a7f290dad3
This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
117 lines
3.3 KiB
ArmAsm
117 lines
3.3 KiB
ArmAsm
/*
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* This is the infamous ld script for the 64 bits vdso
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* library
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*/
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#include <asm/vdso.h>
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OUTPUT_FORMAT("elf64-powerpc", "elf64-powerpc", "elf64-powerpc")
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OUTPUT_ARCH(powerpc:common64)
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ENTRY(_start)
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SECTIONS
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{
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. = VDSO64_LBASE + SIZEOF_HEADERS;
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.hash : { *(.hash) } :text
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.dynsym : { *(.dynsym) }
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.dynstr : { *(.dynstr) }
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.gnu.version : { *(.gnu.version) }
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.gnu.version_d : { *(.gnu.version_d) }
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.gnu.version_r : { *(.gnu.version_r) }
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.note : { *(.note.*) } :text :note
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. = ALIGN (16);
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.text :
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{
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*(.text .stub .text.* .gnu.linkonce.t.*)
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*(.sfpr .glink)
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} :text
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PROVIDE (__etext = .);
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PROVIDE (_etext = .);
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PROVIDE (etext = .);
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/* Other stuff is appended to the text segment: */
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.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
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.rodata1 : { *(.rodata1) }
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.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
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.eh_frame : { KEEP (*(.eh_frame)) } :text
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.gcc_except_table : { *(.gcc_except_table) }
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.opd ALIGN(8) : { KEEP (*(.opd)) }
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.got ALIGN(8) : { *(.got .toc) }
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.rela.dyn ALIGN(8) : { *(.rela.dyn) }
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.dynamic : { *(.dynamic) } :text :dynamic
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_end = .;
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PROVIDE (end = .);
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/* Stabs debugging sections are here too
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*/
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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/* DWARF debug sectio/ns.
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Symbols in the DWARF debugging sections are relative to the beginning
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of the section so we begin them at 0. */
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/* DWARF 1 */
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.debug 0 : { *(.debug) }
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.line 0 : { *(.line) }
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/* GNU DWARF 1 extensions */
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.debug_srcinfo 0 : { *(.debug_srcinfo) }
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.debug_sfnames 0 : { *(.debug_sfnames) }
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/* DWARF 1.1 and DWARF 2 */
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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/* DWARF 2 */
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.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_line 0 : { *(.debug_line) }
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.debug_frame 0 : { *(.debug_frame) }
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.debug_str 0 : { *(.debug_str) }
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.debug_loc 0 : { *(.debug_loc) }
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.debug_macinfo 0 : { *(.debug_macinfo) }
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/* SGI/MIPS DWARF 2 extensions */
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.debug_weaknames 0 : { *(.debug_weaknames) }
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.debug_funcnames 0 : { *(.debug_funcnames) }
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.debug_typenames 0 : { *(.debug_typenames) }
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.debug_varnames 0 : { *(.debug_varnames) }
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/DISCARD/ : { *(.note.GNU-stack) }
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/DISCARD/ : { *(.branch_lt) }
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/DISCARD/ : { *(.data .data.* .gnu.linkonce.d.*) }
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/DISCARD/ : { *(.bss .sbss .dynbss .dynsbss) }
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}
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PHDRS
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{
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text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
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note PT_NOTE FLAGS(4); /* PF_R */
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dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
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eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */
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}
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/*
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* This controls what symbols we export from the DSO.
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*/
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VERSION
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{
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VDSO_VERSION_STRING {
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global:
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__kernel_datapage_offset; /* Has to be there for the kernel to find */
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__kernel_get_syscall_map;
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__kernel_gettimeofday;
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__kernel_clock_gettime;
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__kernel_clock_getres;
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__kernel_get_tbfreq;
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__kernel_sync_dicache;
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__kernel_sync_dicache_p5;
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__kernel_sigtramp_rt64;
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local: *;
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};
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}
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