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riscv: add support for static PIE 

In order to support static PIE the startup code must avoid relocations
before __libc_start_main is called.
This commit is contained in:
Andreas Schwab 2024-01-17 15:35:57 +01:00
parent bcf2abd43b
commit 6edaa12b41
1 changed files with 11 additions and 0 deletions
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11
sysdeps/riscv/start.S
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@ -50,7 +50,13 @@ ENTRY (ENTRY_POINT)
call load_gp call load_gp
mv a5, a0 /* rtld_fini. */ mv a5, a0 /* rtld_fini. */
/* main may be in a shared library. */ /* main may be in a shared library. */
#if defined PIC && !defined SHARED
/* Avoid relocation in static PIE since _start is called before it
is relocated. */
lla a0, __wrap_main
#else
la a0, main la a0, main
#endif
REG_L a1, 0(sp) /* argc. */ REG_L a1, 0(sp) /* argc. */
addi a2, sp, SZREG /* argv. */ addi a2, sp, SZREG /* argv. */
andi sp, sp, ALMASK /* Align stack. */ andi sp, sp, ALMASK /* Align stack. */
@ -62,6 +68,11 @@ ENTRY (ENTRY_POINT)
ebreak ebreak
END (ENTRY_POINT) END (ENTRY_POINT)
#if defined PIC && !defined SHARED
__wrap_main:
tail main@plt
#endif
/* Dynamic links need the global pointer to be initialized prior to calling /* Dynamic links need the global pointer to be initialized prior to calling
any shared library's initializers, so we use preinit_array to load it. any shared library's initializers, so we use preinit_array to load it.
This doesn't cut it for static links, though, since the global pointer This doesn't cut it for static links, though, since the global pointer