AMD ATI CTM, Technical Reference Manual

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ATI CTM Guide v. 1.01 © 2006 Advanced Micro Devices, Inc.
46 Executable Files
4.1.3 Program Code Sections
The program executable code is contained within a single .text section of the ELF file with a program header element
of type PT_LOAD:
4.1.4 Program Loading
A binary object to be loaded for execution contains information in addition to the instruction code found in the .text
section of its binary. This information is encoded in seven notes encapsulated in one or more sections of type
SHT_NOTE with program header elements of type PT_NOTE. This information is used to ensure the validity of the
execution environment in CTM with respect to the program being loaded.
The notes are summarized in the following table, and described in detail in the subsections below:
Program Information Note
The Program Information Note is summarized in the following tables. If the object file does not contain a program
information note, the object is ill conditioned and will fail to load:
The DPP Program Information structure (dpp_proginfo) found in the Program Information Note is:
Name Type Flags Section Contents
text SHT_PROGBITS SHF_ALLOC
SHF_EXECINSTR The executable instructions of a program.
Note Description
Program Information Ancillary information used by the loader to set up program.
Inputs Which inputs are referenced in the program.
Outputs Which outputs are referenced in the program.
Conditional Output Whether a conditional output value is written.
Float32 Constants Which FLOAT32 constants are referenced in the program.
Int32 Constants Which INT32 constants are referenced in the program.
Early Program Exit Whether the program contains an early exit command.
Field Size in Bytes Value
namesz 4 8
descsz 4 sizeof(dpp_proginfo)
type 4 ELF_NOTE_ATI_PROGINFO (current value is 1)
name 8 ELF_NOTE_ATI (current value is "ATI DPP")
desc sizeof(dpp_proginfo) The DPP Program Information structure (see below).
Field Type Value Description
Reserved Elf32_Word 0x00000001 Reserved
FG_DEPTH_SRC Elf32_Word per-program A 1 in bit 0 specifies conditional value is exported.
US_CONFIG Elf32_Word per-program A 1 in bit 0 specifies that output writes are uncached.
US_PIXSIZE Elf32_Word per-program Largest register used in the program
US_FC_CTRL Elf32_Word per-program A 1 in bit 31 specifies full flow control functionality