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| author | Andreas Schwab <schwab@suse.de> | 2024-01-17 15:35:57 +0100 |
|---|---|---|
| committer | Andreas Schwab <schwab@suse.de> | 2024-01-22 14:58:23 +0100 |
| commit | 6edaa12b41a373f249469d7b516d2043f81aea37 (patch) | |
| tree | 12d244129f9d4987e3a1526a4759e4e183eb5194 | |
| parent | bcf2abd43bbe6ffdd8b6a1e1e36cc67a9769e508 (diff) | |
| download | glibc-6edaa12b41a373f249469d7b516d2043f81aea37.tar.gz glibc-6edaa12b41a373f249469d7b516d2043f81aea37.tar.xz glibc-6edaa12b41a373f249469d7b516d2043f81aea37.zip | |
riscv: add support for static PIE
In order to support static PIE the startup code must avoid relocations before __libc_start_main is called.
| -rw-r--r-- | sysdeps/riscv/start.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sysdeps/riscv/start.S b/sysdeps/riscv/start.S index 0a1f713742..ede186ef23 100644 --- a/sysdeps/riscv/start.S +++ b/sysdeps/riscv/start.S @@ -50,7 +50,13 @@ ENTRY (ENTRY_POINT) call load_gp mv a5, a0 /* rtld_fini. */ /* 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 +#endif REG_L a1, 0(sp) /* argc. */ addi a2, sp, SZREG /* argv. */ andi sp, sp, ALMASK /* Align stack. */ @@ -62,6 +68,11 @@ ENTRY (ENTRY_POINT) ebreak 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 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 |