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-rw-r--r--scripts/Kbuild.include11
-rw-r--r--scripts/Kconfig.include8
-rwxr-xr-xscripts/atomic/gen-atomic-fallback.sh31
-rwxr-xr-xscripts/decode_stacktrace.sh5
-rwxr-xr-xscripts/headers_install.sh2
-rw-r--r--scripts/recordmcount.h98
6 files changed, 135 insertions, 20 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 0c3dc983439b..9a15fbf66aa1 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -86,20 +86,21 @@ cc-cross-prefix = $(firstword $(foreach c, $(1), \
$(if $(shell command -v -- $(c)gcc 2>/dev/null), $(c))))
# output directory for tests below
-TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
+TMPOUT = $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_$$$$
# try-run
# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
# Exit code chooses option. "$$TMP" serves as a temporary file and is
# automatically cleaned up.
try-run = $(shell set -e; \
- TMP="$(TMPOUT).$$$$.tmp"; \
- TMPO="$(TMPOUT).$$$$.o"; \
+ TMP=$(TMPOUT)/tmp; \
+ TMPO=$(TMPOUT)/tmp.o; \
+ mkdir -p $(TMPOUT); \
+ trap "rm -rf $(TMPOUT)" EXIT; \
if ($(1)) >/dev/null 2>&1; \
then echo "$(2)"; \
else echo "$(3)"; \
- fi; \
- rm -f "$$TMP" "$$TMPO")
+ fi)
# as-option
# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index c264da2b9b30..a5fe72c504ff 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -25,18 +25,12 @@ failure = $(if-success,$(1),n,y)
# $(cc-option,<flag>)
# Return y if the compiler supports <flag>, n otherwise
-cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -S -x c /dev/null -o /dev/null)
+cc-option = $(success,mkdir .tmp_$$$$; trap "rm -rf .tmp_$$$$" EXIT; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$$$/tmp.o)
# $(ld-option,<flag>)
# Return y if the linker supports <flag>, n otherwise
ld-option = $(success,$(LD) -v $(1))
-# $(as-option,<flag>)
-# /dev/zero is used as output instead of /dev/null as some assembler cribs when
-# both input and output are same. Also both of them have same write behaviour so
-# can be easily substituted.
-as-option = $(success, $(CC) $(CLANG_FLAGS) $(1) -c -x assembler /dev/null -o /dev/zero)
-
# $(as-instr,<instr>)
# Return y if the assembler supports <instr>, n otherwise
as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -)
diff --git a/scripts/atomic/gen-atomic-fallback.sh b/scripts/atomic/gen-atomic-fallback.sh
index 0fd1cf0c2b94..693dfa1de430 100755
--- a/scripts/atomic/gen-atomic-fallback.sh
+++ b/scripts/atomic/gen-atomic-fallback.sh
@@ -58,6 +58,21 @@ cat << EOF
EOF
}
+gen_proto_order_variant()
+{
+ local meta="$1"; shift
+ local pfx="$1"; shift
+ local name="$1"; shift
+ local sfx="$1"; shift
+ local order="$1"; shift
+ local arch="$1"
+ local atomic="$2"
+
+ local basename="${arch}${atomic}_${pfx}${name}${sfx}"
+
+ printf "#define arch_${basename}${order} ${basename}${order}\n"
+}
+
#gen_proto_order_variants(meta, pfx, name, sfx, arch, atomic, int, args...)
gen_proto_order_variants()
{
@@ -72,6 +87,22 @@ gen_proto_order_variants()
local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
+ if [ -z "$arch" ]; then
+ gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
+
+ if meta_has_acquire "${meta}"; then
+ gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
+ fi
+ if meta_has_release "${meta}"; then
+ gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
+ fi
+ if meta_has_relaxed "${meta}"; then
+ gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
+ fi
+
+ echo ""
+ fi
+
# If we don't have relaxed atomics, then we don't bother with ordering fallbacks
# read_acquire and set_release need to be templated, though
if ! meta_has_relaxed "${meta}"; then
diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 13e5fbafdf2f..66a6d511b524 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -27,7 +27,10 @@ parse_symbol() {
elif [[ "${modcache[$module]+isset}" == "isset" ]]; then
local objfile=${modcache[$module]}
else
- [[ $modpath == "" ]] && return
+ if [[ $modpath == "" ]]; then
+ echo "WARNING! Modules path isn't set, but is needed to parse this symbol" >&2
+ return
+ fi
local objfile=$(find "$modpath" -name "${module//_/[-_]}.ko*" -print -quit)
[[ $objfile == "" ]] && return
modcache[$module]=$objfile
diff --git a/scripts/headers_install.sh b/scripts/headers_install.sh
index 955cf3aedf21..224f51012b6e 100755
--- a/scripts/headers_install.sh
+++ b/scripts/headers_install.sh
@@ -11,7 +11,7 @@ then
echo "asm/inline/volatile keywords."
echo
echo "INFILE: header file to operate on"
- echo "OUTFILE: output file which the processed header is writen to"
+ echo "OUTFILE: output file which the processed header is written to"
exit 1
fi
diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index 74eab03e31d4..f9b19524da11 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -29,6 +29,11 @@
#undef has_rel_mcount
#undef tot_relsize
#undef get_mcountsym
+#undef find_symtab
+#undef get_shnum
+#undef set_shnum
+#undef get_shstrndx
+#undef get_symindex
#undef get_sym_str_and_relp
#undef do_func
#undef Elf_Addr
@@ -58,6 +63,11 @@
# define __has_rel_mcount __has64_rel_mcount
# define has_rel_mcount has64_rel_mcount
# define tot_relsize tot64_relsize
+# define find_symtab find_symtab64
+# define get_shnum get_shnum64
+# define set_shnum set_shnum64
+# define get_shstrndx get_shstrndx64
+# define get_symindex get_symindex64
# define get_sym_str_and_relp get_sym_str_and_relp_64
# define do_func do64
# define get_mcountsym get_mcountsym_64
@@ -91,6 +101,11 @@
# define __has_rel_mcount __has32_rel_mcount
# define has_rel_mcount has32_rel_mcount
# define tot_relsize tot32_relsize
+# define find_symtab find_symtab32
+# define get_shnum get_shnum32
+# define set_shnum set_shnum32
+# define get_shstrndx get_shstrndx32
+# define get_symindex get_symindex32
# define get_sym_str_and_relp get_sym_str_and_relp_32
# define do_func do32
# define get_mcountsym get_mcountsym_32
@@ -173,6 +188,67 @@ static int MIPS_is_fake_mcount(Elf_Rel const *rp)
return is_fake;
}
+static unsigned int get_symindex(Elf_Sym const *sym, Elf32_Word const *symtab,
+ Elf32_Word const *symtab_shndx)
+{
+ unsigned long offset;
+ int index;
+
+ if (sym->st_shndx != SHN_XINDEX)
+ return w2(sym->st_shndx);
+
+ offset = (unsigned long)sym - (unsigned long)symtab;
+ index = offset / sizeof(*sym);
+
+ return w(symtab_shndx[index]);
+}
+
+static unsigned int get_shnum(Elf_Ehdr const *ehdr, Elf_Shdr const *shdr0)
+{
+ if (shdr0 && !ehdr->e_shnum)
+ return w(shdr0->sh_size);
+
+ return w2(ehdr->e_shnum);
+}
+
+static void set_shnum(Elf_Ehdr *ehdr, Elf_Shdr *shdr0, unsigned int new_shnum)
+{
+ if (new_shnum >= SHN_LORESERVE) {
+ ehdr->e_shnum = 0;
+ shdr0->sh_size = w(new_shnum);
+ } else
+ ehdr->e_shnum = w2(new_shnum);
+}
+
+static int get_shstrndx(Elf_Ehdr const *ehdr, Elf_Shdr const *shdr0)
+{
+ if (ehdr->e_shstrndx != SHN_XINDEX)
+ return w2(ehdr->e_shstrndx);
+
+ return w(shdr0->sh_link);
+}
+
+static void find_symtab(Elf_Ehdr *const ehdr, Elf_Shdr const *shdr0,
+ unsigned const nhdr, Elf32_Word **symtab,
+ Elf32_Word **symtab_shndx)
+{
+ Elf_Shdr const *relhdr;
+ unsigned k;
+
+ *symtab = NULL;
+ *symtab_shndx = NULL;
+
+ for (relhdr = shdr0, k = nhdr; k; --k, ++relhdr) {
+ if (relhdr->sh_type == SHT_SYMTAB)
+ *symtab = (void *)ehdr + relhdr->sh_offset;
+ else if (relhdr->sh_type == SHT_SYMTAB_SHNDX)
+ *symtab_shndx = (void *)ehdr + relhdr->sh_offset;
+
+ if (*symtab && *symtab_shndx)
+ break;
+ }
+}
+
/* Append the new shstrtab, Elf_Shdr[], __mcount_loc and its relocations. */
static int append_func(Elf_Ehdr *const ehdr,
Elf_Shdr *const shstr,
@@ -188,10 +264,12 @@ static int append_func(Elf_Ehdr *const ehdr,
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);
+ Elf_Shdr *const shdr0 = (Elf_Shdr *)(old_shoff + (void *)ehdr);
+ unsigned int const old_shnum = get_shnum(ehdr, shdr0);
+ unsigned int const new_shnum = 2 + old_shnum; /* {.rel,}__mcount_loc */
uint_t t = 1 + strlen(mc_name) + _w(shstr->sh_size);
uint_t new_e_shoff;
@@ -201,6 +279,8 @@ static int append_func(Elf_Ehdr *const ehdr,
t += (_align & -t); /* word-byte align */
new_e_shoff = t;
+ set_shnum(ehdr, shdr0, new_shnum);
+
/* body for new shstrtab */
if (ulseek(sb.st_size, SEEK_SET) < 0)
return -1;
@@ -255,7 +335,6 @@ static int append_func(Elf_Ehdr *const ehdr,
return -1;
ehdr->e_shoff = _w(new_e_shoff);
- ehdr->e_shnum = w2(2 + w2(ehdr->e_shnum)); /* {.rel,}__mcount_loc */
if (ulseek(0, SEEK_SET) < 0)
return -1;
if (uwrite(ehdr, sizeof(*ehdr)) < 0)
@@ -434,6 +513,8 @@ static int find_secsym_ndx(unsigned const txtndx,
uint_t *const recvalp,
unsigned int *sym_index,
Elf_Shdr const *const symhdr,
+ Elf32_Word const *symtab,
+ Elf32_Word const *symtab_shndx,
Elf_Ehdr const *const ehdr)
{
Elf_Sym const *const sym0 = (Elf_Sym const *)(_w(symhdr->sh_offset)
@@ -445,7 +526,7 @@ static int find_secsym_ndx(unsigned const txtndx,
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)
+ if (txtndx == get_symindex(symp, symtab, symtab_shndx)
/* avoid STB_WEAK */
&& (STB_LOCAL == st_bind || STB_GLOBAL == st_bind)) {
/* function symbols on ARM have quirks, avoid them */
@@ -516,21 +597,23 @@ static unsigned tot_relsize(Elf_Shdr const *const shdr0,
return totrelsz;
}
-
/* Overall supervision for Elf32 ET_REL file. */
static int 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)];
+ unsigned const nhdr = get_shnum(ehdr, shdr0);
+ Elf_Shdr *const shstr = &shdr0[get_shstrndx(ehdr, shdr0)];
char const *const shstrtab = (char const *)(_w(shstr->sh_offset)
+ (void *)ehdr);
Elf_Shdr const *relhdr;
unsigned k;
+ Elf32_Word *symtab;
+ Elf32_Word *symtab_shndx;
+
/* Upper bound on space: assume all relevant relocs are for mcount. */
unsigned totrelsz;
@@ -561,6 +644,8 @@ static int do_func(Elf_Ehdr *const ehdr, char const *const fname,
return -1;
}
+ find_symtab(ehdr, shdr0, nhdr, &symtab, &symtab_shndx);
+
for (relhdr = shdr0, k = nhdr; k; --k, ++relhdr) {
char const *const txtname = has_rel_mcount(relhdr, shdr0,
shstrtab, fname);
@@ -577,6 +662,7 @@ static int do_func(Elf_Ehdr *const ehdr, char const *const fname,
result = find_secsym_ndx(w(relhdr->sh_info), txtname,
&recval, &recsym,
&shdr0[symsec_sh_link],
+ symtab, symtab_shndx,
ehdr);
if (result)
goto out;