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The LITMUS^RT kernel.

Bjoern Brandenburg

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author	Mathias Krause <minipli@googlemail.com>	2014-04-27 12:51:05 -0400
committer	Jiri Olsa <jolsa@kernel.org>	2014-04-30 11:02:30 -0400
commit	6392b4ebdc1acfbed605d68c437ff5597d0a8d95 (patch)
tree	5a14df4426377d88702769dbb1859fbce076b4ab /lib/string_helpers.c
parent	603940b6b8b1347ec13a628165c00194ebc17ed2 (diff)

perf x86: Fix perf to use non-executable stack, again

arch/x86/tests/regs_load.S is missing the linker note about the stack requirements, therefore making the linker fall back to an executable stack. As this object gets linked against the final perf binary, it'll needlessly end up with an executable stack. Fix this by adding the appropriate linker note. Also add a global linker flag to prevent future regressions, as suggested by Jiri. This way perf won't get an executable stack even if we fail to add the .GNU-stack linker note to future assembler files. Though, doing so might create regressions the other way around, when (statically) linking against libraries needing an executable stack. But, apparently, regressing in that direction is wanted as it is an indicator of poor code quality -- or just missing linker notes. Fixes: 3c8b06f981 ("perf tests x86: Introduce perf_regs_load function") Signed-off-by: Mathias Krause <minipli@googlemail.com> Acked-by: Ingo Molnar <mingo@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1398617466-22749-1-git-send-email-minipli@googlemail.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>

Diffstat (limited to 'lib/string_helpers.c')

0 files changed, 0 insertions, 0 deletions

l ppc">#define ATMEL_US_CHRL_5 (0 << 6) #define ATMEL_US_CHRL_6 (1 << 6) #define ATMEL_US_CHRL_7 (2 << 6) #define ATMEL_US_CHRL_8 (3 << 6) #define ATMEL_US_SYNC (1 << 8) /* Synchronous Mode Select */ #define ATMEL_US_PAR (7 << 9) /* Parity Type */ #define ATMEL_US_PAR_EVEN (0 << 9) #define ATMEL_US_PAR_ODD (1 << 9) #define ATMEL_US_PAR_SPACE (2 << 9) #define ATMEL_US_PAR_MARK (3 << 9) #define ATMEL_US_PAR_NONE (4 << 9) #define ATMEL_US_PAR_MULTI_DROP (6 << 9) #define ATMEL_US_NBSTOP (3 << 12) /* Number of Stop Bits */ #define ATMEL_US_NBSTOP_1 (0 << 12) #define ATMEL_US_NBSTOP_1_5 (1 << 12) #define ATMEL_US_NBSTOP_2 (2 << 12) #define ATMEL_US_CHMODE (3 << 14) /* Channel Mode */ #define ATMEL_US_CHMODE_NORMAL (0 << 14) #define ATMEL_US_CHMODE_ECHO (1 << 14) #define ATMEL_US_CHMODE_LOC_LOOP (2 << 14) #define ATMEL_US_CHMODE_REM_LOOP (3 << 14) #define ATMEL_US_MSBF (1 << 16) /* Bit Order */ #define ATMEL_US_MODE9 (1 << 17) /* 9-bit Character Length */ #define ATMEL_US_CLKO (1 << 18) /* Clock Output Select */ #define ATMEL_US_OVER (1 << 19) /* Oversampling Mode */ #define ATMEL_US_INACK (1 << 20) /* Inhibit Non Acknowledge */ #define ATMEL_US_DSNACK (1 << 21) /* Disable Successive NACK */ #define ATMEL_US_MAX_ITER (7 << 24) /* Max Iterations */ #define ATMEL_US_FILTER (1 << 28) /* Infrared Receive Line Filter */ #define ATMEL_US_IER 0x08 /* Interrupt Enable Register */ #define ATMEL_US_RXRDY (1 << 0) /* Receiver Ready */ #define ATMEL_US_TXRDY (1 << 1) /* Transmitter Ready */ #define ATMEL_US_RXBRK (1 << 2) /* Break Received / End of Break */ #define ATMEL_US_ENDRX (1 << 3) /* End of Receiver Transfer */ #define ATMEL_US_ENDTX (1 << 4) /* End of Transmitter Transfer */ #define ATMEL_US_OVRE (1 << 5) /* Overrun Error */ #define ATMEL_US_FRAME (1 << 6) /* Framing Error */ #define ATMEL_US_PARE (1 << 7) /* Parity Error */ #define ATMEL_US_TIMEOUT (1 << 8) /* Receiver Time-out */ #define ATMEL_US_TXEMPTY (1 << 9) /* Transmitter Empty */ #define ATMEL_US_ITERATION (1 << 10) /* Max number of Repetitions Reached */ #define ATMEL_US_TXBUFE (1 << 11) /* Transmission Buffer Empty */ #define ATMEL_US_RXBUFF (1 << 12) /* Reception Buffer Full */ #define ATMEL_US_NACK (1 << 13) /* Non Acknowledge */ #define ATMEL_US_RIIC (1 << 16) /* Ring Indicator Input Change [AT91RM9200 only] */ #define ATMEL_US_DSRIC (1 << 17) /* Data Set Ready Input Change [AT91RM9200 only] */ #define ATMEL_US_DCDIC (1 << 18) /* Data Carrier Detect Input Change [AT91RM9200 only] */ #define ATMEL_US_CTSIC (1 << 19) /* Clear to Send Input Change */ #define ATMEL_US_RI (1 << 20) /* RI */ #define ATMEL_US_DSR (1 << 21) /* DSR */ #define ATMEL_US_DCD (1 << 22) /* DCD */ #define ATMEL_US_CTS (1 << 23) /* CTS */ #define ATMEL_US_IDR 0x0c /* Interrupt Disable Register */ #define ATMEL_US_IMR 0x10 /* Interrupt Mask Register */ #define ATMEL_US_CSR 0x14 /* Channel Status Register */ #define ATMEL_US_RHR 0x18 /* Receiver Holding Register */ #define ATMEL_US_THR 0x1c /* Transmitter Holding Register */ #define ATMEL_US_SYNH (1 << 15) /* Transmit/Receive Sync [AT91SAM9261 only] */ #define ATMEL_US_BRGR 0x20 /* Baud Rate Generator Register */ #define ATMEL_US_CD (0xffff << 0) /* Clock Divider */ #define ATMEL_US_RTOR 0x24 /* Receiver Time-out Register */ #define ATMEL_US_TO (0xffff << 0) /* Time-out Value */ #define ATMEL_US_TTGR 0x28 /* Transmitter Timeguard Register */ #define ATMEL_US_TG (0xff << 0) /* Timeguard Value */ #define ATMEL_US_FIDI 0x40 /* FI DI Ratio Register */ #define ATMEL_US_NER 0x44 /* Number of Errors Register */ #define ATMEL_US_IF 0x4c /* IrDA Filter Register */ #endif