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* Add full gdb support with uart/Serial integration * Fix GDB merge errors * Update to unpatched GDB protocol specification It appears that Espressif patched the open source xtensa GDB port in order to build their old GDB executable and their old gdbstub (basically removing any register in a generic xtensa and only leaving those present in the chip they synthesized). Their GDBStub also assumed this behavior. Unpatched upstream GNU GDB now expects all the registers in xtensa-config.c to be sent/read on a 'g' command. Change the GDB stub to send "xxxxxxxx"s (legal per the spec) for unimplemented registers. This makes the 'g' response much longer, but it's results are cached and in an interactive debugger it isn't noticeable. * Fix .iram.literal to come before .iram.text for GDB * Move functions to flash, call using wrappers All functions which are not interrupt or exception called are now in flash. A small IRAM wrapper enables flash when processing main GDB ops by calling Cache_Read_Enable_New() and then jumping to the main flash code. This seems to work for catching exceptions, data and code breaks, and Ctrl-C. The UART ISR handler and exception handler register-saving bits of code in ASM are still in IRAM. GDB IRAM usage is now about 670 bytes. * Remove LWIP2 builder commit * Add documentation and gdbstub_init header Add some simple GDB documentation to the main tree showing a worked example. Adds the definition of `void gdbstub_init()` to <GDBStub.h> * Clean up GDB include and library dir Replace GDBstub.h with the version in the internal/ directory, and adjust stub code accordingly. This way, only one copy of a file called "GDBstub.h" will exist. Update the gdbcommands and replace the obsolete ESPRESSIF readme with @kylefleming's version since we're mainly doing serial, not TCP, connected debugging. Bump the library rev. number since this is a pretty big functionality change. Minor documentation tweak. * Undo much of UART refactoring, set fifo IRQ to 16 Remove the refactoring of pin control and other little things not directly related to GDB processing. Should greatly reduce the diff size in uart.c. Should also remove any register value changes (intended or otherwise) introduced in the original PR from @kylefleming. Set the FIFO interrupt to 16 chars when in GDB mode, matching the latest UART configuration for highest speed. * Add architecture comments, cleanup uart.c code Comments added to UART.c trying to explain (as best as I understand it) the changes done to support GDB and how they interact with standard operation. Fix the uart_uninit to stop the ISR and then free appropriately. Fix uart_isr_handle_data (GDB's shim for sending chars to the 8266 app) to do the exact same thing as the standard UART handler including set the overflow properly and either discard or overwrite in that case. Fix serial reception when GDB enabled by enabling the user recv ISR. Remove commented attributes from gdbstub, leftover from the move to flash. General logic cleanup per comments in the PR. * Also set the UART flags for HW error in GDB Ensure we also check the UART flags and set the uart status appropriately when in GDB mode.
21 lines
740 B
Plaintext
21 lines
740 B
Plaintext
# ESP8266 HW limits the number of breakpoints/watchpoints
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set remote hardware-breakpoint-limit 1
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set remote hardware-watchpoint-limit 1
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# Some GDBstub settings
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set remote interrupt-on-connect on
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set remote kill-packet off
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set remote symbol-lookup-packet off
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set remote verbose-resume-packet off
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# The memory map, so GDB knows where it can install SW breakpoints
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mem 0x20000000 0x3fefffff ro cache
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mem 0x3ff00000 0x3fffffff rw
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mem 0x40000000 0x400fffff ro cache
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mem 0x40100000 0x4013ffff rw cache
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mem 0x40140000 0x5fffffff ro cache
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mem 0x60000000 0x60001fff rw
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# Change the following to your sketch's ELF file
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file /path/to/sketch.ino.elf
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# Change the following to your serial port and baud
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set serial baud 115200
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target remote /dev/ttyUSB0
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