In objdump the 5th, 6th, and 7th fields are the VMA, LMA, and file
offset, respectively. These fields are the same for many binaries, but
for recent chrome binaries the VMA and LMA are the file offset + 0x1000.
From recent experience, it appears that gdb is making the calculation
for add-symbol-file based on the VMA, so update the documentation to use
field 5.
Change-Id: Ib49c18abce03a99ce49bc0b4241c3b64b229508a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4455180
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Commit-Queue: Ben Wagner <bungeman@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1133426}
0cab631e2c