esp-idf/components/driver/rmt/linker.lf

[mapping:rmt_driver]
archive: libdriver.a
entries:
    if RMT_RECV_FUNC_IN_IRAM = y:
        rmt_rx: rmt_receive (noflash)
        if SOC_RMT_SUPPORT_DMA = y:
            rmt_rx: rmt_rx_mount_dma_buffer (noflash)