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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-10-25 13:10:54 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-10-26 15:39:59 +0100 |
| commit | a46c1b96f3949c2c15e130249094818981b06835 (patch) | |
| tree | c0f73b1999eb497d41ae0057ef8955770f629124 | |
| parent | 0e893e3d6823f8883a5b8ed9e9b0abbff3ace340 (diff) | |
| download | glibc-a46c1b96f3949c2c15e130249094818981b06835.tar.gz glibc-a46c1b96f3949c2c15e130249094818981b06835.tar.xz glibc-a46c1b96f3949c2c15e130249094818981b06835.zip | |
TODO: fix variadic syscalls
Only use as many varargs as accessible according to the bounds of c9. TODO: squash into original syscall support
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/clone.S | 5 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/syscall.S | 13 |
2 files changed, 18 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/clone.S b/sysdeps/unix/sysv/linux/aarch64/clone.S index 663853ab4a..4d7852304b 100644 --- a/sysdeps/unix/sysv/linux/aarch64/clone.S +++ b/sysdeps/unix/sysv/linux/aarch64/clone.S @@ -66,8 +66,13 @@ ENTRY(__clone) PTR_ARG (6) #else cbz x9, L(skip_args) + gclen x10, c9 ldr c4, [c9] + cmp x10, 16 + bls L(skip_args) ldr c5, [c9,16] + cmp x10, 32 + bls L(skip_args) ldr c6, [c9,32] L(skip_args): #endif diff --git a/sysdeps/unix/sysv/linux/aarch64/syscall.S b/sysdeps/unix/sysv/linux/aarch64/syscall.S index ec4688433d..43a81fc248 100644 --- a/sysdeps/unix/sysv/linux/aarch64/syscall.S +++ b/sysdeps/unix/sysv/linux/aarch64/syscall.S @@ -30,12 +30,25 @@ ENTRY (syscall) uxtw x8, w0 #ifdef __CHERI_PURE_CAPABILITY__ cbz x9, L(skip_args) + gclen x10, c9 ldr c0, [c9] + cmp x10, 16 + bls L(skip_args) ldr c1, [c9,16] + cmp x10, 32 + bls L(skip_args) ldr c2, [c9,32] + cmp x10, 48 + bls L(skip_args) ldr c3, [c9,48] + cmp x10, 64 + bls L(skip_args) ldr c4, [c9,64] + cmp x10, 80 + bls L(skip_args) ldr c5, [c9,80] + cmp x10, 96 + bls L(skip_args) ldr c6, [c9,96] L(skip_args): #else |