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esp-open-rtos/ld/eagle.app.v6.ld
Angus Gratton ed7ba52c9a Add exception vectors & low-level handlers 
At the moment these are almost bit-for-bit copies of the vector
behaviour in the RTOS SDK, but hopefully that will start to change.

Progress towards #2
2015-07-28 11:01:57 +10:00

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/* This linker script generated from xt-genldscripts.tpp for LSP .
Modified for esp open RTOS, this linker script is no longer the same as the esp_iot_rtos_sdk one.
*/
/* FreeRTOS memory management functions
We link these directly to newlib functions (have to do it at link
time as binary libraries use these symbols too.)
*/
pvPortMalloc = malloc;
vPortFree = free;
/* FreeRTOS lock functions.
Rely on a patch to libc that produces weak linked versions of the
below symbols. Currently treating locking primitives like universal
global critical section rather than individual locks, but this seems
OK from the use cases in newlib.
*/
_lock_acquire = vPortEnterCritical;
_lock_acquire_recursive = vPortEnterCritical;
_lock_try_acquire = vPortEnterCritical;
_lock_try_acquire_recursive = vPortEnterCritical;
_lock_release = vPortExitCritical;
_lock_release_recursive = vPortExitCritical;
/* SDK compatibility */
ets_printf = printf;
/* Evaluate FLASH_SIZE to calculate irom size, etc.
*/
#ifndef OTA
#define IROM0_START 0x40240000
/* Non-OTA sizes */
#if FLASH_SIZE == 2 /* 256kB */
#define IROM0_LEN 0x3C000
#elif FLASH_SIZE == 4 /* 512kB */
#define IROM0_LEN 0x7C000
#elif FLASH_SIZE == 8 /* 1MB */
#define IROM0_LEN 0xFC000
#elif FLASH_SIZE == 16 /* 2MB */
#define IROM0_LEN 0x1FC000
#elif FLASH_SIZE == 32 /* 4MB */
#define IROM0_LEN 0x3FC000
#else /*FLASH_SIZE*/
#error "Unknown flash size for linker script. Check the FLASH_SIZE variable in your Makefile."
#endif
#else /* OTA */
/* IROM0 becomes an actual "section" of the bootloader image, so we need to leave
space for the bootloader (0x2000 bytes) and space for the bootloader & section
headers (0x10 bytes)
*/
#define IROM0_START 0x40202010
/* OTA sizes */
#if FLASH_SIZE < 16
#error "OTA support currently requires 16 or 32 megabit flash"
#elif FLASH_SIZE == 16 || FLASH_SIZE == 32
/* 1MB irom0 section regardless, minus the space for the bootloader */
#define IROM0_LEN (0x100000 - 0x2010)
#else /*FLASH_SIZE*/
#error "Unknown flash size for linker script. Check the FLASH_SIZE variable in your Makefile."
#endif
#endif
/* Linker Script for ld -N */
MEMORY
{
dport0_0_seg : org = 0x3FF00000, len = 0x10
dram0_0_seg : org = 0x3FFE8000, len = 0x14000
iram1_0_seg : org = 0x40100000, len = 0x08000
irom0_0_seg : org = IROM0_START, len = IROM0_LEN
}
PHDRS
{
dport0_0_phdr PT_LOAD;
dram0_0_phdr PT_LOAD;
dram0_0_bss_phdr PT_LOAD;
iram1_0_phdr PT_LOAD;
irom0_0_phdr PT_LOAD;
}
/* Default entry point: */
ENTRY(call_user_start)
PROVIDE(_memmap_vecbase_reset = 0x40000000);
/* Various memory-map dependent cache attribute settings: */
_memmap_cacheattr_wb_base = 0x00000110;
_memmap_cacheattr_wt_base = 0x00000110;
_memmap_cacheattr_bp_base = 0x00000220;
_memmap_cacheattr_unused_mask = 0xFFFFF00F;
_memmap_cacheattr_wb_trapnull = 0x2222211F;
_memmap_cacheattr_wba_trapnull = 0x2222211F;
_memmap_cacheattr_wbna_trapnull = 0x2222211F;
_memmap_cacheattr_wt_trapnull = 0x2222211F;
_memmap_cacheattr_bp_trapnull = 0x2222222F;
_memmap_cacheattr_wb_strict = 0xFFFFF11F;
_memmap_cacheattr_wt_strict = 0xFFFFF11F;
_memmap_cacheattr_bp_strict = 0xFFFFF22F;
_memmap_cacheattr_wb_allvalid = 0x22222112;
_memmap_cacheattr_wt_allvalid = 0x22222112;
_memmap_cacheattr_bp_allvalid = 0x22222222;
PROVIDE(_memmap_cacheattr_reset = _memmap_cacheattr_wb_trapnull);
SECTIONS
{
.dport0.rodata : ALIGN(4)
{
_dport0_rodata_start = ABSOLUTE(.);
*(.dport0.rodata)
*(.dport.rodata)
_dport0_rodata_end = ABSOLUTE(.);
} >dport0_0_seg :dport0_0_phdr
.dport0.literal : ALIGN(4)
{
_dport0_literal_start = ABSOLUTE(.);
*(.dport0.literal)
*(.dport.literal)
_dport0_literal_end = ABSOLUTE(.);
} >dport0_0_seg :dport0_0_phdr
.dport0.data : ALIGN(4)
{
_dport0_data_start = ABSOLUTE(.);
*(.dport0.data)
*(.dport.data)
_dport0_data_end = ABSOLUTE(.);
} >dport0_0_seg :dport0_0_phdr
.data : ALIGN(4)
{
_data_start = ABSOLUTE(.);
*(.data)
*(.data.*)
*(.gnu.linkonce.d.*)
*(.data1)
*(.sdata)
*(.sdata.*)
*(.gnu.linkonce.s.*)
*(.sdata2)
*(.sdata2.*)
*(.gnu.linkonce.s2.*)
*(.jcr)
_data_end = ABSOLUTE(.);
} >dram0_0_seg :dram0_0_phdr
.rodata : ALIGN(4)
{
_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)
/* C++ constructor and destructor tables, properly ordered: */
KEEP (*crtbegin.o(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
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)
. = ALIGN(4); /* this table MUST be 4-byte aligned */
_bss_table_start = ABSOLUTE(.);
LONG(_bss_start)
LONG(_bss_end)
_bss_table_end = ABSOLUTE(.);
_rodata_end = ABSOLUTE(.);
} >dram0_0_seg :dram0_0_phdr
.bss ALIGN(8) (NOLOAD) : ALIGN(4)
{
. = 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(.);
_heap_start = ABSOLUTE(.);
/* _stack_sentry = ALIGN(0x8); */
} >dram0_0_seg :dram0_0_bss_phdr
/* __stack = 0x3ffc8000; */
.text : ALIGN(4) /* IRAM */
{
_stext = .;
_text_start = ABSOLUTE(.);
. = ALIGN (16);
*(.vecbase.text)
*(.entry.text)
*(.init.literal)
*(.init)
/* esp-open-rtos compiled source files use the .iram1.* section names for IRAM
functions, etc. */
*(.iram1.*)
/* SDK libraries expect their .text sections to link to iram, not irom */
*sdklib*:*(.literal .text .literal.* .text.*)
/* libgcc functions also need to be in .text, as some are called before
flash is mapped (also performance)
*/
*libgcc.a:*.o(.literal .text .literal.* .text.*)
*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
*(.fini.literal)
*(.fini)
*(.gnu.version)
_text_end = ABSOLUTE(.);
_etext = .;
} >iram1_0_seg :iram1_0_phdr
.irom0.text : ALIGN(4)
{
_irom0_text_start = ABSOLUTE(.);
/* esp-open-rtos compiled code goes into IROM by default
(except for libgcc which is matched above.)
*/
*(.literal .text .literal.* .text.*)
/* SDK libraries expect ICACHE_FLASH_ATTR/etc functions to be loaded explicitly as IROM */
*sdklib*:*(.irom.* .irom.*.* .irom0.*)
_irom0_text_end = ABSOLUTE(.);
} >irom0_0_seg :irom0_0_phdr
.lit4 : ALIGN(4)
{
_lit4_start = ABSOLUTE(.);
*(*.lit4)
*(.lit4.*)
*(.gnu.linkonce.lit4.*)
_lit4_end = ABSOLUTE(.);
} >iram1_0_seg :iram1_0_phdr
}
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