same address space on different buses.
*/
.rtc.dummy :
{
_rtc_dummy_start = ABSOLUTE(.);
_rtc_fast_start = ABSOLUTE(.);
. = SIZEOF(.rtc.text);
_rtc_dummy_end = ABSOLUTE(.);
} > rtc_data_seg
/* This section located in RTC FAST Memory area.
It holds data marked with RTC_FAST_ATTR attribute.
See the file "esp_attr.h" for more information.
*/
.rtc.force_fast :
{
. = ALIGN(4);
_rtc_force_fast_start = ABSOLUTE(.);
mapping[rtc_force_fast]
*(.rtc.force_fast .rtc.force_fast.*)
. = ALIGN(4) ;
_rtc_force_fast_end = ABSOLUTE(.);
} > rtc_data_seg
/* RTC data section holds RTC wake stub
data/rodata, including from any source file
named rtc_wake_stub*.c and the data marked with
RTC_DATA_ATTR, RTC_RODATA_ATTR attributes.
The memory location of the data is dependent on
CONFIG_ESP32S2_RTCDATA_IN_FAST_MEM option.
*/
.rtc.data :
{
_rtc_data_start = ABSOLUTE(.);
mapping[rtc_data]
*rtc_wake_stub*.*(.data .rodata .data.* .rodata.* .bss .bss.*)
_rtc_data_end = ABSOLUTE(.);
} > rtc_data_location
/* RTC bss, from any source file named rtc_wake_stub*.c */
.rtc.bss (NOLOAD) :
{
_rtc_bss_start = ABSOLUTE(.);
*rtc_wake_stub*.*(.bss .bss.*)
*rtc_wake_stub*.*(COMMON)
mapping[rtc_bss]
_rtc_bss_end = ABSOLUTE(.);
} > rtc_data_location
/* This section holds data that should not be initialized at power up
and will be retained during deep sleep.
User data marked with RTC_NOINIT_ATTR will be placed
into this section. See the file "esp_attr.h" for more information.
The memory location of the data is dependent on
CONFIG_ESP32S2_RTCDATA_IN_FAST_MEM option.
*/
.rtc_noinit (NOLOAD):
{
. = ALIGN(4);
_rtc_noinit_start = ABSOLUTE(.);
*(.rtc_noinit .rtc_noinit.*)
. = ALIGN(4) ;
_rtc_noinit_end = ABSOLUTE(.);
} > rtc_data_location
/* This section located in RTC SLOW Memory area.
It holds data marked with RTC_SLOW_ATTR attribute.
See the file "esp_attr.h" for more information.
*/
.rtc.force_slow :
{
. = ALIGN(4);
_rtc_force_slow_start = ABSOLUTE(.);
*(.rtc.force_slow .rtc.force_slow.*)
. = ALIGN(4) ;
_rtc_force_slow_end = ABSOLUTE(.);
} > rtc_slow_seg
/* Get size of rtc slow data based on rtc_data_location alias */
_rtc_slow_length = (ORIGIN(rtc_slow_seg) == ORIGIN(rtc_data_location))
? (_rtc_force_slow_end - _rtc_data_start)
: (_rtc_force_slow_end - _rtc_force_slow_start);
_rtc_fast_length = (ORIGIN(rtc_slow_seg) == ORIGIN(rtc_data_location))
? (_rtc_force_fast_end - _rtc_fast_start)
: (_rtc_noinit_end - _rtc_fast_start);
ASSERT((_rtc_slow_length <= LENGTH(rtc_slow_seg)),
"RTC_SLOW segment data does not fit.")
ASSERT((_rtc_fast_length <= LENGTH(rtc_data_seg)),
"RTC_FAST segment data does not fit.")
/* Send .iram0 code to iram */
.iram0.vectors :
{
_iram_start = ABSOLUTE(.);
/* Vectors go to IRAM */
_vector_table = ABSOLUTE(.);
/* Vectors according to builds/RF-2015.2-win32/esp108_v1_2_s5_512int_2/config.html */
. = 0x0;
KEEP(*(.WindowVectors.text));
. = 0x180;
KEEP(*(.Level2InterruptVector.text));
. = 0x1c0;
KEEP(*(.Level3InterruptVector.text));
. = 0x200;
KEEP(*(.Level4InterruptVector.text));
. = 0x240;
KEEP(*(.Level5InterruptVector.text));
. = 0x280;
KEEP(*(.DebugExceptionVector.text));
. = 0x2c0;
KEEP(*(.NMIExceptionVector.text));
. = 0x300;
KEEP(*(.KernelExceptionVector.text));
. = 0x340;
KEEP(*(.UserExceptionVector.text));
. = 0x3C0;
KEEP(*(.DoubleExceptionVector.text));
. = 0x400;
_invalid_pc_placeholder = ABSOLUTE(.);
*(.*Vector.literal)
*(.UserEnter.literal);
*(.UserEnter.text);
. = ALIGN (16);
*(.entry.text)
*(.init.literal)
*(.init)
_init_end = ABSOLUTE(.);
} > iram0_0_seg
.iram0.text :
{
/* Code marked as runnning out of IRAM */
_iram_text_start = ABSOLUTE(.);
mapping[iram0_text]
/* added to maintain compability */
_coredump_iram_start = 0;
_coredump_iram_end = 0;
/* align + add 16B for CPU dummy speculative instr. fetch */
. = ALIGN(4) + 16;
/* iram_end_test section exists for use by memprot unit tests only */
*(.iram_end_test)
_iram_text_end = ABSOLUTE(.);
_iram_end = ABSOLUTE(.);
} > iram0_0_seg
.dram0_reserved_for_iram (NOLOAD):
{
. = ORIGIN(dram0_0_seg) + _iram_end - _iram_start;
} > dram0_0_seg
.dram0.data :
{
_data_start = ABSOLUTE(.);
*(.gnu.linkonce.d.*)
*(.data1)
*(.sdata)
*(.sdata.*)
*(.gnu.linkonce.s.*)
*(.sdata2)
*(.sdata2.*)
*(.gnu.linkonce.s2.*)
*(.jcr)
_esp_system_init_fn_array_start = ABSOLUTE(.);
KEEP (*(SORT(.esp_system_init_fn) SORT(.esp_system_init_fn.*)))
_esp_system_init_fn_array_end = ABSOLUTE(.);
mapping[dram0_data]
_data_end = ABSOLUTE(.);
. = ALIGN(4);
} > dram0_0_seg
/*This section holds data that should not be initialized at power up.
The section located in Internal SRAM memory region. The macro _NOINIT
can be used as attribute to place data into this section.
See the esp_attr.h file for more information.
*/
.noinit (NOLOAD):
{
. = ALIGN(4);
_noinit_start = ABSOLUTE(.);
*(.noinit .noinit.*)
. = ALIGN(4) ;
_noinit_end = ABSOLUTE(.);
} > dram0_0_seg
/* Shared RAM */
.dram0.bss (NOLOAD) :
{
. = ALIGN (8);
_bss_start = ABSOLUTE(.);
*(.ext_ram.bss*)
mapping[dram0_bss]
*(.dynsbss)
*(.sbss)
*(.sbss.*)
*(.gnu.linkonce.sb.*)
*(.scommon)
*(.sbss2)
*(.sbss2.*)
*(.gnu.linkonce.sb2.*)
*(.dynbss)
*(.share.mem)
*(.gnu.linkonce.b.*)
. = ALIGN (8);
_bss_end = ABSOLUTE(.);
} > dram0_0_seg
.flash.appdesc : ALIGN(0x10)
{
_rodata_reserved_start = ABSOLUTE(.);
_rodata_start = ABSOLUTE(.);
*(.rodata_desc .rodata_desc.*) /* Should be the first. App version info. DO NOT PUT ANYTHING BEFORE IT! */
*(.rodata_custom_desc .rodata_custom_desc.*) /* Should be the second. Custom app version info. DO NOT PUT ANYTHING BEFORE IT! */
/* Create an empty gap within this section. Thanks to this, the end of this
* section will match .flah.rodata's begin address. Thus, both sections
* will be merged when creating the final bin image. */
. = ALIGN(ALIGNOF(.flash.rodata));
} >default_rodata_seg
.flash.rodata : ALIGN(0x10)
{
_flash_rodata_start = ABSOLUTE(.);
mapping[flash_rodata]
*(.irom1.text) /* catch stray ICACHE_RODATA_ATTR */
*(.gnu.linkonce.r.*)
*(.rodata1)
__XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
*(.xt_except_table)
*(.gcc_except_table .gcc_except_table.*)
*(.gnu.linkonce.e.*)
*(.gnu.version_r)
. = (. + 3) & ~ 3;
__eh_frame = ABSOLUTE(.);
KEEP(*(.eh_frame))
. = (. + 7) & ~ 3;
/* C++ constructor and destructor tables
Make a point of not including anything from crtbegin.o or crtend.o, as IDF doesn't use toolchain crt
*/
__init_array_start = ABSOLUTE(.);
KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .ctors SORT(.ctors.*)))
__init_array_end = ABSOLUTE(.);
KEEP (*crtbegin.*(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.*) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
/* C++ exception handlers table: */
__XT_EXCEPTION_DESCS_ = ABSOLUTE(.);
*(.xt_except_desc)
*(.gnu.linkonce.h.*)
__XT_EXCEPTION_DESCS_END__ = ABSOLUTE(.);
*(.xt_except_desc_end)
*(.dynamic)
*(.gnu.version_d)
/* Addresses of memory regions reserved via
SOC_RESERVE_MEMORY_REGION() */
soc_reserved_memory_region_start = ABSOLUTE(.);
KEEP (*(.reserved_memory_address))
soc_reserved_memory_region_end = ABSOLUTE(.);
_rodata_end = ABSOLUTE(.);
/* Literals are also RO data. */
_lit4_start = ABSOLUTE(.);
*(*.lit4)
*(.lit4.*)
*(.gnu.linkonce.lit4.*)
_lit4_end = ABSOLUTE(.);
. = ALIGN(4);
_thread_local_start = ABSOLUTE(.);
*(.tdata)
*(.tdata.*)
*(.tbss)
*(.tbss.*)
_thread_local_end = ABSOLUTE(.);
_rodata_reserved_end = ABSOLUTE(.);
. = ALIGN(4);
} >default_rodata_seg
_flash_rodata_align = ALIGNOF(.flash.rodata);
.flash.text :
{
_stext = .;
_instruction_reserved_start = ABSOLUTE(.);
_text_start = ABSOLUTE(.);
mapping[flash_text]
*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
*(.irom0.text) /* catch stray ICACHE_RODATA_ATTR */
*(.fini.literal)
*(.fini)
*(.gnu.version)
/** CPU will try to prefetch up to 16 bytes of
* of instructions. This means that any configuration (e.g. MMU, PMS) must allow
* safe access to up to 16 bytes after the last real instruction, add
* dummy bytes to ensure this
*/
. += 16;
_text_end = ABSOLUTE(.);
_instruction_reserved_end = ABSOLUTE(.);
_etext = .;
/* Similar to _iram_start, this symbol goes here so it is
resolved by addr2line in preference to the first symbol in
the flash.text segment.
*/
_flash_cache_start = ABSOLUTE(0);
} >default_code_seg
/* Marks the end of IRAM code segment */
.iram0.text_end (NOLOAD) :
{
. = ALIGN (4);
_iram_end = ABSOLUTE(.);
} > iram0_0_seg
/* Marks the end of data, bss and possibly rodata */
.dram0.heap_start (NOLOAD) :
{
. = ALIGN (8);
_heap_start = ABSOLUTE(.);
} > dram0_0_seg
}
ASSERT(((_iram_text_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)),
"IRAM0 segment data does not fit.")
ASSERT(((_heap_start - _data_start) <= LENGTH(dram0_0_seg)),
"DRAM segment data does not fit.")
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