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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-06 08:58:59 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-06 08:58:59 -0400 |
| commit | 194d6ad32e1eef433c61040385dcfd98e6fe2ef9 (patch) | |
| tree | 4591bc4c5a1eac2196ef905b8f30629a0cb530e6 /arch/arm64/kernel | |
| parent | a157b3aaa44829998d5a079174df989e5d8c20ff (diff) | |
| parent | 747a70e60b7234e8fd9c35dd2f2db10ac1db231d (diff) | |
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
- fix HugeTLB leak due to CoW and PTE_RDONLY mismatch
- avoid accessing unmapped FDT fields when checking validity
- correctly account for vDSO AUX entry in ARCH_DLINFO
- fix kallsyms with absolute expressions in linker script
- kill unnecessary symbol-based relocs in vmlinux
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Fix copy-on-write referencing in HugeTLB
arm64: mm: avoid fdt_check_header() before the FDT is fully mapped
arm64: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
arm64: relocatable: suppress R_AARCH64_ABS64 relocations in vmlinux
arm64: vmlinux.lds: make __rela_offset and __dynsym_offset ABSOLUTE
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/head.S | 21 | ||||
| -rw-r--r-- | arch/arm64/kernel/vmlinux.lds.S | 13 |
2 files changed, 5 insertions, 29 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 2c6e598a94dc..b77f58355da1 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -781,40 +781,25 @@ __primary_switch: * Iterate over each entry in the relocation table, and apply the * relocations in place. */ - ldr w8, =__dynsym_offset // offset to symbol table ldr w9, =__rela_offset // offset to reloc table ldr w10, =__rela_size // size of reloc table mov_q x11, KIMAGE_VADDR // default virtual offset add x11, x11, x23 // actual virtual offset - add x8, x8, x11 // __va(.dynsym) add x9, x9, x11 // __va(.rela) add x10, x9, x10 // __va(.rela) + sizeof(.rela) 0: cmp x9, x10 - b.hs 2f + b.hs 1f ldp x11, x12, [x9], #24 ldr x13, [x9, #-8] cmp w12, #R_AARCH64_RELATIVE - b.ne 1f + b.ne 0b add x13, x13, x23 // relocate str x13, [x11, x23] b 0b -1: cmp w12, #R_AARCH64_ABS64 - b.ne 0b - add x12, x12, x12, lsl #1 // symtab offset: 24x top word - add x12, x8, x12, lsr #(32 - 3) // ... shifted into bottom word - ldrsh w14, [x12, #6] // Elf64_Sym::st_shndx - ldr x15, [x12, #8] // Elf64_Sym::st_value - cmp w14, #-0xf // SHN_ABS (0xfff1) ? - add x14, x15, x23 // relocate - csel x15, x14, x15, ne - add x15, x13, x15 - str x15, [x11, x23] - b 0b - -2: +1: #endif ldr x8, =__primary_switched br x8 diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index 89d6e177ecbd..659963d40bb4 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -103,6 +103,7 @@ SECTIONS *(.discard) *(.discard.*) *(.interp .dynamic) + *(.dynsym .dynstr .hash) } . = KIMAGE_VADDR + TEXT_OFFSET; @@ -174,19 +175,9 @@ SECTIONS .rela : ALIGN(8) { *(.rela .rela*) } - .dynsym : ALIGN(8) { - *(.dynsym) - } - .dynstr : { - *(.dynstr) - } - .hash : { - *(.hash) - } - __rela_offset = ADDR(.rela) - KIMAGE_VADDR; + __rela_offset = ABSOLUTE(ADDR(.rela) - KIMAGE_VADDR); __rela_size = SIZEOF(.rela); - __dynsym_offset = ADDR(.dynsym) - KIMAGE_VADDR; . = ALIGN(SEGMENT_ALIGN); __init_end = .; |