as: Previous
7.71 '.previous'
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This is one of the ELF section stack manipulation directives. The
DONTPRINTYET others are '.section' (Section), '.subsection' (*noteDONTPRINTYET others are '.section' (Section), '.subsection' (
SubSection), '.pushsection' (PushSection), and '.popsection'
(PopSection).
This directive swaps the current section (and subsection) with most
recently referenced section/subsection pair prior to this one. Multiple
'.previous' directives in a row will flip between two sections (and
their subsections). For example:
.section A
.subsection 1
.word 0x1234
.subsection 2
.word 0x5678
.previous
.word 0x9abc
Will place 0x1234 and 0x9abc into subsection 1 and 0x5678 into
subsection 2 of section A. Whilst:
.section A
.subsection 1
# Now in section A subsection 1
.word 0x1234
.section B
.subsection 0
# Now in section B subsection 0
.word 0x5678
.subsection 1
# Now in section B subsection 1
.word 0x9abc
.previous
# Now in section B subsection 0
.word 0xdef0
Will place 0x1234 into section A, 0x5678 and 0xdef0 into subsection 0
of section B and 0x9abc into subsection 1 of section B.
In terms of the section stack, this directive swaps the current
section with the top section on the section stack.