diff options
Diffstat (limited to 'gcc/targhooks.c')
| -rw-r--r-- | gcc/targhooks.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/gcc/targhooks.c b/gcc/targhooks.c index 940deec67f9..6a8fae656d0 100644 --- a/gcc/targhooks.c +++ b/gcc/targhooks.c @@ -73,6 +73,7 @@ along with GCC; see the file COPYING3. If not see #include "calls.h" #include "expr.h" #include "output.h" +#include "common/common-target.h" #include "reload.h" #include "intl.h" #include "opts.h" @@ -1610,6 +1611,51 @@ default_compare_by_pieces_branch_ratio (machine_mode) return 1; } +/* Write PATCH_AREA_SIZE NOPs into the asm outfile FILE around a function + entry. If RECORD_P is true and the target supports named sections, + the location of the NOPs will be recorded in a special object section + called "__patchable_function_entries". This routine may be called + twice per function to put NOPs before and after the function + entry. */ + +void +default_print_patchable_function_entry (FILE *file, + unsigned HOST_WIDE_INT patch_area_size, + bool record_p) +{ + const char *nop_templ = 0; + int code_num; + rtx_insn *my_nop = make_insn_raw (gen_nop ()); + + /* We use the template alone, relying on the (currently sane) assumption + that the NOP template does not have variable operands. */ + code_num = recog_memoized (my_nop); + nop_templ = get_insn_template (code_num, my_nop); + + if (record_p && targetm_common.have_named_sections) + { + char buf[256]; + static int patch_area_number; + section *previous_section = in_section; + + patch_area_number++; + ASM_GENERATE_INTERNAL_LABEL (buf, "LPFE", patch_area_number); + + switch_to_section (get_section ("__patchable_function_entries", + 0, NULL)); + fputs (integer_asm_op (POINTER_SIZE_UNITS, false), file); + assemble_name_raw (file, buf); + fputc ('\n', file); + + switch_to_section (previous_section); + ASM_OUTPUT_LABEL (file, buf); + } + + unsigned i; + for (i = 0; i < patch_area_size; ++i) + fprintf (file, "\t%s\n", nop_templ); +} + bool default_profile_before_prologue (void) { |