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| author | Shravan Narayan <shravanrn@gmail.com> | 2024-11-07 19:57:52 -0600 |
|---|---|---|
| committer | Shravan Narayan <shravanrn@gmail.com> | 2024-11-11 17:21:55 -0600 |
| commit | 94c25a93c5ee81939bd1acfee06808f6745883ce (patch) | |
| tree | 3645a692b9b9dee9bad53765293f5f139857e310 | |
| parent | c7c89685fe7512d315d0a58e965c66b8e6a77be4 (diff) | |
| download | wabt-94c25a93c5ee81939bd1acfee06808f6745883ce.tar.gz wabt-94c25a93c5ee81939bd1acfee06808f6745883ce.tar.bz2 wabt-94c25a93c5ee81939bd1acfee06808f6745883ce.zip | |
wasm2c: minor code cleanup for OS checks for segue
Define the fsgabase capability lookup to
HWCAP2_FSGSBASE as per
https://www.kernel.org/doc/html/latest/arch/x86/x86_64/fsgs.html#fsgsbase-instructions-enablement
| -rw-r--r-- | wasm2c/wasm-rt-impl.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/wasm2c/wasm-rt-impl.c b/wasm2c/wasm-rt-impl.c index 92616351..20137b80 100644 --- a/wasm2c/wasm-rt-impl.c +++ b/wasm2c/wasm-rt-impl.c @@ -60,6 +60,10 @@ bool wasm_rt_fsgsbase_inst_supported = false; #include <asm/prctl.h> // For ARCH_SET_GS #include <sys/syscall.h> // For SYS_arch_prctl #include <unistd.h> // For syscall + +#ifndef HWCAP2_FSGSBASE +#define HWCAP2_FSGSBASE (1 << 1) +#endif #endif #if WASM_RT_SEGUE_FREE_SEGMENT @@ -245,7 +249,7 @@ void wasm_rt_init(void) { #if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 18 // Check for support for userspace wrgsbase instructions unsigned long val = getauxval(AT_HWCAP2); - wasm_rt_fsgsbase_inst_supported = val & (1 << 1); + wasm_rt_fsgsbase_inst_supported = val & HWCAP2_FSGSBASE; #endif #endif |