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RISC-V: Adjust __global_pointer$ value to reduce code size.

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ld/
	* emulparams/elf32lriscv-defs.sh (DATA_START_SYMBOLS): New.
	(SDATA_START_SYMBOLS): Define __SDATA_BEGIN__.  Don't define
	__global_pointer$.
	(OTHER_END_SYMBOLS): New.  Define __global_pointer$.
	* testsuite/ld-riscv-elf/pcrel-lo-addend-2.d (#ld): Add --no-relax.
This commit is contained in:
Jim Wilson 2018-10-15 16:00:28 -07:00
parent 0e0dd7f1e8
commit 640be958cd
3 changed files with 21 additions and 2 deletions
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8
ld/ChangeLog
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@ -1,3 +1,11 @@
2018-10-15 Jim Wilson <jimw@sifive.com>
* emulparams/elf32lriscv-defs.sh (DATA_START_SYMBOLS): New.
(SDATA_START_SYMBOLS): Define __SDATA_BEGIN__. Don't define
__global_pointer$.
(OTHER_END_SYMBOLS): New. Define __global_pointer$.
* testsuite/ld-riscv-elf/pcrel-lo-addend-2.d (#ld): Add --no-relax.
2018-10-15 Alan Modra <amodra@gmail.com>
PR 23534

13
ld/emulparams/elf32lriscv-defs.sh
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@ -30,8 +30,19 @@ TEXT_START_ADDR=0x10000
MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
COMMONPAGESIZE="CONSTANT (COMMONPAGESIZE)"
SDATA_START_SYMBOLS="${CREATE_SHLIB-__global_pointer$ = . + 0x800;}
DATA_START_SYMBOLS="${CREATE_SHLIB-__DATA_BEGIN__ = .;}"
SDATA_START_SYMBOLS="${CREATE_SHLIB-__SDATA_BEGIN__ = .;}
*(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata .srodata.*)"
INITIAL_READONLY_SECTIONS=".interp : { *(.interp) } ${CREATE_PIE-${INITIAL_READONLY_SECTIONS}}"
INITIAL_READONLY_SECTIONS="${RELOCATING+${CREATE_SHLIB-${INITIAL_READONLY_SECTIONS}}}"
# We must cover as much of sdata as possible if it exists. If sdata+bss is
# smaller than 0x1000 then we should start from bss end to cover as much of
# the program as possible. But we can't allow gp to cover any of rodata, as
# the address of variables in rodata may change during relaxation, so we start
# from data in that case.
OTHER_END_SYMBOLS="${CREATE_SHLIB-__BSS_END__ = .;
__global_pointer$ = MIN(__SDATA_BEGIN__ + 0x800,
MAX(__DATA_BEGIN__ + 0x800, __BSS_END__ - 0x800));}"

2
ld/testsuite/ld-riscv-elf/pcrel-lo-addend-2.d
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@ -1,5 +1,5 @@
#name: %pcrel_lo overflow with an addend
#source: pcrel-lo-addend-2.s
#as: -march=rv32ic
#ld: -melf32lriscv
#ld: -melf32lriscv --no-relax
#error: .*dangerous relocation: %pcrel_lo overflow with an addend