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2010-12-27 Kevin Buettner <kevinb@redhat.com>

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Hui Zhu  <teawater@gmail.com>

	* mips-tedp.c (mips_register_name): Add comments.
This commit is contained in:
Hui Zhu 2010-12-27 08:17:34 +00:00
parent a64718d3b1
commit 6229fbeaa6
2 changed files with 15 additions and 1 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2010-12-27 Kevin Buettner <kevinb@redhat.com>
Hui Zhu <teawater@gmail.com>
* mips-tedp.c (mips_register_name): Add comments.
2010-12-23 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (thumb_analyze_prologue): Move some code ...

11
gdb/mips-tdep.c
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@ -454,7 +454,16 @@ mips_register_name (struct gdbarch *gdbarch, int regno)
enum mips_abi abi = mips_abi (gdbarch);
/* Map [gdbarch_num_regs .. 2*gdbarch_num_regs) onto the raw registers,
but then don't make the raw register names visible. */
but then don't make the raw register names visible. This (upper)
range of user visible register numbers are the pseudo-registers.
This approach was adopted accommodate the following scenario:
It is possible to debug a 64-bit device using a 32-bit
programming model. In such instances, the raw registers are
configured to be 64-bits wide, while the pseudo registers are
configured to be 32-bits wide. The registers that the user
sees - the pseudo registers - match the users expectations
given the programming model being used. */
int rawnum = regno % gdbarch_num_regs (gdbarch);
if (regno < gdbarch_num_regs (gdbarch))
return "";