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From: Tom Tromey <tromey@redhat.com>
To: paawan oza <paawan1982@yahoo.com>
Cc: Petr =?utf-8?Q?Hluz=C3=ADn?= <petr.hluzin@gmail.com>, gdb@sourceware.org,        gdb-patches@sourceware.org
Subject: Re: [PATCH] arm reversible : <phase_2_complete>
References: <341905.10459.qm@web112513.mail.gq1.yahoo.com>	<m3d3m8xdf7.fsf@fleche.redhat.com>	<208397.95006.qm@web112517.mail.gq1.yahoo.com>	<4DA27006.1080607@codesourcery.com>	<763549.92092.qm@web112506.mail.gq1.yahoo.com>	<335149.24692.qm@web112515.mail.gq1.yahoo.com>	<BANLkTik+_-KcX+=vVOeqwX-FNxYkQuEzXA@mail.gmail.com>	<592215.58786.qm@web112508.mail.gq1.yahoo.com>	<172713.29831.qm__351.089161313389$1303740245$gmane$org@web112503.mail.gq1.yahoo.com>	<m3zknet882.fsf@fleche.redhat.com>	<136943.43839.qm@web112518.mail.gq1.yahoo.com>	<m3iptyfbgq.fsf@fleche.redhat.com>	<727567.12089.qm__13056.408687453$1304018591$gmane$org@web112511.mail.gq1.yahoo.com>
Date: Thu, 28 Apr 2011 19:36:00 -0000
In-Reply-To: <727567.12089.qm__13056.408687453$1304018591$gmane$org@web112511.mail.gq1.yahoo.com>	(paawan oza's message of "Thu, 28 Apr 2011 12:22:42 -0700 (PDT)")
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>>>>> "Oza" == paawan oza <paawan1982@yahoo.com> writes:

Oza> but whole operation happens on target memory, so 
Oza> after 
Oza> GET_REG_VAL (reg_cache, ARM_PC_REGNUM, &u_buf.buf[0]);

Oza> we get scalar u_buf.s_word again in big-endian.

Oza> +      start_address = u_buf.s_word -  \
Oza> +                   (4 * (bit (thumb_insn_r->arm_insn, 8) + register_count)) ;

Oza> and above math is again in target memory in big endian machine and
Oza> record is saved to target memory.

Oza> I think it never gets fetched to host for any reason, Am I thinking
Oza> correct?

No, sorry.  Any code in gdb is by running on the host system.

So, GET_REG_VAL fetches the raw register -- from the target to the host.
`u_buf.s_word' is a scalar value in gdb, i.e., on the host.

Tom