5551b3f616
When 2nd stage bootloader loads the ROM bootloader, it prints a message similar to "entry 0x40080xxx", which idf_monitor decodes (using application ELF file) as one of the reset vectors (xxx is < 400h). This moves the iram_seg of bootloader 1k up to prevent overlap of bootloader .text and application vectors, making the output look nicer. There is still a chance that the entry point decodes as some symbol in application ELF file, but at least it won't have "Exception" in its name.
163 lines
4.3 KiB
Plaintext
163 lines
4.3 KiB
Plaintext
/*
|
|
Linker file used to link the bootloader.
|
|
*/
|
|
|
|
|
|
/* Simplified memory map for the bootloader
|
|
|
|
The main purpose is to make sure the bootloader can load into main memory
|
|
without overwriting itself.
|
|
*/
|
|
|
|
MEMORY
|
|
{
|
|
/* I/O */
|
|
dport0_seg (RW) : org = 0x3FF00000, len = 0x10
|
|
/* IRAM POOL1, used for APP CPU cache. Bootloader runs from here during the final stage of loading the app because APP CPU is still held in reset, the main app enables APP CPU cache */
|
|
iram_loader_seg (RWX) : org = 0x40078000, len = 0x8000 /* 32KB, APP CPU cache */
|
|
/* 63kB, IRAM. We skip the first 1k to prevent the entry point being
|
|
placed into the same range as exception vectors in the app.
|
|
This leads to idf_monitor decoding ROM bootloader "entry 0x40080xxx"
|
|
message as one of the exception vectors, which looks scary to users.
|
|
*/
|
|
iram_seg (RWX) : org = 0x40080400, len = 0xfc00
|
|
/* 64k at the end of DRAM, after ROM bootloader stack */
|
|
dram_seg (RW) : org = 0x3FFF0000, len = 0x10000
|
|
}
|
|
|
|
/* Default entry point: */
|
|
ENTRY(call_start_cpu0);
|
|
|
|
|
|
SECTIONS
|
|
{
|
|
|
|
.iram_loader.text :
|
|
{
|
|
. = ALIGN (16);
|
|
_stext = .;
|
|
_text_start = ABSOLUTE(.);
|
|
*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
|
|
*(.iram1 .iram1.*) /* catch stray IRAM_ATTR */
|
|
*liblog.a:(.literal .text .literal.* .text.*)
|
|
*libgcc.a:(.literal .text .literal.* .text.*)
|
|
*libbootloader_support.a:bootloader_utility.o(.literal .text .literal.* .text.*)
|
|
*libbootloader_support.a:esp_image_format.o(.literal .text .literal.* .text.*)
|
|
*libbootloader_support.a:bootloader_random.o(.literal .text .literal.* .text.*)
|
|
*libbootloader_support.a:bootloader_flash.o(.literal .text .literal.* .text.*)
|
|
*libbootloader_support.a:flash_partitions.o(.literal .text .literal.* .text.*)
|
|
*libbootloader_support.a:bootloader_sha.o(.literal .text .literal.* .text.*)
|
|
*(.fini.literal)
|
|
*(.fini)
|
|
*(.gnu.version)
|
|
_text_end = ABSOLUTE(.);
|
|
_etext = .;
|
|
} > iram_loader_seg
|
|
|
|
.iram.text :
|
|
{
|
|
. = ALIGN (16);
|
|
*(.entry.text)
|
|
*(.init.literal)
|
|
*(.init)
|
|
} > iram_seg
|
|
|
|
|
|
/* Shared RAM */
|
|
.dram0.bss (NOLOAD) :
|
|
{
|
|
. = ALIGN (8);
|
|
_bss_start = ABSOLUTE(.);
|
|
*(.dynsbss)
|
|
*(.sbss)
|
|
*(.sbss.*)
|
|
*(.gnu.linkonce.sb.*)
|
|
*(.scommon)
|
|
*(.sbss2)
|
|
*(.sbss2.*)
|
|
*(.gnu.linkonce.sb2.*)
|
|
*(.dynbss)
|
|
*(.bss)
|
|
*(.bss.*)
|
|
*(.gnu.linkonce.b.*)
|
|
*(COMMON)
|
|
. = ALIGN (8);
|
|
_bss_end = ABSOLUTE(.);
|
|
} >dram_seg
|
|
|
|
.dram0.data :
|
|
{
|
|
_data_start = ABSOLUTE(.);
|
|
*(.data)
|
|
*(.data.*)
|
|
*(.gnu.linkonce.d.*)
|
|
*(.data1)
|
|
*(.sdata)
|
|
*(.sdata.*)
|
|
*(.gnu.linkonce.s.*)
|
|
*(.sdata2)
|
|
*(.sdata2.*)
|
|
*(.gnu.linkonce.s2.*)
|
|
*(.jcr)
|
|
_data_end = ABSOLUTE(.);
|
|
} >dram_seg
|
|
|
|
.dram0.rodata :
|
|
{
|
|
_rodata_start = ABSOLUTE(.);
|
|
*(.rodata)
|
|
*(.rodata.*)
|
|
*(.gnu.linkonce.r.*)
|
|
*(.rodata1)
|
|
__XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
|
|
*(.xt_except_table)
|
|
*(.gcc_except_table)
|
|
*(.gnu.linkonce.e.*)
|
|
*(.gnu.version_r)
|
|
*(.eh_frame)
|
|
. = (. + 3) & ~ 3;
|
|
/* C++ constructor and destructor tables, properly ordered: */
|
|
__init_array_start = ABSOLUTE(.);
|
|
KEEP (*crtbegin.o(.ctors))
|
|
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
|
|
KEEP (*(SORT(.ctors.*)))
|
|
KEEP (*(.ctors))
|
|
__init_array_end = ABSOLUTE(.);
|
|
KEEP (*crtbegin.o(.dtors))
|
|
KEEP (*(EXCLUDE_FILE (*crtend.o) .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)
|
|
_rodata_end = ABSOLUTE(.);
|
|
/* Literals are also RO data. */
|
|
_lit4_start = ABSOLUTE(.);
|
|
*(*.lit4)
|
|
*(.lit4.*)
|
|
*(.gnu.linkonce.lit4.*)
|
|
_lit4_end = ABSOLUTE(.);
|
|
. = ALIGN(4);
|
|
_heap_start = ABSOLUTE(.);
|
|
} >dram_seg
|
|
|
|
.iram.text :
|
|
{
|
|
_stext = .;
|
|
_text_start = ABSOLUTE(.);
|
|
*(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
|
|
*(.iram .iram.*) /* catch stray IRAM_ATTR */
|
|
*(.fini.literal)
|
|
*(.fini)
|
|
*(.gnu.version)
|
|
_text_end = ABSOLUTE(.);
|
|
_etext = .;
|
|
} > iram_seg
|
|
|
|
}
|