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| author | Linux Build Service Account <lnxbuild@localhost> | 2016-10-26 13:13:25 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2016-10-26 13:13:24 -0700 |
| commit | bcd8ec9210c9048c14d934e16267ba79a894db09 (patch) | |
| tree | 7e3f49424f21431eab08f679ea6213d6dfa32d1c /arch/arm64/include/asm/assembler.h | |
| parent | b12304a53614f77f37dd87b470ae76084e768966 (diff) | |
| parent | 617229a3e9400c58b578077ff6f81d2f25a1f5ff (diff) | |
Merge "Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4"
Diffstat (limited to 'arch/arm64/include/asm/assembler.h')
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index 09f13a96941b..fcaf3cce639a 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -106,12 +106,19 @@ dmb \opt .endm +/* + * Emit an entry into the exception table + */ + .macro _asm_extable, from, to + .pushsection __ex_table, "a" + .align 3 + .long (\from - .), (\to - .) + .popsection + .endm + #define USER(l, x...) \ 9999: x; \ - .section __ex_table,"a"; \ - .align 3; \ - .quad 9999b,l; \ - .previous + _asm_extable 9999b, l /* * Register aliases. @@ -205,6 +212,17 @@ lr .req x30 // link register str \src, [\tmp, :lo12:\sym] .endm + /* + * @sym: The name of the per-cpu variable + * @reg: Result of per_cpu(sym, smp_processor_id()) + * @tmp: scratch register + */ + .macro this_cpu_ptr, sym, reg, tmp + adr_l \reg, \sym + mrs \tmp, tpidr_el1 + add \reg, \reg, \tmp + .endm + /* * Annotate a function as position independent, i.e., safe to be called before * the kernel virtual mapping is activated. @@ -216,4 +234,15 @@ lr .req x30 // link register .size __pi_##x, . - x; \ ENDPROC(x) + /* + * Emit a 64-bit absolute little endian symbol reference in a way that + * ensures that it will be resolved at build time, even when building a + * PIE binary. This requires cooperation from the linker script, which + * must emit the lo32/hi32 halves individually. + */ + .macro le64sym, sym + .long \sym\()_lo32 + .long \sym\()_hi32 + .endm + #endif /* __ASM_ASSEMBLER_H */ |