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* [Bug tdep/12013] New: MIPS tracepoint cannot collect stack info through collect *(unsigned char *)($sp)@512
@ 2010-09-14 3:36 teawater at gmail dot com
0 siblings, 0 replies; only message in thread
From: teawater at gmail dot com @ 2010-09-14 3:36 UTC (permalink / raw)
To: gdb-prs
I try MIPS tracepoint but when I want to use collect *(unsigned char *)($sp)@512
to collect the stack info, but I got:
(gdb) actions
Enter actions for tracepoint 1, one per line.
End with a line saying just "end".
>collect *(unsigned char *)($sp)@512
'sp' is a pseudo-register; GDB cannot yet trace pseudoregister contents.
That is because in ax-gdb.c:
reg = user_reg_map_name_to_regnum (exp->gdbarch, name, strlen (name));
if (reg == -1)
internal_error (__FILE__, __LINE__,
_("Register $%s not available"), name);
if (reg >= gdbarch_num_regs (exp->gdbarch))
error (_("'%s' is a pseudo-register; "
"GDB cannot yet trace pseudoregister contents."),
name);
In user_reg_map_name_to_regnum, it will call mips_register_name to get reg name:
But in function mips_register_name:
/* Map [gdbarch_num_regs .. 2*gdbarch_num_regs) onto the raw registers,
but then don't make the raw register names visible. */
int rawnum = regno % gdbarch_num_regs (gdbarch);
if (regno < gdbarch_num_regs (gdbarch))
return "";
So it make user_reg_map_name_to_regnum just can return the "reg" bigger than
gdbarch_num_regs.
Then it will get this error message. Do you have some way to handle this issue?
--
Summary: MIPS tracepoint cannot collect stack info through
collect *(unsigned char *)($sp)@512
Product: gdb
Version: HEAD
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tdep
AssignedTo: unassigned at sourceware dot org
ReportedBy: teawater at gmail dot com
CC: gdb-prs at sourceware dot org
http://sourceware.org/bugzilla/show_bug.cgi?id=12013
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2010-09-14 3:36 [Bug tdep/12013] New: MIPS tracepoint cannot collect stack info through collect *(unsigned char *)($sp)@512 teawater at gmail dot com
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