forked from OSchip/llvm-project
Don't make _gp absolute.
_gp points to a position in the file, so it is not really absolute. It is also simpler to not force it to be absolute, so if there is no strong ABI requirement we should not do it. llvm-svn: 313333
This commit is contained in:
Rafael Espindola
parent
325b6c1efe
commit
056190c348
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@ -63,7 +63,6 @@ private:
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void assignFileOffsetsBinary();
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void setPhdrs();
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void fixSectionAlignments();
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void makeMipsGpAbs();
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void openFile();
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void writeTrapInstr();
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void writeHeader();
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@ -216,8 +215,6 @@ template <class ELFT> void Writer<ELFT>::run() {
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if (Config->Relocatable) {
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for (OutputSection *Sec : OutputSections)
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Sec->Addr = 0;
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} else {
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makeMipsGpAbs();
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}
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// It does not make sense try to open the file if we have error already.
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@ -1774,14 +1771,6 @@ static uint16_t getELFType() {
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return ET_EXEC;
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}
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// For some reason we have to make the mips gp symbol absolute.
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template <class ELFT> void Writer<ELFT>::makeMipsGpAbs() {
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if (ElfSym::MipsGp && ElfSym::MipsGp->Section) {
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ElfSym::MipsGp->Value += cast<OutputSection>(ElfSym::MipsGp->Section)->Addr;
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ElfSym::MipsGp->Section = nullptr;
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}
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}
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template <class ELFT> void Writer<ELFT>::writeHeader() {
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uint8_t *Buf = Buffer->getBufferStart();
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memcpy(Buf, "\177ELF", 4);
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@ -228,7 +228,7 @@ __start:
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# CHECK-NEXT: Other [ (0x2)
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# CHECK-NEXT: STV_HIDDEN (0x2)
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# CHECK-NEXT: ]
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# CHECK-NEXT: Section: Absolute
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# CHECK-NEXT: Section: .got
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# CHECK-NEXT: }
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# CHECK-NEXT: Symbol {
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# CHECK-NEXT: Name: __start
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@ -12,7 +12,7 @@
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# CHECK-NEXT: 10004: 03 99 e0 2d daddu $gp, $gp, $25
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# CHECK-NEXT: 10008: 67 9c 7f f0 daddiu $gp, $gp, 32752
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# CHECK: 0000000000027ff0 *ABS* 00000000 .hidden _gp
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# CHECK: 0000000000027ff0 .got 00000000 .hidden _gp
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# CHECK: 0000000000010000 .text 00000000 foo
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.text
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@ -24,7 +24,7 @@
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# ^-- 0x20004 - 0x37ff0 = 0xfffffffffffe8014
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# CHECK: 0000000000020004 .text 00000000 loc
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# CHECK: 0000000000037ff0 *ABS* 00000000 .hidden _gp
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# CHECK: 0000000000037ff0 .got 00000000 .hidden _gp
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# CHECK: 0000000000020000 .text 00000000 __start
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# REL: Relocations [
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@ -47,7 +47,7 @@ v1:
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# EXE_SYM: Sections:
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# EXE_SYM: .got 0000000c 0000000000030010 DATA
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# EXE_SYM: SYMBOL TABLE:
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# EXE_SYM: 00038000 *ABS* 00000000 .hidden _gp
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# EXE_SYM: 00038000 .got 00000000 .hidden _gp
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# ^-- .got + GP offset (0x7ff0)
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# EXE_SYM: 00030000 g .data 00000004 v1
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@ -71,7 +71,7 @@ v1:
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# DSO_SYM: Sections:
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# DSO_SYM: .got 0000000c 0000000000020010 DATA
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# DSO_SYM: SYMBOL TABLE:
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# DSO_SYM: 00028000 *ABS* 00000000 .hidden _gp
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# DSO_SYM: 00028000 .got 00000000 .hidden _gp
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# ^-- .got + GP offset (0x7ff0)
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# DSO_SYM: 00020000 g .data 00000004 v1
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@ -24,7 +24,7 @@
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# DIS-NEXT: 10000: 3c 08 00 01 lui $8, 1
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# DIS-NEXT: 10004: 21 08 7f f0 addi $8, $8, 32752
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# ^-- 0x37ff0 & 0xffff
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# DIS: 00027ff0 *ABS* 00000000 .hidden _gp
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# DIS: 00027ff0 .got 00000000 .hidden _gp
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# REL: Relocations [
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# REL-NEXT: ]
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@ -11,7 +11,7 @@
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# CHECK-NEXT: 20000: 3c 08 00 03 lui $8, 3
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# CHECK-NEXT: 20004: 21 08 7f f0 addi $8, $8, 32752
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# CHECK: 00037ff0 *ABS* 00000000 .hidden _gp
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# CHECK: 00037ff0 .got 00000000 .hidden _gp
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.text
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.globl __start
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@ -29,7 +29,7 @@
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# DUMP: SYMBOL TABLE:
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# DUMP: 00010008 .text 00000000 bar
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# DUMP: 00010004 .text 00000000 foo
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# DUMP: 00027ff0 *ABS* 00000000 .hidden _gp
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# DUMP: 00027ff0 .got 00000000 .hidden _gp
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# ERR: error: {{.*}}mips-gp0-non-zero.o: unsupported non-zero ri_gp_value
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@ -28,4 +28,4 @@ v1:
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# CHECK: SYMBOL TABLE:
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# CHECK: 00010008 .text 00000000 bar
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# CHECK: 00010004 .text 00000000 foo
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# CHECK: 00027ff0 *ABS* 00000000 .hidden _gp
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# CHECK: 00027ff0 .got 00000000 .hidden _gp
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@ -34,7 +34,7 @@ bar:
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# EXE: SYMBOL TABLE:
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# EXE: 0002000c .text 00000000 bar
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# EXE: 00038000 *ABS* 00000000 .hidden _gp
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# EXE: 00038000 .got 00000000 .hidden _gp
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# EXE: 00020000 .text 00000000 __start
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# SO: Disassembly of section .text:
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@ -51,5 +51,5 @@ bar:
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# SO: SYMBOL TABLE:
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# SO: 0001000c .text 00000000 bar
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# SO: 00028000 *ABS* 00000000 .hidden _gp
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# SO: 00028000 .got 00000000 .hidden _gp
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# SO: 00010000 .text 00000000 __start
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@ -54,7 +54,7 @@
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# FIXME-EL-NEXT: 20028: 00 00 00 00 nop
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# FIXME-EL-NEXT: 2002c: 00 94 e8 ff b -44
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# SYM: 00037ff0 *ABS* 00000000 .hidden _gp
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# SYM: 00037ff0 .got 00000000 .hidden _gp
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# SYM: 00020000 g F .text 00000000 foo
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# SYM: 00020010 .text 00000000 __start
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@ -42,7 +42,7 @@
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# ^-- loc
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# CHECK: 00020004 .text 00000000 loc
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# CHECK: 00037ff0 *ABS* 00000000 .hidden _gp
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# CHECK: 00037ff0 .got 00000000 .hidden _gp
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# CHECK: 00020000 g F .text 00000000 __start
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# ELF: Format: ELF32-mips
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