ESP32 JTAG
来自Jack's Lab
（版本间的差异）
(→GDB Tips) |
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| 第15行： | 第15行： | ||
== GDB Tips == | == GDB Tips == | ||
| − | + | === Display Register === | |
<pre> | <pre> | ||
| 第22行： | 第22行： | ||
(gdb) i r esp | (gdb) i r esp | ||
(gdb) i r pc | (gdb) i r pc | ||
| − | </ | + | </source> |
| − | + | === Display Memory === | |
| − | < | + | <source lang=bash> |
(gdb) x /wx 0x80040000 # Displays the data at the specified address in hexadecimal | (gdb) x /wx 0x80040000 # Displays the data at the specified address in hexadecimal | ||
(gdb) x /8x $esp | (gdb) x /8x $esp | ||
| 第33行： | 第33行： | ||
(gdb) x /16s 0x86468700 # Displays the data at the specified address as a string | (gdb) x /16s 0x86468700 # Displays the data at the specified address as a string | ||
(gdb) x /24i 0x8048a51 # Display the data at the specified address as instruction (24 instructions) | (gdb) x /24i 0x8048a51 # Display the data at the specified address as instruction (24 instructions) | ||
| − | </ | + | </source> |
| − | + | === Modify Register === | |
| − | < | + | <source lang=bash> |
(gdb) set $v0 = 0x004000000 | (gdb) set $v0 = 0x004000000 | ||
(gdb) set $epc = 0xbfc00000 | (gdb) set $epc = 0xbfc00000 | ||
| − | </ | + | </source> |
| − | + | === Modify Memory === | |
| − | < | + | <source lang=bash> |
(gdb) set {unsigned int}0x8048a51=0x0 | (gdb) set {unsigned int}0x8048a51=0x0 | ||
(gdb) set *(unsigned int*)0x8048a54=0x55aa55aa | (gdb) set *(unsigned int*)0x8048a54=0x55aa55aa | ||
| − | </ | + | </source> |
| − | + | === Search Memory === | |
| − | < | + | <source lang=bash> |
Usage: find <start> <end> <count> <value> | Usage: find <start> <end> <count> <value> | ||
| 第68行： | 第68行： | ||
end | end | ||
end | end | ||
| − | </ | + | </source> |
| − | + | === Breakpoint & Watchpoint === | |
| − | < | + | <source lang=bash> |
(gdb) b *0x80400000 | (gdb) b *0x80400000 | ||
(gdb) watch *(unsigned int *)0xbffff400==0x90909090 | (gdb) watch *(unsigned int *)0xbffff400==0x90909090 | ||
| − | </ | + | </source> |
<br><br> | <br><br> | ||
2016年11月6日 (日) 12:54的版本
目录 |
1 Overview
$ sudo apt-get install libftdi-dev make libtool pkg-config autoconf automake texinfo $ git clone --recursive git://github.com/espressif/openocd-esp32.git $ cd openocd-esp32 $ ./bootstrap $ make && sudo make install
2 GDB Tips
3 GDB Tips
3.1 Display Register
(gdb) i r
(gdb) i r a # show all registers including float and multimedia
(gdb) i r esp
(gdb) i r pc
</source>
=== Display Memory ===
<source lang=bash>
(gdb) x /wx 0x80040000 # Displays the data at the specified address in hexadecimal
(gdb) x /8x $esp
(gdb) x /16x $esp+12
(gdb) x /16s 0x86468700 # Displays the data at the specified address as a string
(gdb) x /24i 0x8048a51 # Display the data at the specified address as instruction (24 instructions)
</source>
=== Modify Register ===
<source lang=bash>
(gdb) set $v0 = 0x004000000
(gdb) set $epc = 0xbfc00000
</source>
=== Modify Memory ===
<source lang=bash>
(gdb) set {unsigned int}0x8048a51=0x0
(gdb) set *(unsigned int*)0x8048a54=0x55aa55aa
</source>
=== Search Memory ===
<source lang=bash>
Usage: find <start> <end> <count> <value>
(gdb) define find
set $ptr = $arg0
set $cnt = 0
while ( ($ptr<=$arg1) && ($cnt<$arg2) )
if ( *(unsigned int *)$ptr == $arg3 )
x /wx $ptr
set $cnt = $cnt + 1
end
set $ptr = $ptr + 4
end
end
</source>
=== Breakpoint & Watchpoint ===
<source lang=bash>
(gdb) b *0x80400000
(gdb) watch *(unsigned int *)0xbffff400==0x90909090
</source>
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