diff options
Diffstat (limited to 'samples/ftrace/ftrace-direct-too.c')
| -rw-r--r-- | samples/ftrace/ftrace-direct-too.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/samples/ftrace/ftrace-direct-too.c b/samples/ftrace/ftrace-direct-too.c index 3f0079c9bd6f..b97e5ed46233 100644 --- a/samples/ftrace/ftrace-direct-too.c +++ b/samples/ftrace/ftrace-direct-too.c @@ -3,6 +3,10 @@ #include <linux/mm.h> /* for handle_mm_fault() */ #include <linux/ftrace.h> +#include <asm/asm-offsets.h> + +extern void my_direct_func(struct vm_area_struct *vma, + unsigned long address, unsigned int flags); void my_direct_func(struct vm_area_struct *vma, unsigned long address, unsigned int flags) @@ -13,6 +17,8 @@ void my_direct_func(struct vm_area_struct *vma, extern void my_tramp(void *); +#ifdef CONFIG_X86_64 + asm ( " .pushsection .text, \"ax\", @progbits\n" " .type my_tramp, @function\n" @@ -33,6 +39,31 @@ asm ( " .popsection\n" ); +#endif /* CONFIG_X86_64 */ + +#ifdef CONFIG_S390 + +asm ( +" .pushsection .text, \"ax\", @progbits\n" +" .type my_tramp, @function\n" +" .globl my_tramp\n" +" my_tramp:" +" lgr %r1,%r15\n" +" stmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" stg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" aghi %r15,"__stringify(-STACK_FRAME_OVERHEAD)"\n" +" stg %r1,"__stringify(__SF_BACKCHAIN)"(%r15)\n" +" brasl %r14,my_direct_func\n" +" aghi %r15,"__stringify(STACK_FRAME_OVERHEAD)"\n" +" lmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" lg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" lgr %r1,%r0\n" +" br %r1\n" +" .size my_tramp, .-my_tramp\n" +" .popsection\n" +); + +#endif /* CONFIG_S390 */ static int __init ftrace_direct_init(void) { |