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authorPeter Maydell <peter.maydell@linaro.org>2020-05-07 14:47:55 +0100
committerPeter Maydell <peter.maydell@linaro.org>2020-05-14 15:03:08 +0100
commitc888f7e0fdcc09c86004330ab5cad62bf98cc71c (patch)
tree13e517c10433aeed092c6977c7dea558e02d3573 /gdb-xml
parent035b448b84f3557206abc44d786c5d3db2638f7d (diff)
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target/arm: Use correct GDB XML for M-profile cores
GDB's remote protocol requires M-profile cores to use the feature name 'org.gnu.gdb.arm.m-profile' instead of the 'org.gnu.gdb.arm.core' feature used for A- and R-profile cores. We weren't doing this, which meant GDB treated our M-profile cores like A-profile ones. This mostly doesn't matter, but for instance means that it doesn't correctly handle backtraces where an M-profile exception frame is involved. Ship a copy of GDB's arm-m-profile.xml and use it on the M-profile cores. The integer registers have the same offsets as the arm-core.xml, but register 25 is the M-profile XPSR rather than the A-profile CPSR, so we need to update arm_cpu_gdb_read_register() and arm_cpu_gdb_write_register() to handle XSPR reads and writes. Fixes: https://bugs.launchpad.net/qemu/+bug/1877136 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20200507134755.13997-1-peter.maydell@linaro.org
Diffstat (limited to 'gdb-xml')
-rw-r--r--gdb-xml/arm-m-profile.xml27
1 files changed, 27 insertions, 0 deletions
diff --git a/gdb-xml/arm-m-profile.xml b/gdb-xml/arm-m-profile.xml
new file mode 100644
index 0000000..5319d76
--- /dev/null
+++ b/gdb-xml/arm-m-profile.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010-2020 Free Software Foundation, Inc.
+
+ Copying and distribution of this file, with or without modification,
+ are permitted in any medium without royalty provided the copyright
+ notice and this notice are preserved. -->
+
+<!DOCTYPE feature SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.arm.m-profile">
+ <reg name="r0" bitsize="32"/>
+ <reg name="r1" bitsize="32"/>
+ <reg name="r2" bitsize="32"/>
+ <reg name="r3" bitsize="32"/>
+ <reg name="r4" bitsize="32"/>
+ <reg name="r5" bitsize="32"/>
+ <reg name="r6" bitsize="32"/>
+ <reg name="r7" bitsize="32"/>
+ <reg name="r8" bitsize="32"/>
+ <reg name="r9" bitsize="32"/>
+ <reg name="r10" bitsize="32"/>
+ <reg name="r11" bitsize="32"/>
+ <reg name="r12" bitsize="32"/>
+ <reg name="sp" bitsize="32" type="data_ptr"/>
+ <reg name="lr" bitsize="32"/>
+ <reg name="pc" bitsize="32" type="code_ptr"/>
+ <reg name="xpsr" bitsize="32" regnum="25"/>
+</feature>