SLAU131V User guide | 德州仪器 TI.com.cn

SLAU131V October 2004 – February 2020

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Example 20. Controlling the Placement of the Linker-Generated Copy Table Sections

SECTIONS
{
   UNION
   {
      .first: { a1.c.obj(.text), b1.c.obj(.text), c1.c.obj(.text) }
             load = EMEM, run = PMEM, table(BINIT), table(_first_ctbl)

      .second: { a2.c.obj(.text), b2.c.obj(.text) }
             load = EMEM, run = PMEM, table(_second_ctbl)
   }

   .extra: load = EMEM, run = PMEM, table(BINIT)
   ...
   .ovly: { } > BMEM
   .binit: { } > BMEM
}

For the linker command file in Example 20, the boot-time copy table is generated into a .binit input section, which is collected into the .binit output section, which is mapped to an address in the BMEM memory area. The _first_ctbl is generated into the .ovly:_first_ctbl input section and the _second_ctbl is generated into the .ovly:_second_ctbl input section. Since the base names of these input sections match the name of the .ovly output section, the input sections are collected into the .ovly output section, which is then mapped to an address in the BMEM memory area.

If you do not provide explicit placement instructions for the linker-generated copy table sections, they are allocated according to the linker's default placement algorithm.

The linker does not allow other types of input sections to be combined with a copy table input section in the same output section. The linker does not allow a copy table section that was created from a partial link session to be used as input to a succeeding link session.