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caprevoke: Fix missing early-clobber in vm_do_cheri_revoke #2228

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merged 2 commits into from
Oct 23, 2024
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caprevoke: Fix missing early-clobber in vm_do_cheri_revoke #2228

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d5a8e04
caprevoke: morello: Fix missing early-clobber (#2227)
RoundofThree Oct 8, 2024
f5c60fd
caprevoke: riscv: Fix missing early-clobber (#2227)
RoundofThree Oct 8, 2024
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2 changes: 1 addition & 1 deletion sys/riscv/riscv/cheri_revoke_machdep.c
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Original file line number Diff line number Diff line change
Expand Up @@ -141,10 +141,10 @@
"beq x0, %[ok], 1f\n\t"
"sc.c.cap %[cutr], (%[cutp])\n\t"
"1:\n\t"
: [ok] "=r" (ok), [cscratch] "=&C" (cscratch),
: [ok] "=&r" (ok), [cscratch] "=&C" (cscratch),
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[cutr] "+C" (cutr)
: [cut] "C" (cut), [cutp] "C" (cutp)
: "memory");

Check warning on line 147 in sys/riscv/riscv/cheri_revoke_machdep.c

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Missing Signed-off-by: line

/* sc.c.cap clobbers its value operand with 0 on success */
if (__builtin_expect((uintcap_t)cutr == 0, 1)) {
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