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Diffstat (limited to 'c/src/lib/libcpu/powerpc/ppc403/vectors/README')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/ppc403/vectors/README | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/powerpc/ppc403/vectors/README b/c/src/lib/libcpu/powerpc/ppc403/vectors/README new file mode 100644 index 0000000000..02ab163dfd --- /dev/null +++ b/c/src/lib/libcpu/powerpc/ppc403/vectors/README @@ -0,0 +1,21 @@ +The location of the vectors file object is critical. + +From the comments at the head of vectors.s: + + The issue with this file is getting it loaded at the right place. + The first vector MUST be at address 0x????0100. + How this is achieved is dependant on the tool chain. + + However the basic mechanism for ELF assemblers is to create a + section called ".vectors", which will be loaded to an address + between 0x????0000 and 0x????0100 (inclusive) via a link script. + + The basic mechanism for XCOFF assemblers is to place it in the + normal text section, and arrange for this file to be located + at an appropriate position on the linker command line. + + The variable 'PPC_VECTOR_FILE_BASE' must be defined to be the + offset from 0x????0000 to the first location in the file. This + will usually be 0x0000 or 0x0100. + +Andrew Bray 18/8/1995 |