Texas Instruments TMS320C54x, User Manual

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Symbol Table Structure and Content
A-20
Table A–13. Special Symbols and Their Storage Classes
Special
Symbol
Restricted to This
Storage Class Special
Symbol
Restricted to This
Storage Class
.file C_FILE .eos C_EOS
.bb C_BLOCK .text C_STAT
.eb C_BLOCK .data C_STAT
.bf C_FCN .bss C_STAT
.ef C_FCN
A.7.5 Symbol Values
Bytes 8–11 of a symbol table entry indicate a symbol’s value. A symbol’s value
depends on the symbol’s storage class; Table A–14 summarizes the storage
classes and related values.
Table A–14. Symbol Values and Storage Classes
Storage Class Value Description Storage Class Value Description
C_AUTO Stack offset in bits C_UNTAG 0
C_EXT Relocatable address C_TPDEF 0
C_STAT Relocatable address C_ENTAG 0
C_REG Register number C_MOE Enumeration value
C_LABEL Relocatable address C_REGPARM Register number
C_MOS Offset in bits C_FIELD Bit displacement
C_ARG Stack offset in bits C_BLOCK Relocatable address
C_STRTAG 0 C_FCN Relocatable address
C_MOU Offset in bits C_FILE 0
If a symbol’s storage class is C_FILE, the symbol’s value is a pointer to the next
.file symbol. Thus, the .file symbols form a one-way linked list in the symbol
table. When there are no more .file symbols, the final .file symbol points back
to the first .file symbol in the symbol table.
The value of a relocatable symbol is its virtual address. When the linker
relocates a section, the value of a relocatable symbol changes accordingly.