1. 07 3月, 2009 2 次提交
  2. 06 3月, 2009 1 次提交
  3. 05 3月, 2009 2 次提交
    • U
      [ARM] 5418/1: restore lr before leaving mcount · d4cc510c
      Uwe Kleine-König 提交于
      gcc seems to expect that lr isn't clobbered by mcount, because for a
      function starting with:
      
      	static int func(void)
      	{
      		void *ra = __builtin_return_address(0);
      
      		printk(KERN_EMERG "__builtin_return_address(0) = %pS\n", ra)
      
      		...
      
      the following assembler is generated by gcc 4.3.2:
      
      	   0:   e1a0c00d        mov     ip, sp
      	   4:   e92dd810        push    {r4, fp, ip, lr, pc}
      	   8:   e24cb004        sub     fp, ip, #4      ; 0x4
      	   c:   ebfffffe        bl      0 <mcount>
      	  10:   e59f0034        ldr     r0, [pc, #52]
      	  14:   e1a0100e        mov     r1, lr
      	  18:   ebfffffe        bl      0 <printk>
      
      Without this patch obviously __builtin_return_address(0) yields
      func+0x10 instead of the return address of the caller.
      
      Note this patch fixes a similar issue for the routines used with dynamic
      ftrace even though this isn't currently selectable for ARM.
      
      Cc: Abhishek Sagar <sagar.abhishek@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
      Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      d4cc510c
    • R
      843e22b0
  4. 04 3月, 2009 13 次提交
  5. 03 3月, 2009 22 次提交