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| author | John David Anglin <danglin@gcc.gnu.org> | 2022-01-02 17:12:45 +0000 |
|---|---|---|
| committer | John David Anglin <danglin@gcc.gnu.org> | 2022-01-02 17:12:45 +0000 |
| commit | 4620531ea988d6d2ede7c8f168074586ba64f482 (patch) | |
| tree | 5761f90e1956bf14948c46c97acbb91f78c50aa1 | |
| parent | 4759c16beec2a7a4ed56608adcf932f9a6acbdc7 (diff) | |
| download | gcc-4620531ea988d6d2ede7c8f168074586ba64f482.zip gcc-4620531ea988d6d2ede7c8f168074586ba64f482.tar.gz gcc-4620531ea988d6d2ede7c8f168074586ba64f482.tar.bz2 | |
Generate illegal instruction fault if LWS syscall returns -EFAULT.
2022-01-02 John David Anglin <danglin@gcc.gnu.org>
libgcc/ChangeLog:
* config/pa/linux-atomic.c (_ASM_EFAULT): Define.
(__kernel_cmpxchg): Nullify illegal iitlbp instruction if error
return is not equal _ASM_EFAULT.
(__kernel_cmpxchg2): Likewise.
| -rw-r--r-- | libgcc/config/pa/linux-atomic.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libgcc/config/pa/linux-atomic.c b/libgcc/config/pa/linux-atomic.c index 500a365..e4d74b2 100644 --- a/libgcc/config/pa/linux-atomic.c +++ b/libgcc/config/pa/linux-atomic.c @@ -28,6 +28,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #define EBUSY 16 #define ENOSYS 251 +#define _ASM_EFAULT "-14" + typedef unsigned char u8; typedef short unsigned int u16; #ifdef __LP64__ @@ -58,6 +60,8 @@ __kernel_cmpxchg (volatile void *mem, int oldval, int newval) register long lws_errno asm("r21"); asm volatile ( "ble 0xb0(%%sr2, %%r0) \n\t" "ldi %2, %%r20 \n\t" + "cmpiclr,<> " _ASM_EFAULT ", %%r21, %%r0\n\t" + "iitlbp %%r0,(%%sr0, %%r0) \n\t" : "=r" (lws_ret), "=r" (lws_errno) : "i" (LWS_CAS), "r" (lws_mem), "r" (lws_old), "r" (lws_new) : "r1", "r20", "r22", "r23", "r29", "r31", "memory" @@ -84,6 +88,8 @@ __kernel_cmpxchg2 (volatile void *mem, const void *oldval, const void *newval, register long lws_errno asm("r21"); asm volatile ( "ble 0xb0(%%sr2, %%r0) \n\t" "ldi %6, %%r20 \n\t" + "cmpiclr,<> " _ASM_EFAULT ", %%r21, %%r0\n\t" + "iitlbp %%r0,(%%sr0, %%r0) \n\t" : "=r" (lws_ret), "=r" (lws_errno), "+r" (lws_mem), "+r" (lws_old), "+r" (lws_new), "+r" (lws_size) : "i" (2) |