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| author | Rich Felker <dalias@aerifal.cx> | 2012-11-16 22:22:34 -0500 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-11-16 22:22:34 -0500 |
| commit | a4db94ab78db29eddc957879251f3e0bc7ffb571 (patch) | |
| tree | 400b05bdf99da781434c588eb56e40baef733ad6 /src | |
| parent | 7718e7cce5730265f2707fe378ec263b4c35624d (diff) | |
| download | musl-a4db94ab78db29eddc957879251f3e0bc7ffb571.tar.gz | |
dynamic linking support for powerpc
incomplete but at least partly working. requires all files to be
compiled in the new "secure" plt model, not the old one that put plt
code in the data segment. TLS is untested but may work. invoking the
dynamic linker explicitly to load a program does not yet handle argv
correctly.
Diffstat (limited to 'src')
| -rw-r--r-- | src/ldso/powerpc/start.s | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/src/ldso/powerpc/start.s b/src/ldso/powerpc/start.s index ac2c20c8..08b5979a 100644 --- a/src/ldso/powerpc/start.s +++ b/src/ldso/powerpc/start.s @@ -1,22 +1,21 @@ -# FIXME : does not work, the small data array needs to be relocated. -# see elfspec_ppc.pdf, page 76-84 .global _start .type _start,@function _start: - mr 9, 1 # Save the original stack pointer. - clrrwi 1, 1, 4 # Align the stack to 16 bytes. - lis 13, _SDA_BASE_@ha # r13 points to the small data area. - addi 13, 13, _SDA_BASE_@l - li 0, 0 # Zero the frame pointer. - lwz 3, 0(9) # and argc... - addi 4, 9, 4 # and argv ... - mtlr 0 # Clear the link register. - # Go to the musl dynamic linker entry point. + bl 1f +2: .long _DYNAMIC-2b +1: mflr 5 + lwz 0, 0(5) + add 5, 0, 5 + lwz 3, 0(1) + addi 4, 1, 4 + addi 1, 1, -16 + bl __reloc_self + + lwz 3, 16(1) + addi 4, 1, 20 bl __dynlink - cmpi 4, 0, 3, 1 # Check for a 1. - bne 4, . # Stay here - mtlr 3 # Set the link address... + addi 1, 1, 16 + + mtlr 3 li 3, 0 - blr # and go. - .end _start - .size _start, .-_start + blr |