perf script: Support 32bit code under 64bit OS with capstone

Use the DSO to resolve whether an IP is 32bit or 64bit and use that to
configure capstone to the correct mode. This allows to correctly
disassemble 32bit code under a 64bit OS.

  % cat > loop.c
  volatile int var;
  int main(void)
  {
  	int i;
  	for (i = 0; i < 100000; i++)
  		var++;
  }
  % gcc -m32 -o loop loop.c
  % perf record -e cycles:u ./loop
  % perf script -F +disasm
    loop   82665 1833176.618023:      1 cycles:u:   f7eed500 _start+0x0 (/usr/lib/ld-linux.so.2)   movl %esp, %eax
    loop   82665 1833176.618029:      1 cycles:u:   f7eed500 _start+0x0 (/usr/lib/ld-linux.so.2)   movl %esp, %eax
    loop   82665 1833176.618031:      7 cycles:u:   f7eed500 _start+0x0 (/usr/lib/ld-linux.so.2)   movl %esp, %eax
    loop   82665 1833176.618034:     91 cycles:u:   f7eed500 _start+0x0 (/usr/lib/ld-linux.so.2)   movl %esp, %eax
    loop   82665 1833176.618036:   1242 cycles:u:   f7eed500 _start+0x0 (/usr/lib/ld-linux.so.2)   movl %esp, %eax

Reviewed-by: Adrian Hunter <[email protected]>
Acked-by: Thomas Richter <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions