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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-02-15 05:04:02 -0800 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-02-15 14:18:17 +0100 |
| commit | b65a82e4e757c1e6cb7073916a29bf7ff3170529 (patch) | |
| tree | 04a4e825ee9d2665934b27ce07e6cb9ddeb68831 /sysdeps | |
| parent | fe66db99f49e009ee4a89827fdb6bf97a6600c58 (diff) | |
| download | glibc-b65a82e4e757c1e6cb7073916a29bf7ff3170529.tar.gz glibc-b65a82e4e757c1e6cb7073916a29bf7ff3170529.tar.xz glibc-b65a82e4e757c1e6cb7073916a29bf7ff3170529.zip | |
hurd: Add THREAD_GET/SETMEM/_NC
Store them in the TCB, and use them for accessing _hurd_sigstate.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/mach/hurd/i386/tls.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/i386/tls.h b/sysdeps/mach/hurd/i386/tls.h index c0341ce2c9..7ec8c81a76 100644 --- a/sysdeps/mach/hurd/i386/tls.h +++ b/sysdeps/mach/hurd/i386/tls.h @@ -163,6 +163,114 @@ out: : "i" (offsetof (tcbhead_t, tcb))); \ __tcb;}) +/* Read member of the thread descriptor directly. */ +# define THREAD_GETMEM(descr, member) \ + ({ __typeof (descr->member) __value; \ + if (sizeof (__value) == 1) \ + asm volatile ("movb %%gs:%P2,%b0" \ + : "=q" (__value) \ + : "0" (0), "i" (offsetof (tcbhead_t, member))); \ + else if (sizeof (__value) == 4) \ + asm volatile ("movl %%gs:%P1,%0" \ + : "=r" (__value) \ + : "i" (offsetof (tcbhead_t, member))); \ + else \ + { \ + if (sizeof (__value) != 8) \ + /* There should not be any value with a size other than 1, \ + 4 or 8. */ \ + abort (); \ + \ + asm volatile ("movl %%gs:%P1,%%eax\n\t" \ + "movl %%gs:%P2,%%edx" \ + : "=A" (__value) \ + : "i" (offsetof (tcbhead_t, member)), \ + "i" (offsetof (tcbhead_t, member) + 4)); \ + } \ + __value; }) + + +/* Same as THREAD_GETMEM, but the member offset can be non-constant. */ +# define THREAD_GETMEM_NC(descr, member, idx) \ + ({ __typeof (descr->member[0]) __value; \ + if (sizeof (__value) == 1) \ + asm volatile ("movb %%gs:%P2(%3),%b0" \ + : "=q" (__value) \ + : "0" (0), "i" (offsetof (tcbhead_t, member[0])), \ + "r" (idx)); \ + else if (sizeof (__value) == 4) \ + asm volatile ("movl %%gs:%P1(,%2,4),%0" \ + : "=r" (__value) \ + : "i" (offsetof (tcbhead_t, member[0])), \ + "r" (idx)); \ + else \ + { \ + if (sizeof (__value) != 8) \ + /* There should not be any value with a size other than 1, \ + 4 or 8. */ \ + abort (); \ + \ + asm volatile ("movl %%gs:%P1(,%2,8),%%eax\n\t" \ + "movl %%gs:4+%P1(,%2,8),%%edx" \ + : "=&A" (__value) \ + : "i" (offsetof (tcbhead_t, member[0])), \ + "r" (idx)); \ + } \ + __value; }) + + + +/* Set member of the thread descriptor directly. */ +# define THREAD_SETMEM(descr, member, value) \ + ({ if (sizeof (descr->member) == 1) \ + asm volatile ("movb %b0,%%gs:%P1" : \ + : "iq" (value), \ + "i" (offsetof (tcbhead_t, member))); \ + else if (sizeof (descr->member) == 4) \ + asm volatile ("movl %0,%%gs:%P1" : \ + : "ir" (value), \ + "i" (offsetof (tcbhead_t, member))); \ + else \ + { \ + if (sizeof (descr->member) != 8) \ + /* There should not be any value with a size other than 1, \ + 4 or 8. */ \ + abort (); \ + \ + asm volatile ("movl %%eax,%%gs:%P1\n\t" \ + "movl %%edx,%%gs:%P2" : \ + : "A" ((uint64_t) cast_to_integer (value)), \ + "i" (offsetof (tcbhead_t, member)), \ + "i" (offsetof (tcbhead_t, member) + 4)); \ + }}) + + +/* Same as THREAD_SETMEM, but the member offset can be non-constant. */ +# define THREAD_SETMEM_NC(descr, member, idx, value) \ + ({ if (sizeof (descr->member[0]) == 1) \ + asm volatile ("movb %b0,%%gs:%P1(%2)" : \ + : "iq" (value), \ + "i" (offsetof (tcbhead_t, member)), \ + "r" (idx)); \ + else if (sizeof (descr->member[0]) == 4) \ + asm volatile ("movl %0,%%gs:%P1(,%2,4)" : \ + : "ir" (value), \ + "i" (offsetof (tcbhead_t, member)), \ + "r" (idx)); \ + else \ + { \ + if (sizeof (descr->member[0]) != 8) \ + /* There should not be any value with a size other than 1, \ + 4 or 8. */ \ + abort (); \ + \ + asm volatile ("movl %%eax,%%gs:%P1(,%2,8)\n\t" \ + "movl %%edx,%%gs:4+%P1(,%2,8)" : \ + : "A" ((uint64_t) cast_to_integer (value)), \ + "i" (offsetof (tcbhead_t, member)), \ + "r" (idx)); \ + }}) + /* Return the TCB address of a thread given its state. Note: this is expensive. */ # define THREAD_TCB(thread, thread_state) \ |