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std.dynamic_library: update to new elf API

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This commit is contained in:
Andrew Kelley 2024-10-12 10:43:58 -07:00
parent 49637f5372
commit de04a8a1ef
2 changed files with 22 additions and 25 deletions
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30
lib/std/dynamic_library.zig
View File

@ -141,7 +141,7 @@ pub const ElfDynLib = struct {
strings: [*:0]u8,
syms: [*]elf.Sym,
hashtab: [*]posix.Elf_Symndx,
versym: ?[*]u16,
versym: ?[*]elf.Versym,
verdef: ?*elf.Verdef,
memory: []align(mem.page_size) u8,
@ -319,7 +319,7 @@ pub const ElfDynLib = struct {
var maybe_strings: ?[*:0]u8 = null;
var maybe_syms: ?[*]elf.Sym = null;
var maybe_hashtab: ?[*]posix.Elf_Symndx = null;
var maybe_versym: ?[*]u16 = null;
var maybe_versym: ?[*]elf.Versym = null;
var maybe_verdef: ?*elf.Verdef = null;
{
@ -327,11 +327,11 @@ pub const ElfDynLib = struct {
while (dynv[i] != 0) : (i += 2) {
const p = base + dynv[i + 1];
switch (dynv[i]) {
elf.DT_STRTAB => maybe_strings = @as([*:0]u8, @ptrFromInt(p)),
elf.DT_SYMTAB => maybe_syms = @as([*]elf.Sym, @ptrFromInt(p)),
elf.DT_HASH => maybe_hashtab = @as([*]posix.Elf_Symndx, @ptrFromInt(p)),
elf.DT_VERSYM => maybe_versym = @as([*]u16, @ptrFromInt(p)),
elf.DT_VERDEF => maybe_verdef = @as(*elf.Verdef, @ptrFromInt(p)),
elf.DT_STRTAB => maybe_strings = @ptrFromInt(p),
elf.DT_SYMTAB => maybe_syms = @ptrFromInt(p),
elf.DT_HASH => maybe_hashtab = @ptrFromInt(p),
elf.DT_VERSYM => maybe_versym = @ptrFromInt(p),
elf.DT_VERDEF => maybe_verdef = @ptrFromInt(p),
else => {},
}
}
@ -399,18 +399,16 @@ pub const ElfDynLib = struct {
}
};
fn checkver(def_arg: *elf.Verdef, vsym_arg: i32, vername: []const u8, strings: [*:0]u8) bool {
fn checkver(def_arg: *elf.Verdef, vsym_arg: elf.Versym, vername: []const u8, strings: [*:0]u8) bool {
var def = def_arg;
const vsym = @as(u32, @bitCast(vsym_arg)) & 0x7fff;
const vsym_index = vsym_arg.VERSION;
while (true) {
if (0 == (def.vd_flags & elf.VER_FLG_BASE) and (def.vd_ndx & 0x7fff) == vsym)
break;
if (def.vd_next == 0)
return false;
def = @as(*elf.Verdef, @ptrFromInt(@intFromPtr(def) + def.vd_next));
if (0 == (def.flags & elf.VER_FLG_BASE) and @intFromEnum(def.ndx) == vsym_index) break;
if (def.next == 0) return false;
def = @ptrFromInt(@intFromPtr(def) + def.next);
}
const aux = @as(*elf.Verdaux, @ptrFromInt(@intFromPtr(def) + def.vd_aux));
return mem.eql(u8, vername, mem.sliceTo(strings + aux.vda_name, 0));
const aux: *elf.Verdaux = @ptrFromInt(@intFromPtr(def) + def.aux);
return mem.eql(u8, vername, mem.sliceTo(strings + aux.name, 0));
}
test "ElfDynLib" {

17
lib/std/os/linux/vdso.zig
View File

@ -34,7 +34,7 @@ pub fn lookup(vername: []const u8, name: []const u8) usize {
const dynv = maybe_dynv orelse return 0;
if (base == maxInt(usize)) return 0;
var maybe_strings: ?[*]u8 = null;
var maybe_strings: ?[*:0]u8 = null;
var maybe_syms: ?[*]elf.Sym = null;
var maybe_hashtab: ?[*]linux.Elf_Symndx = null;
var maybe_versym: ?[*]elf.Versym = null;
@ -45,11 +45,11 @@ pub fn lookup(vername: []const u8, name: []const u8) usize {
while (dynv[i] != 0) : (i += 2) {
const p = base +% dynv[i + 1];
switch (dynv[i]) {
elf.DT_STRTAB => maybe_strings = @as([*]u8, @ptrFromInt(p)),
elf.DT_SYMTAB => maybe_syms = @as([*]elf.Sym, @ptrFromInt(p)),
elf.DT_HASH => maybe_hashtab = @as([*]linux.Elf_Symndx, @ptrFromInt(p)),
elf.DT_VERSYM => maybe_versym = @as([*]elf.Versym, @ptrFromInt(p)),
elf.DT_VERDEF => maybe_verdef = @as(*elf.Verdef, @ptrFromInt(p)),
elf.DT_STRTAB => maybe_strings = @ptrFromInt(p),
elf.DT_SYMTAB => maybe_syms = @ptrFromInt(p),
elf.DT_HASH => maybe_hashtab = @ptrFromInt(p),
elf.DT_VERSYM => maybe_versym = @ptrFromInt(p),
elf.DT_VERDEF => maybe_verdef = @ptrFromInt(p),
else => {},
}
}
@ -80,7 +80,7 @@ pub fn lookup(vername: []const u8, name: []const u8) usize {
return 0;
}
fn checkver(def_arg: *elf.Verdef, vsym_arg: elf.Versym, vername: []const u8, strings: [*]u8) bool {
fn checkver(def_arg: *elf.Verdef, vsym_arg: elf.Versym, vername: []const u8, strings: [*:0]u8) bool {
var def = def_arg;
const vsym_index = vsym_arg.VERSION;
while (true) {
@ -89,6 +89,5 @@ fn checkver(def_arg: *elf.Verdef, vsym_arg: elf.Versym, vername: []const u8, str
def = @ptrFromInt(@intFromPtr(def) + def.next);
}
const aux: *elf.Verdaux = @ptrFromInt(@intFromPtr(def) + def.aux);
const vda_name: [*:0]u8 = @ptrCast(strings + aux.name);
return mem.eql(u8, vername, mem.sliceTo(vda_name, 0));
return mem.eql(u8, vername, mem.sliceTo(strings + aux.name, 0));
}