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-rw-r--r--ANDROID_3.4.5/scripts/recordmcount.h553
1 files changed, 0 insertions, 553 deletions
diff --git a/ANDROID_3.4.5/scripts/recordmcount.h b/ANDROID_3.4.5/scripts/recordmcount.h
deleted file mode 100644
index 54e35c1e..00000000
--- a/ANDROID_3.4.5/scripts/recordmcount.h
+++ /dev/null
@@ -1,553 +0,0 @@
-/*
- * recordmcount.h
- *
- * This code was taken out of recordmcount.c written by
- * Copyright 2009 John F. Reiser <jreiser@BitWagon.com>. All rights reserved.
- *
- * The original code had the same algorithms for both 32bit
- * and 64bit ELF files, but the code was duplicated to support
- * the difference in structures that were used. This
- * file creates a macro of everything that is different between
- * the 64 and 32 bit code, such that by including this header
- * twice we can create both sets of functions by including this
- * header once with RECORD_MCOUNT_64 undefined, and again with
- * it defined.
- *
- * This conversion to macros was done by:
- * Copyright 2010 Steven Rostedt <srostedt@redhat.com>, Red Hat Inc.
- *
- * Licensed under the GNU General Public License, version 2 (GPLv2).
- */
-#undef append_func
-#undef is_fake_mcount
-#undef fn_is_fake_mcount
-#undef MIPS_is_fake_mcount
-#undef mcount_adjust
-#undef sift_rel_mcount
-#undef nop_mcount
-#undef find_secsym_ndx
-#undef __has_rel_mcount
-#undef has_rel_mcount
-#undef tot_relsize
-#undef get_mcountsym
-#undef get_sym_str_and_relp
-#undef do_func
-#undef Elf_Addr
-#undef Elf_Ehdr
-#undef Elf_Shdr
-#undef Elf_Rel
-#undef Elf_Rela
-#undef Elf_Sym
-#undef ELF_R_SYM
-#undef Elf_r_sym
-#undef ELF_R_INFO
-#undef Elf_r_info
-#undef ELF_ST_BIND
-#undef ELF_ST_TYPE
-#undef fn_ELF_R_SYM
-#undef fn_ELF_R_INFO
-#undef uint_t
-#undef _w
-#undef _align
-#undef _size
-
-#ifdef RECORD_MCOUNT_64
-# define append_func append64
-# define sift_rel_mcount sift64_rel_mcount
-# define nop_mcount nop_mcount_64
-# define find_secsym_ndx find64_secsym_ndx
-# define __has_rel_mcount __has64_rel_mcount
-# define has_rel_mcount has64_rel_mcount
-# define tot_relsize tot64_relsize
-# define get_sym_str_and_relp get_sym_str_and_relp_64
-# define do_func do64
-# define get_mcountsym get_mcountsym_64
-# define is_fake_mcount is_fake_mcount64
-# define fn_is_fake_mcount fn_is_fake_mcount64
-# define MIPS_is_fake_mcount MIPS64_is_fake_mcount
-# define mcount_adjust mcount_adjust_64
-# define Elf_Addr Elf64_Addr
-# define Elf_Ehdr Elf64_Ehdr
-# define Elf_Shdr Elf64_Shdr
-# define Elf_Rel Elf64_Rel
-# define Elf_Rela Elf64_Rela
-# define Elf_Sym Elf64_Sym
-# define ELF_R_SYM ELF64_R_SYM
-# define Elf_r_sym Elf64_r_sym
-# define ELF_R_INFO ELF64_R_INFO
-# define Elf_r_info Elf64_r_info
-# define ELF_ST_BIND ELF64_ST_BIND
-# define ELF_ST_TYPE ELF64_ST_TYPE
-# define fn_ELF_R_SYM fn_ELF64_R_SYM
-# define fn_ELF_R_INFO fn_ELF64_R_INFO
-# define uint_t uint64_t
-# define _w w8
-# define _align 7u
-# define _size 8
-#else
-# define append_func append32
-# define sift_rel_mcount sift32_rel_mcount
-# define nop_mcount nop_mcount_32
-# define find_secsym_ndx find32_secsym_ndx
-# define __has_rel_mcount __has32_rel_mcount
-# define has_rel_mcount has32_rel_mcount
-# define tot_relsize tot32_relsize
-# define get_sym_str_and_relp get_sym_str_and_relp_32
-# define do_func do32
-# define get_mcountsym get_mcountsym_32
-# define is_fake_mcount is_fake_mcount32
-# define fn_is_fake_mcount fn_is_fake_mcount32
-# define MIPS_is_fake_mcount MIPS32_is_fake_mcount
-# define mcount_adjust mcount_adjust_32
-# define Elf_Addr Elf32_Addr
-# define Elf_Ehdr Elf32_Ehdr
-# define Elf_Shdr Elf32_Shdr
-# define Elf_Rel Elf32_Rel
-# define Elf_Rela Elf32_Rela
-# define Elf_Sym Elf32_Sym
-# define ELF_R_SYM ELF32_R_SYM
-# define Elf_r_sym Elf32_r_sym
-# define ELF_R_INFO ELF32_R_INFO
-# define Elf_r_info Elf32_r_info
-# define ELF_ST_BIND ELF32_ST_BIND
-# define ELF_ST_TYPE ELF32_ST_TYPE
-# define fn_ELF_R_SYM fn_ELF32_R_SYM
-# define fn_ELF_R_INFO fn_ELF32_R_INFO
-# define uint_t uint32_t
-# define _w w
-# define _align 3u
-# define _size 4
-#endif
-
-/* Functions and pointers that do_file() may override for specific e_machine. */
-static int fn_is_fake_mcount(Elf_Rel const *rp)
-{
- return 0;
-}
-static int (*is_fake_mcount)(Elf_Rel const *rp) = fn_is_fake_mcount;
-
-static uint_t fn_ELF_R_SYM(Elf_Rel const *rp)
-{
- return ELF_R_SYM(_w(rp->r_info));
-}
-static uint_t (*Elf_r_sym)(Elf_Rel const *rp) = fn_ELF_R_SYM;
-
-static void fn_ELF_R_INFO(Elf_Rel *const rp, unsigned sym, unsigned type)
-{
- rp->r_info = _w(ELF_R_INFO(sym, type));
-}
-static void (*Elf_r_info)(Elf_Rel *const rp, unsigned sym, unsigned type) = fn_ELF_R_INFO;
-
-static int mcount_adjust = 0;
-
-/*
- * MIPS mcount long call has 2 _mcount symbols, only the position of the 1st
- * _mcount symbol is needed for dynamic function tracer, with it, to disable
- * tracing(ftrace_make_nop), the instruction in the position is replaced with
- * the "b label" instruction, to enable tracing(ftrace_make_call), replace the
- * instruction back. So, here, we set the 2nd one as fake and filter it.
- *
- * c: 3c030000 lui v1,0x0 <--> b label
- * c: R_MIPS_HI16 _mcount
- * c: R_MIPS_NONE *ABS*
- * c: R_MIPS_NONE *ABS*
- * 10: 64630000 daddiu v1,v1,0
- * 10: R_MIPS_LO16 _mcount
- * 10: R_MIPS_NONE *ABS*
- * 10: R_MIPS_NONE *ABS*
- * 14: 03e0082d move at,ra
- * 18: 0060f809 jalr v1
- * label:
- */
-#define MIPS_FAKEMCOUNT_OFFSET 4
-
-static int MIPS_is_fake_mcount(Elf_Rel const *rp)
-{
- static Elf_Addr old_r_offset;
- Elf_Addr current_r_offset = _w(rp->r_offset);
- int is_fake;
-
- is_fake = old_r_offset &&
- (current_r_offset - old_r_offset == MIPS_FAKEMCOUNT_OFFSET);
- old_r_offset = current_r_offset;
-
- return is_fake;
-}
-
-/* Append the new shstrtab, Elf_Shdr[], __mcount_loc and its relocations. */
-static void append_func(Elf_Ehdr *const ehdr,
- Elf_Shdr *const shstr,
- uint_t const *const mloc0,
- uint_t const *const mlocp,
- Elf_Rel const *const mrel0,
- Elf_Rel const *const mrelp,
- unsigned int const rel_entsize,
- unsigned int const symsec_sh_link)
-{
- /* Begin constructing output file */
- Elf_Shdr mcsec;
- char const *mc_name = (sizeof(Elf_Rela) == rel_entsize)
- ? ".rela__mcount_loc"
- : ".rel__mcount_loc";
- unsigned const old_shnum = w2(ehdr->e_shnum);
- uint_t const old_shoff = _w(ehdr->e_shoff);
- uint_t const old_shstr_sh_size = _w(shstr->sh_size);
- uint_t const old_shstr_sh_offset = _w(shstr->sh_offset);
- uint_t t = 1 + strlen(mc_name) + _w(shstr->sh_size);
- uint_t new_e_shoff;
-
- shstr->sh_size = _w(t);
- shstr->sh_offset = _w(sb.st_size);
- t += sb.st_size;
- t += (_align & -t); /* word-byte align */
- new_e_shoff = t;
-
- /* body for new shstrtab */
- ulseek(fd_map, sb.st_size, SEEK_SET);
- uwrite(fd_map, old_shstr_sh_offset + (void *)ehdr, old_shstr_sh_size);
- uwrite(fd_map, mc_name, 1 + strlen(mc_name));
-
- /* old(modified) Elf_Shdr table, word-byte aligned */
- ulseek(fd_map, t, SEEK_SET);
- t += sizeof(Elf_Shdr) * old_shnum;
- uwrite(fd_map, old_shoff + (void *)ehdr,
- sizeof(Elf_Shdr) * old_shnum);
-
- /* new sections __mcount_loc and .rel__mcount_loc */
- t += 2*sizeof(mcsec);
- mcsec.sh_name = w((sizeof(Elf_Rela) == rel_entsize) + strlen(".rel")
- + old_shstr_sh_size);
- mcsec.sh_type = w(SHT_PROGBITS);
- mcsec.sh_flags = _w(SHF_ALLOC);
- mcsec.sh_addr = 0;
- mcsec.sh_offset = _w(t);
- mcsec.sh_size = _w((void *)mlocp - (void *)mloc0);
- mcsec.sh_link = 0;
- mcsec.sh_info = 0;
- mcsec.sh_addralign = _w(_size);
- mcsec.sh_entsize = _w(_size);
- uwrite(fd_map, &mcsec, sizeof(mcsec));
-
- mcsec.sh_name = w(old_shstr_sh_size);
- mcsec.sh_type = (sizeof(Elf_Rela) == rel_entsize)
- ? w(SHT_RELA)
- : w(SHT_REL);
- mcsec.sh_flags = 0;
- mcsec.sh_addr = 0;
- mcsec.sh_offset = _w((void *)mlocp - (void *)mloc0 + t);
- mcsec.sh_size = _w((void *)mrelp - (void *)mrel0);
- mcsec.sh_link = w(symsec_sh_link);
- mcsec.sh_info = w(old_shnum);
- mcsec.sh_addralign = _w(_size);
- mcsec.sh_entsize = _w(rel_entsize);
- uwrite(fd_map, &mcsec, sizeof(mcsec));
-
- uwrite(fd_map, mloc0, (void *)mlocp - (void *)mloc0);
- uwrite(fd_map, mrel0, (void *)mrelp - (void *)mrel0);
-
- ehdr->e_shoff = _w(new_e_shoff);
- ehdr->e_shnum = w2(2 + w2(ehdr->e_shnum)); /* {.rel,}__mcount_loc */
- ulseek(fd_map, 0, SEEK_SET);
- uwrite(fd_map, ehdr, sizeof(*ehdr));
-}
-
-static unsigned get_mcountsym(Elf_Sym const *const sym0,
- Elf_Rel const *relp,
- char const *const str0)
-{
- unsigned mcountsym = 0;
-
- Elf_Sym const *const symp =
- &sym0[Elf_r_sym(relp)];
- char const *symname = &str0[w(symp->st_name)];
- char const *mcount = gpfx == '_' ? "_mcount" : "mcount";
-
- if (symname[0] == '.')
- ++symname; /* ppc64 hack */
- if (strcmp(mcount, symname) == 0 ||
- (altmcount && strcmp(altmcount, symname) == 0))
- mcountsym = Elf_r_sym(relp);
-
- return mcountsym;
-}
-
-static void get_sym_str_and_relp(Elf_Shdr const *const relhdr,
- Elf_Ehdr const *const ehdr,
- Elf_Sym const **sym0,
- char const **str0,
- Elf_Rel const **relp)
-{
- Elf_Shdr *const shdr0 = (Elf_Shdr *)(_w(ehdr->e_shoff)
- + (void *)ehdr);
- unsigned const symsec_sh_link = w(relhdr->sh_link);
- Elf_Shdr const *const symsec = &shdr0[symsec_sh_link];
- Elf_Shdr const *const strsec = &shdr0[w(symsec->sh_link)];
- Elf_Rel const *const rel0 = (Elf_Rel const *)(_w(relhdr->sh_offset)
- + (void *)ehdr);
-
- *sym0 = (Elf_Sym const *)(_w(symsec->sh_offset)
- + (void *)ehdr);
-
- *str0 = (char const *)(_w(strsec->sh_offset)
- + (void *)ehdr);
-
- *relp = rel0;
-}
-
-/*
- * Look at the relocations in order to find the calls to mcount.
- * Accumulate the section offsets that are found, and their relocation info,
- * onto the end of the existing arrays.
- */
-static uint_t *sift_rel_mcount(uint_t *mlocp,
- unsigned const offbase,
- Elf_Rel **const mrelpp,
- Elf_Shdr const *const relhdr,
- Elf_Ehdr const *const ehdr,
- unsigned const recsym,
- uint_t const recval,
- unsigned const reltype)
-{
- uint_t *const mloc0 = mlocp;
- Elf_Rel *mrelp = *mrelpp;
- Elf_Sym const *sym0;
- char const *str0;
- Elf_Rel const *relp;
- unsigned rel_entsize = _w(relhdr->sh_entsize);
- unsigned const nrel = _w(relhdr->sh_size) / rel_entsize;
- unsigned mcountsym = 0;
- unsigned t;
-
- get_sym_str_and_relp(relhdr, ehdr, &sym0, &str0, &relp);
-
- for (t = nrel; t; --t) {
- if (!mcountsym)
- mcountsym = get_mcountsym(sym0, relp, str0);
-
- if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
- uint_t const addend =
- _w(_w(relp->r_offset) - recval + mcount_adjust);
- mrelp->r_offset = _w(offbase
- + ((void *)mlocp - (void *)mloc0));
- Elf_r_info(mrelp, recsym, reltype);
- if (rel_entsize == sizeof(Elf_Rela)) {
- ((Elf_Rela *)mrelp)->r_addend = addend;
- *mlocp++ = 0;
- } else
- *mlocp++ = addend;
-
- mrelp = (Elf_Rel *)(rel_entsize + (void *)mrelp);
- }
- relp = (Elf_Rel const *)(rel_entsize + (void *)relp);
- }
- *mrelpp = mrelp;
- return mlocp;
-}
-
-/*
- * Read the relocation table again, but this time its called on sections
- * that are not going to be traced. The mcount calls here will be converted
- * into nops.
- */
-static void nop_mcount(Elf_Shdr const *const relhdr,
- Elf_Ehdr const *const ehdr,
- const char *const txtname)
-{
- Elf_Shdr *const shdr0 = (Elf_Shdr *)(_w(ehdr->e_shoff)
- + (void *)ehdr);
- Elf_Sym const *sym0;
- char const *str0;
- Elf_Rel const *relp;
- Elf_Shdr const *const shdr = &shdr0[w(relhdr->sh_info)];
- unsigned rel_entsize = _w(relhdr->sh_entsize);
- unsigned const nrel = _w(relhdr->sh_size) / rel_entsize;
- unsigned mcountsym = 0;
- unsigned t;
- int once = 0;
-
- get_sym_str_and_relp(relhdr, ehdr, &sym0, &str0, &relp);
-
- for (t = nrel; t; --t) {
- int ret = -1;
-
- if (!mcountsym)
- mcountsym = get_mcountsym(sym0, relp, str0);
-
- if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
- if (make_nop)
- ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
- if (warn_on_notrace_sect && !once) {
- printf("Section %s has mcount callers being ignored\n",
- txtname);
- once = 1;
- /* just warn? */
- if (!make_nop)
- return;
- }
- }
-
- /*
- * If we successfully removed the mcount, mark the relocation
- * as a nop (don't do anything with it).
- */
- if (!ret) {
- Elf_Rel rel;
- rel = *(Elf_Rel *)relp;
- Elf_r_info(&rel, Elf_r_sym(relp), rel_type_nop);
- ulseek(fd_map, (void *)relp - (void *)ehdr, SEEK_SET);
- uwrite(fd_map, &rel, sizeof(rel));
- }
- relp = (Elf_Rel const *)(rel_entsize + (void *)relp);
- }
-}
-
-
-/*
- * Find a symbol in the given section, to be used as the base for relocating
- * the table of offsets of calls to mcount. A local or global symbol suffices,
- * but avoid a Weak symbol because it may be overridden; the change in value
- * would invalidate the relocations of the offsets of the calls to mcount.
- * Often the found symbol will be the unnamed local symbol generated by
- * GNU 'as' for the start of each section. For example:
- * Num: Value Size Type Bind Vis Ndx Name
- * 2: 00000000 0 SECTION LOCAL DEFAULT 1
- */
-static unsigned find_secsym_ndx(unsigned const txtndx,
- char const *const txtname,
- uint_t *const recvalp,
- Elf_Shdr const *const symhdr,
- Elf_Ehdr const *const ehdr)
-{
- Elf_Sym const *const sym0 = (Elf_Sym const *)(_w(symhdr->sh_offset)
- + (void *)ehdr);
- unsigned const nsym = _w(symhdr->sh_size) / _w(symhdr->sh_entsize);
- Elf_Sym const *symp;
- unsigned t;
-
- for (symp = sym0, t = nsym; t; --t, ++symp) {
- unsigned int const st_bind = ELF_ST_BIND(symp->st_info);
-
- if (txtndx == w2(symp->st_shndx)
- /* avoid STB_WEAK */
- && (STB_LOCAL == st_bind || STB_GLOBAL == st_bind)) {
- /* function symbols on ARM have quirks, avoid them */
- if (w2(ehdr->e_machine) == EM_ARM
- && ELF_ST_TYPE(symp->st_info) == STT_FUNC)
- continue;
-
- *recvalp = _w(symp->st_value);
- return symp - sym0;
- }
- }
- fprintf(stderr, "Cannot find symbol for section %d: %s.\n",
- txtndx, txtname);
- fail_file();
-}
-
-
-/* Evade ISO C restriction: no declaration after statement in has_rel_mcount. */
-static char const *
-__has_rel_mcount(Elf_Shdr const *const relhdr, /* is SHT_REL or SHT_RELA */
- Elf_Shdr const *const shdr0,
- char const *const shstrtab,
- char const *const fname)
-{
- /* .sh_info depends on .sh_type == SHT_REL[,A] */
- Elf_Shdr const *const txthdr = &shdr0[w(relhdr->sh_info)];
- char const *const txtname = &shstrtab[w(txthdr->sh_name)];
-
- if (strcmp("__mcount_loc", txtname) == 0) {
- fprintf(stderr, "warning: __mcount_loc already exists: %s\n",
- fname);
- succeed_file();
- }
- if (w(txthdr->sh_type) != SHT_PROGBITS ||
- !(_w(txthdr->sh_flags) & SHF_EXECINSTR))
- return NULL;
- return txtname;
-}
-
-static char const *has_rel_mcount(Elf_Shdr const *const relhdr,
- Elf_Shdr const *const shdr0,
- char const *const shstrtab,
- char const *const fname)
-{
- if (w(relhdr->sh_type) != SHT_REL && w(relhdr->sh_type) != SHT_RELA)
- return NULL;
- return __has_rel_mcount(relhdr, shdr0, shstrtab, fname);
-}
-
-
-static unsigned tot_relsize(Elf_Shdr const *const shdr0,
- unsigned nhdr,
- const char *const shstrtab,
- const char *const fname)
-{
- unsigned totrelsz = 0;
- Elf_Shdr const *shdrp = shdr0;
- char const *txtname;
-
- for (; nhdr; --nhdr, ++shdrp) {
- txtname = has_rel_mcount(shdrp, shdr0, shstrtab, fname);
- if (txtname && is_mcounted_section_name(txtname))
- totrelsz += _w(shdrp->sh_size);
- }
- return totrelsz;
-}
-
-
-/* Overall supervision for Elf32 ET_REL file. */
-static void
-do_func(Elf_Ehdr *const ehdr, char const *const fname, unsigned const reltype)
-{
- Elf_Shdr *const shdr0 = (Elf_Shdr *)(_w(ehdr->e_shoff)
- + (void *)ehdr);
- unsigned const nhdr = w2(ehdr->e_shnum);
- Elf_Shdr *const shstr = &shdr0[w2(ehdr->e_shstrndx)];
- char const *const shstrtab = (char const *)(_w(shstr->sh_offset)
- + (void *)ehdr);
-
- Elf_Shdr const *relhdr;
- unsigned k;
-
- /* Upper bound on space: assume all relevant relocs are for mcount. */
- unsigned const totrelsz = tot_relsize(shdr0, nhdr, shstrtab, fname);
- Elf_Rel *const mrel0 = umalloc(totrelsz);
- Elf_Rel * mrelp = mrel0;
-
- /* 2*sizeof(address) <= sizeof(Elf_Rel) */
- uint_t *const mloc0 = umalloc(totrelsz>>1);
- uint_t * mlocp = mloc0;
-
- unsigned rel_entsize = 0;
- unsigned symsec_sh_link = 0;
-
- for (relhdr = shdr0, k = nhdr; k; --k, ++relhdr) {
- char const *const txtname = has_rel_mcount(relhdr, shdr0,
- shstrtab, fname);
- if (txtname && is_mcounted_section_name(txtname)) {
- uint_t recval = 0;
- unsigned const recsym = find_secsym_ndx(
- w(relhdr->sh_info), txtname, &recval,
- &shdr0[symsec_sh_link = w(relhdr->sh_link)],
- ehdr);
-
- rel_entsize = _w(relhdr->sh_entsize);
- mlocp = sift_rel_mcount(mlocp,
- (void *)mlocp - (void *)mloc0, &mrelp,
- relhdr, ehdr, recsym, recval, reltype);
- } else if (txtname && (warn_on_notrace_sect || make_nop)) {
- /*
- * This section is ignored by ftrace, but still
- * has mcount calls. Convert them to nops now.
- */
- nop_mcount(relhdr, ehdr, txtname);
- }
- }
- if (mloc0 != mlocp) {
- append_func(ehdr, shstr, mloc0, mlocp, mrel0, mrelp,
- rel_entsize, symsec_sh_link);
- }
- free(mrel0);
- free(mloc0);
-}
generated by cgit (git 2.34.1) at 2025-02-05 13:42:26 +0000