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cmd/link/internal/loong64: add immediate range detection to the internal linker

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Change-Id: If535d843318e5a16584eabd7df2d2fdd04896965
Reviewed-on: https://go-review.googlesource.com/c/go/+/754980
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Mark Freeman <markfreeman@google.com>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
This commit is contained in:
limeidan
2026-03-13 11:25:44 +08:00
committed by abner chenc
parent e22437d192
commit b48b6fa2fa
1 changed files with 27 additions and 0 deletions
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27
src/cmd/link/internal/loong64/asm.go
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@@ -600,24 +600,40 @@ func archreloc(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, r loade
case objabi.R_LOONG64_ADDR_PCREL20_S2:
pc := ldr.SymValue(s) + int64(r.Off())
t := (ldr.SymAddr(rs) + r.Add() - pc) >> 2
if t < -1<<21 || t >= 1<<21 {
ldr.Errorf(s, "reloc: R_LOONG64_ADDR_PCREL20_S2, offset out of range %d", t)
}
// pcaddi
return val&0xfe00001f | ((t & 0xfffff) << 5), noExtReloc, isOk
case objabi.R_LOONG64_TLS_LE_HI,
objabi.R_LOONG64_TLS_LE_LO:
t := ldr.SymAddr(rs) + r.Add()
if t < -1<<31 || t >= 1<<31 {
ldr.Errorf(s, "reloc: R_LOONG64_TLS_LE_HI/LO, TLS offset out of range %d", t)
}
if r.Type() == objabi.R_LOONG64_TLS_LE_LO {
// ori
return val&0xffc003ff | ((t & 0xfff) << 10), noExtReloc, isOk
}
// lu12i.w
return val&0xfe00001f | (((t) >> 12 << 5) & 0x1ffffe0), noExtReloc, isOk
case objabi.R_CALLLOONG64:
pc := ldr.SymValue(s) + int64(r.Off())
t := ldr.SymAddr(rs) + r.Add() - pc
if t < -1<<27 || t >= 1<<27 {
ldr.Errorf(s, "reloc: R_CALLLOONG64, program too large, call relocation distance = %d", t)
}
// bl
return val&0xfc000000 | (((t >> 2) & 0xffff) << 10) | (((t >> 2) & 0x3ff0000) >> 16), noExtReloc, isOk
case objabi.R_LOONG64_CALL36:
pc := ldr.SymValue(s) + int64(r.Off())
t := (ldr.SymAddr(rs) + r.Add() - pc) >> 2
if t < -1<<37 || t >= 1<<37 {
ldr.Errorf(s, "reloc: R_LOONG64_CALL36, program too large, call relocation distance = %d", t)
}
// val is pcaddu18i (lower half) + jirl (upper half)
pcaddu18i := (val & 0xfe00001f) | (((t + 0x8000) >> 16) << 5)
jirl := ((val >> 32) & 0xfc0003ff) | ((t & 0xffff) << 10)
@@ -628,8 +644,16 @@ func archreloc(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, r loade
pc := ldr.SymValue(s) + int64(r.Off())
t := ldr.SymAddr(rs) + r.Add() - pc
if r.Type() == objabi.R_JMP16LOONG64 {
if t < -1<<17 || t >= 1<<17 {
ldr.Errorf(s, "reloc: R_JMP16LOONG64, program too large, jmp relocation distance = %d", t)
}
// beq/bne/blt[u]/bge[u]
return val&0xfc0003ff | (((t >> 2) & 0xffff) << 10), noExtReloc, isOk
}
if t < -1<<22 || t >= 1<<22 {
ldr.Errorf(s, "reloc: R_JMP21LOONG64, program too large, call relocation distance = %d", t)
}
// beqz/bnez
return val&0xfc0003e0 | (((t >> 2) & 0xffff) << 10) | (((t >> 2) & 0x1f0000) >> 16), noExtReloc, isOk
case objabi.R_LOONG64_TLS_IE_HI,
@@ -639,6 +663,9 @@ func archreloc(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, r loade
ldr.Errorf(s, "TLS reloc on unsupported OS %v", target.HeadType)
}
t := ldr.SymAddr(rs) + r.Add()
if t < -1<<31 || t >= 1<<31 {
ldr.Errorf(s, "reloc: R_LOONG64_TLS_IE_HI/LO, TLS offset out of range %d", t)
}
if r.Type() == objabi.R_LOONG64_TLS_IE_HI {
// pcalau12i -> lu12i.w
return (0x14000000 | (val & 0x1f) | ((t >> 12) << 5)), noExtReloc, isOk