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[newlib-cygwin] Update FAQ answer about setting an early breakpoint
- From: Jon TURNEY <jturney at sourceware dot org>
- To: cygwin-cvs at sourceware dot org
- Date: 20 Oct 2016 12:13:38 -0000
- Subject: [newlib-cygwin] Update FAQ answer about setting an early breakpoint
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=afcde266182f4283a3a777570face6457b8d22b0
commit afcde266182f4283a3a777570face6457b8d22b0
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date: Sun Sep 11 13:41:32 2016 +0100
Update FAQ answer about setting an early breakpoint
Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
Diff:
---
winsup/doc/faq-programming.xml | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/winsup/doc/faq-programming.xml b/winsup/doc/faq-programming.xml
index c64ab4a..5234414 100644
--- a/winsup/doc/faq-programming.xml
+++ b/winsup/doc/faq-programming.xml
@@ -811,13 +811,22 @@ Guide here: <ulink url="https://cygwin.com/cygwin-ug-net/dll.html"/>.
</answer></qandaentry>
<qandaentry id="faq.programming.breakpoint">
-<question><para>How can I set a breakpoint at MainCRTStartup?</para></question>
+<question><para>How can I set a breakpoint at mainCRTStartup?</para></question>
<answer>
-<para><emphasis role='bold'>(Please note: This section has not yet been updated for the latest net release.)</emphasis>
+<para>
+ Set a breakpoint in <command>gdb</command> with <command>b *0x401000</command>
+ (for i686), or <command>b *0x100401000</command> (for x86_64).
+</para>
+
+<para>
+ This entrypoint address can be computed as the sum of the ImageBase and
+ AddressOfEntryPoint values given by <command>objdump -p</command>.
</para>
-<para>Set a breakpoint at *0x401000 in gdb and then run the program in
-question.
+
+<para>
+ Note that the DllMain entrypoints for linked DLLs will have been executed
+ before this breakpoint is hit.
</para>
</answer></qandaentry>