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targets/esp32: adjust memory usage and export required symbols for wifi

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Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2026-07-14 00:32:54 +02:00
committed by Ron Evans
parent 0c17b918fb
commit 2dea20b769
1 changed files with 11 additions and 4 deletions
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targets/esp32.ld
+11 -4
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@@ -15,9 +15,10 @@
MEMORY
{
/* SRAM2 (0x3FFAE000-0x3FFE0000, 200K): a single safe contiguous block used
* for the stack, initialized .data, .bss, and the whole Go GC heap. */
DRAM (rw) : ORIGIN = 0x3FFAE000, LENGTH = 200K
/* SRAM2 usable DRAM (0x3FFB0000-0x3FFE0000, 192K): reserve the first 8KB
* (0x3FFAE000-0x3FFB0000) for ROM conventions, then use the rest for the
* stack, initialized .data, .bss, and the whole Go GC heap. */
DRAM (rw) : ORIGIN = 0x3FFB0000, LENGTH = 192K
/* Top of SRAM1 (0x3FFF0000-0x40000000, 64K): pool 7 + pool 6. This is the
* ONLY part of SRAM1 that is safe for us to use:
@@ -185,7 +186,7 @@ SECTIONS
_globals_start = _sbss;
_globals_end = _wifi_bss_end;
_heap_start = _edata;
/* Go GC heap = the rest of SRAM2 above .bss (~121KB), a single safe contiguous
/* Go GC heap = the rest of SRAM2 above .bss (~113KB), a single safe contiguous
* block. The WiFi arena lives in DRAM1 (SRAM1 pool 7/6), so its ~64KB does not
* consume Go heap and its DMA is isolated from GC objects. The heap never
* touches SRAM1's ROM/MAC-dump regions (0x3FFE0000-0x3FFF0000, left unused). */
@@ -193,6 +194,12 @@ _heap_end = 0x3FFE0000;
_stack_size = 4K;
/* ESP32 ROM-owned PHY DRAM symbols from ESP-IDF esp32.rom.ld.
* Exposed as linker symbols so firmware code can reference them without
* hardcoding addresses in C sources. */
PROVIDE ( rom_phyFuns = 0x3ffae0c0 );
PROVIDE ( g_phyFuns_instance = 0x3ffae0c4 );
/* From ESP-IDF:
* components/esp_rom/esp32/ld/esp32.rom.newlib-funcs.ld
* This is the subset that is sometimes used by LLVM during codegen, and thus