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Use linker scripts rather than libcirom/objcopy tricks to arrange

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IRAM/IROM sections.

esp-open-rtos compiled code: .text goes into irom by default, symbols
explicitly marked with IRAM attribute go into iram.

SDK code: .text goes into iram by default, symbols marked with
ICACHE_FLASH_ATTR go into irom.

libgcc functions also go into iram by default.
This commit is contained in:
Angus Gratton 2015-07-09 13:48:47 +10:00
parent 4217a1029e
commit a566a51c09
2 changed files with 26 additions and 12 deletions
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3
common.mk
View file

@ -65,7 +65,7 @@ COMPONENTS ?= core FreeRTOS lwip axtls
SDK_LIBS ?= main net80211 phy pp wpa
# open source libraries linked in
LIBS ?= gcc hal cirom
LIBS ?= hal gcc c
# Note: this isn't overridable without a not-yet-merged patch to esptool
ENTRY_SYMBOL = call_user_start
@ -171,7 +171,6 @@ $$($(1)_OBJ_DIR)%.o: $$($(1)_REAL_ROOT)%.c $$($(1)_MAKEFILE) $(wildcard $(ROOT)*
$(Q) mkdir -p $$(dir $$@)
$$($(1)_CC_ARGS) -c $$< -o $$@
$$($(1)_CC_ARGS) -MM -MT $$@ -MF $$(@:.o=.d) $$<
$(Q) $(OBJCOPY) --rename-section .text=.irom0.text --rename-section .literal=.irom0.literal $$@
# the component is shown to depend on both obj and source files so we get a meaningful error message
# for missing explicitly named source files

35
ld/eagle.app.v6.ld
View file

@ -33,7 +33,7 @@ MEMORY
{
dport0_0_seg : org = 0x3FF00000, len = 0x10
dram0_0_seg : org = 0x3FFE8000, len = 0x14000
iram1_0_seg : org = 0x40100000, len = 0x8000
iram1_0_seg : org = 0x40100000, len = 0x08000
irom0_0_seg : org = 0x40240000, len = 0x7C000
}
@ -186,7 +186,7 @@ SECTIONS
} >dram0_0_seg :dram0_0_bss_phdr
/* __stack = 0x3ffc8000; */
.text : ALIGN(4)
.text : ALIGN(4) /* IRAM */
{
_stext = .;
_text_start = ABSOLUTE(.);
@ -217,7 +217,17 @@ SECTIONS
*(.entry.text)
*(.init.literal)
*(.init)
*(.literal .text .literal.* .text.* .iram1.text iram1.literal .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
/* 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)
@ -225,6 +235,18 @@ SECTIONS
_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(.);
@ -233,11 +255,4 @@ SECTIONS
*(.gnu.linkonce.lit4.*)
_lit4_end = ABSOLUTE(.);
} >iram1_0_seg :iram1_0_phdr
.irom0.text : ALIGN(4)
{
_irom0_text_start = ABSOLUTE(.);
*(.irom0.literal .irom.literal .irom.text.literal .irom0.text .irom.text)
_irom0_text_end = ABSOLUTE(.);
} >irom0_0_seg :irom0_0_phdr
}