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| author | Aurelien Jarno <aurelien@aurel32.net> | 2021-12-16 00:06:28 +0100 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2021-12-17 20:29:34 +0100 |
| commit | 225da459cebef1037dcd78b56471edc0721e1c41 (patch) | |
| tree | 717a875f9560c97c016761183c9bdfaac73b482c /sysdeps/riscv/dl-machine.h | |
| parent | d2e594d71509faf36cf851a69370db34a4f5fa65 (diff) | |
| download | glibc-225da459cebef1037dcd78b56471edc0721e1c41.tar.gz glibc-225da459cebef1037dcd78b56471edc0721e1c41.tar.xz glibc-225da459cebef1037dcd78b56471edc0721e1c41.zip | |
riscv: align stack before calling _dl_init [BZ #28703]
Align the stack pointer to 128 bits during the call to _dl_init() as specified by the RISC-V ABI [1]. This fixes the elf/tst-align2 test. Fixes bug 28703. [1] https://github.com/riscv-non-isa/riscv-elf-psabi-doc
Diffstat (limited to 'sysdeps/riscv/dl-machine.h')
| -rw-r--r-- | sysdeps/riscv/dl-machine.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sysdeps/riscv/dl-machine.h b/sysdeps/riscv/dl-machine.h index ce2b3c3875..f457a41c70 100644 --- a/sysdeps/riscv/dl-machine.h +++ b/sysdeps/riscv/dl-machine.h @@ -125,8 +125,14 @@ elf_machine_dynamic (void) sll a3, a1, " STRINGXP (PTRLOG) "\n\ add a3, a3, a2\n\ add a3, a3, " STRINGXP (SZREG) "\n\ + # Stash the stack pointer in s1.\n\ + mv s1, sp\n\ + # Align stack to 128 bits for the _dl_init call.\n\ + andi sp, sp,-16\n\ # Call the function to run the initializers.\n\ jal _dl_init\n\ + # Restore the stack pointer for _start.\n\ + mv sp, s1\n\ # Pass our finalizer function to _start.\n\ lla a0, _dl_fini\n\ # Jump to the user entry point.\n\ |