Change the linker's heuristic for computing the entry point for binaries so that shared libraries default to an entry point of 0.
* ldlang.c (lang_end): When computing the entry point, only try the start address of the entry section when creating an executable. * ld.texi (Entry point): Update description of heuristic used to choose the entry point. testsuite/ld-alpha/tlspic.rd: Update expected entry point address. testsuite/ld-arm/tls-gdesc-got.d: Likewise. testsuite/ld-i386/tlsnopic.rd: Likewise. testsuite/ld-ia64/tlspic.rd: Likewise. testsuite/ld-sparc/gotop32.rd: Likewise. testsuite/ld-sparc/gotop64.rd: Likewise. testsuite/ld-sparc/tlssunnopic32.rd: Likewise. testsuite/ld-sparc/tlssunnopic64.rd: Likewise. testsuite/ld-sparc/tlssunpic32.rd: Likewise. testsuite/ld-sparc/tlssunpic64.rd: Likewise. testsuite/ld-tic6x/shlib-1.rd: Likewise. testsuite/ld-tic6x/shlib-1b.rd: Likewise. testsuite/ld-tic6x/shlib-1r.rd: Likewise. testsuite/ld-tic6x/shlib-1rb.rd: Likewise. testsuite/ld-tic6x/shlib-noindex.rd: Likewise. testsuite/ld-x86-64/pr14207.d: Likewise. testsuite/ld-x86-64/tlsdesc.rd: Likewise. testsuite/ld-x86-64/tlspic.rd: Likewise. testsuite/ld-x86-64/tlspic2.rd: Likewise.
This commit is contained in:
Nick Clifton
parent
5335ab6872
commit
5226a6a892
27
ld/ChangeLog
27
ld/ChangeLog
@ -1,3 +1,30 @@
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2021-09-21 Nick Clifton <nickc@redhat.com>
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* ldlang.c (lang_end): When computing the entry point, only
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try the start address of the entry section when creating an
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executable.
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* ld.texi (Entry point): Update description of heuristic used to
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choose the entry point.
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testsuite/ld-alpha/tlspic.rd: Update expected entry point address.
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testsuite/ld-arm/tls-gdesc-got.d: Likewise.
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testsuite/ld-i386/tlsnopic.rd: Likewise.
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testsuite/ld-ia64/tlspic.rd: Likewise.
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testsuite/ld-sparc/gotop32.rd: Likewise.
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testsuite/ld-sparc/gotop64.rd: Likewise.
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testsuite/ld-sparc/tlssunnopic32.rd: Likewise.
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testsuite/ld-sparc/tlssunnopic64.rd: Likewise.
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testsuite/ld-sparc/tlssunpic32.rd: Likewise.
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testsuite/ld-sparc/tlssunpic64.rd: Likewise.
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testsuite/ld-tic6x/shlib-1.rd: Likewise.
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testsuite/ld-tic6x/shlib-1b.rd: Likewise.
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testsuite/ld-tic6x/shlib-1r.rd: Likewise.
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testsuite/ld-tic6x/shlib-1rb.rd: Likewise.
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testsuite/ld-tic6x/shlib-noindex.rd: Likewise.
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testsuite/ld-x86-64/pr14207.d: Likewise.
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testsuite/ld-x86-64/tlsdesc.rd: Likewise.
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testsuite/ld-x86-64/tlspic.rd: Likewise.
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testsuite/ld-x86-64/tlspic2.rd: Likewise.
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2021-09-15 Claudiu Zissulescu <claziss@synopsys.com>
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* testsuite/ld-arc/got-weak.d: Update file.
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@ -3910,7 +3910,9 @@ the value of a target-specific symbol, if it is defined; For many
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targets this is @code{start}, but PE- and BeOS-based systems for example
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check a list of possible entry symbols, matching the first one found.
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@item
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the address of the first byte of the @samp{.text} section, if present;
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the address of the first byte of the code section, if present and an
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executable is being created - the code section is usually
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@samp{.text}, but can be something else;
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@item
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The address @code{0}.
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@end itemize
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10
ld/ldlang.c
10
ld/ldlang.c
@ -6984,7 +6984,8 @@ lang_end (void)
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if (!bfd_set_start_address (link_info.output_bfd, val))
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einfo (_("%F%P: can't set start address\n"));
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}
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else
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/* BZ 2004952: Only use the start of the entry section for executables. */
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else if bfd_link_executable (&link_info)
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{
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asection *ts;
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@ -7010,6 +7011,13 @@ lang_end (void)
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entry_symbol.name);
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}
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}
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else
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{
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if (warn)
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einfo (_("%P: warning: cannot find entry symbol %s;"
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" not setting start address\n"),
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entry_symbol.name);
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}
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}
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}
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@ -29,7 +29,7 @@ Section Headers:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -2,7 +2,7 @@
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.*/tls-lib2-got.so: file format elf32-.*arm.*
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architecture: arm.*, flags 0x00000150:
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HAS_SYMS, DYNAMIC, D_PAGED
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start address 0x0+8(1e8|220)
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start address 0x[0-9a-f]+
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Disassembly of section .got:
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@ -26,7 +26,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -31,7 +31,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -23,7 +23,7 @@ Section Headers:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -23,7 +23,7 @@ Section Headers:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -23,7 +23,7 @@ Section Headers:
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+\[[ 0-9]+\] .shstrtab +.*
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -23,7 +23,7 @@ Section Headers:
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+\[[ 0-9]+\] .shstrtab +.*
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -27,7 +27,7 @@ Section Headers:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -27,7 +27,7 @@ Section Headers:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -23,7 +23,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x10000080
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Entry point 0x[0-9a-f]+
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There are 4 program headers, starting at offset 52
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Program Headers:
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@ -23,7 +23,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x10000080
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Entry point 0x[0-9a-f]+
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There are 4 program headers, starting at offset 52
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Program Headers:
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@ -23,7 +23,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x10000080
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Entry point 0x[0-9a-f]+
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There are 4 program headers, starting at offset 52
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Program Headers:
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@ -23,7 +23,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x10000080
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Entry point 0x[0-9a-f]+
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There are 4 program headers, starting at offset 52
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Program Headers:
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@ -24,7 +24,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x10000080
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Entry point 0x[0-9a-f]+
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There are 4 program headers, starting at offset 52
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Program Headers:
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@ -5,7 +5,7 @@
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#target: x86_64-*-linux*
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Elf file type is DYN \(Shared object file\)
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Entry point 0x149
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Entry point 0x[0-9a-f]+
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There are 4 program headers, starting at offset 64
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Program Headers:
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@ -29,7 +29,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -29,7 +29,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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@ -29,7 +29,7 @@ Key to Flags:
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#...
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Elf file type is DYN \(Shared object file\)
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Entry point 0x1000
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Entry point 0x[0-9a-f]+
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There are [0-9]+ program headers, starting at offset [0-9]+
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Program Headers:
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