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| author | Alan Modra <amodra@gmail.com> | 2020-09-12 10:49:13 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2021-01-18 23:07:40 +1030 |
| commit | 326adec374dd43086dbf9bb2b8f18d547389e678 (patch) | |
| tree | 4ec75ed52a3113978a6a585d2270d25ca20f2865 /ld | |
| parent | d3d7d1ba3bbf899bd318a6d4e63ba24534ad5e86 (diff) | |
| download | gdb-326adec374dd43086dbf9bb2b8f18d547389e678.zip gdb-326adec374dd43086dbf9bb2b8f18d547389e678.tar.gz gdb-326adec374dd43086dbf9bb2b8f18d547389e678.tar.bz2 | |
PR26378, sections initialised only by linker scripts are always read/write
This changes the initialisation of output sections so that it is
possible to create read-only sections fed only from linker script
BYTE, SHORT, LONG or QUAD. That currently isn't possible even for one
of the well-known ELF sections like .rodata, because once a section is
marked read/write that sticks. On the other hand if we start
read-only, well-known ELF sections end up read/write as appropriate.
For example .tdata will still be SHF_ALLOC + SHF_WRITE + SHF_TLS.
PR 26378
* ldlang.c (map_input_to_output_sections): Start with a read-only
section for data statements.
* testsuite/ld-elf/size-2.d: Adjust to suit.
Diffstat (limited to 'ld')
| -rw-r--r-- | ld/ChangeLog | 7 | ||||
| -rw-r--r-- | ld/ldlang.c | 2 | ||||
| -rw-r--r-- | ld/testsuite/ld-elf/size-2.d | 2 |
3 files changed, 9 insertions, 2 deletions
diff --git a/ld/ChangeLog b/ld/ChangeLog index 92fa8a4..688a442 100644 --- a/ld/ChangeLog +++ b/ld/ChangeLog @@ -1,3 +1,10 @@ +2021-01-18 Alan Modra <amodra@gmail.com> + + PR 26378 + * ldlang.c (map_input_to_output_sections): Start with a read-only + section for data statements. + * testsuite/ld-elf/size-2.d: Adjust to suit. + 2021-01-17 H.J. Lu <hongjiu.lu@intel.com> PR ld/27193 diff --git a/ld/ldlang.c b/ld/ldlang.c index 4ae9cec..8014e7a 100644 --- a/ld/ldlang.c +++ b/ld/ldlang.c @@ -4225,7 +4225,7 @@ map_input_to_output_sections break; } if (os->bfd_section == NULL) - init_os (os, flags); + init_os (os, flags | SEC_READONLY); else os->bfd_section->flags |= flags; break; diff --git a/ld/testsuite/ld-elf/size-2.d b/ld/testsuite/ld-elf/size-2.d index 1420224..9f1a9cf 100644 --- a/ld/testsuite/ld-elf/size-2.d +++ b/ld/testsuite/ld-elf/size-2.d @@ -11,7 +11,7 @@ .* \.text +PROGBITS +0+100 [0-9a-f]+ 0+10 00 AX .* .* \.tdata +PROGBITS +0+110 [0-9a-f]+ 0+20 00 WAT .* .* \.tbss +NOBITS +0+130 [0-9a-f]+ 0+30 00 WAT .* -.* \.map +PROGBITS +0+130 [0-9a-f]+ 0+c 00 +WA .* +.* \.map +PROGBITS +0+130 [0-9a-f]+ 0+c 00 +A .* #... +PHDR +(0x0+40 0x0+40 0x0+40 0x0+a8 0x0+a8|0x0+34 0x0+34 0x0+34 0x0+60 0x0+60|0x0+34 0x0+a0 0x0+a0 0x0+60 0x0+60) R .* +LOAD +(0x0+40 0x0+40 0x0+40 0x0+fc 0x0+fc|0x0+34 0x0+34 0x0+34 0x0+1(08|10) 0x0+1(08|10)|0x0+34 0x0+a0 0x0+a0 0x0+9c 0x0+9c) R E .* |