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w6l: pass reloc-kind + dyn vidx if-ladders -> switch (Wave-2 structural)

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relocate() reloc-kind ladder -> switch(k): PC32+PLT32 share a
byte-identical body (comma-case), R_X86_64_64 absolute, default =
unsupported-reloc errs+=1. loadso() vidx ladder -> switch(vidx):
LOCAL not-exported, GLOBAL+BASE(1) unversioned (comma-case), default
= verdef name lookup. Regenerated w6l/main.combined.ww.
This commit is contained in:
Hojun-Cho
2026-06-03 01:45:47 +09:00
parent 63e070db10
commit 9f76e816d7
3 changed files with 26 additions and 36 deletions
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18
selfhost/cmd/w6l/dyn.ww
View File

@@ -326,22 +326,20 @@ export fn loadso(l: *lnk, path: *u8) i32 = {
keep = 0; // non-default
} else {
let vidx: u16 = v & VERSYM_VERSION_C;
if (vidx == VER_NDX_LOCAL_C) {
switch (vidx) {
case VER_NDX_LOCAL_C:
keep = 0; // not exported
} else { if (vidx == VER_NDX_GLOBAL_C) {
case VER_NDX_GLOBAL_C,1u16:
// glibc's BASE entry (vidx==1): treat as
// unversioned. (The C version notes that
// vidx==1 in Verdef maps to the SONAME BASE.)
vernamecs = nil;
} else { if (vidx == 1u16) {
// glibc's BASE entry: treat as
// unversioned. (The C version
// notes that vidx==1 in Verdef
// maps to the SONAME BASE.)
vernamecs = nil;
} else {
case:
if (verstr != nil) {
let nm: *u8 = vdnameat(buf, verdefoff, verdefsize, verstr, vidx);
vernamecs = nm;
};
}; }; };
};
};
};

31
selfhost/cmd/w6l/main.combined.ww
View File

@@ -3888,22 +3888,20 @@ export fn loadso(l: *lnk, path: *u8) i32 = {
keep = 0; // non-default
} else {
let vidx: u16 = v & VERSYM_VERSION_C;
if (vidx == VER_NDX_LOCAL_C) {
switch (vidx) {
case VER_NDX_LOCAL_C:
keep = 0; // not exported
} else { if (vidx == VER_NDX_GLOBAL_C) {
case VER_NDX_GLOBAL_C,1u16:
// glibc's BASE entry (vidx==1): treat as
// unversioned. (The C version notes that
// vidx==1 in Verdef maps to the SONAME BASE.)
vernamecs = nil;
} else { if (vidx == 1u16) {
// glibc's BASE entry: treat as
// unversioned. (The C version
// notes that vidx==1 in Verdef
// maps to the SONAME BASE.)
vernamecs = nil;
} else {
case:
if (verstr != nil) {
let nm: *u8 = vdnameat(buf, verdefoff, verdefsize, verstr, vidx);
vernamecs = nm;
};
}; }; };
};
};
};
@@ -4074,15 +4072,12 @@ export fn relocate(l: *lnk, textva: u64, datava: u64) i32 = {
let symva: u64 = textva + r.sym.val;
if (r.sym.indata != 0) { symva = datava + r.sym.val; };
let k: i32 = r.kind;
if (k == R_X86_64_PC32) {
switch (k) {
case R_X86_64_PC32,R_X86_64_PLT32:
let site: u64 = textva + r.off;
let rel: i64 = (symva: i64 - site: i64) + r.addend;
patchu32(l.text + r.off, rel: u32);
} else { if (k == R_X86_64_PLT32) {
let site: u64 = textva + r.off;
let rel: i64 = (symva: i64 - site: i64) + r.addend;
patchu32(l.text + r.off, rel: u32);
} else { if (k == R_X86_64_64) {
case R_X86_64_64:
// Absolute 64-bit. Currently used only
// for DATAR slots in .data.
let v: u64 = (symva: i64 + r.addend): u64;
@@ -4091,10 +4086,10 @@ export fn relocate(l: *lnk, textva: u64, datava: u64) i32 = {
} else {
patchu64(l.text + r.off, v);
};
} else {
case:
os.write(2, "w6l: unsupported reloc kind\n".ptr, 27u64);
l.errs += 1;
};};};
};
};
};
r = r.rnext;

13
selfhost/cmd/w6l/pass.ww
View File

@@ -105,15 +105,12 @@ export fn relocate(l: *lnk, textva: u64, datava: u64) i32 = {
let symva: u64 = textva + r.sym.val;
if (r.sym.indata != 0) { symva = datava + r.sym.val; };
let k: i32 = r.kind;
if (k == R_X86_64_PC32) {
switch (k) {
case R_X86_64_PC32,R_X86_64_PLT32:
let site: u64 = textva + r.off;
let rel: i64 = (symva: i64 - site: i64) + r.addend;
patchu32(l.text + r.off, rel: u32);
} else { if (k == R_X86_64_PLT32) {
let site: u64 = textva + r.off;
let rel: i64 = (symva: i64 - site: i64) + r.addend;
patchu32(l.text + r.off, rel: u32);
} else { if (k == R_X86_64_64) {
case R_X86_64_64:
// Absolute 64-bit. Currently used only
// for DATAR slots in .data.
let v: u64 = (symva: i64 + r.addend): u64;
@@ -122,10 +119,10 @@ export fn relocate(l: *lnk, textva: u64, datava: u64) i32 = {
} else {
patchu64(l.text + r.off, v);
};
} else {
case:
os.write(2, "w6l: unsupported reloc kind\n".ptr, 27u64);
l.errs += 1;
};};};
};
};
};
r = r.rnext;