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[sanitizer_common] Fix GetArgsAndEnv on Linux/sparc64 #109109

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merged 1 commit into from
Sep 24, 2024
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[sanitizer_common] Fix GetArgsAndEnv on Linux/sparc64 #109109

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5 changes: 5 additions & 0 deletions compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -725,6 +725,11 @@ static void GetArgsAndEnv(char ***argv, char ***envp) {
# if !SANITIZER_GO
if (&__libc_stack_end) {
uptr *stack_end = (uptr *)__libc_stack_end;
// Linux/sparc64 needs an adjustment, cf. glibc
// sysdeps/sparc/sparc{32,64}/dl-machine.h (DL_STACK_END).
# if SANITIZER_LINUX && defined(__sparc__)
stack_end = &stack_end[16];
# endif
// Normally argc can be obtained from *stack_end, however, on ARM glibc's
// _start clobbers it:
// https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/arm/start.S;hb=refs/heads/release/2.31/master#l75
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