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Lines 51-57
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| 51 |
/* |
51 |
/* |
| 52 |
* Reload arg registers from stack in case ptrace changed them. |
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* Reload arg registers from stack in case ptrace changed them. |
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* We don't reload %eax because syscall_trace_enter() returned |
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* We don't reload %eax because syscall_trace_enter() returned |
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* the value it wants us to use in the table lookup. |
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* the %rax value we should see. Instead, we just truncate that |
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* value to 32 bits again as we did on entry from user mode. |
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* If it's a new value set by user_regset during entry tracing, |
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* this matches the normal truncation of the user-mode value. |
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* If it's -1 to make us punt the syscall, then (u32)-1 is still |
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* an appropriately invalid value. |
| 55 |
*/ |
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*/ |
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.macro LOAD_ARGS32 offset, _r9=0 |
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.macro LOAD_ARGS32 offset, _r9=0 |
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.if \_r9 |
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.if \_r9 |
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Lines 61-66
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| 61 |
movl \offset+48(%rsp),%edx |
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movl \offset+48(%rsp),%edx |
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movl \offset+56(%rsp),%esi |
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movl \offset+56(%rsp),%esi |
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movl \offset+64(%rsp),%edi |
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movl \offset+64(%rsp),%edi |
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movl %eax,%eax /* zero extension */ |
| 64 |
.endm |
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.endm |
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71 |
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| 66 |
.macro CFI_STARTPROC32 simple |
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.macro CFI_STARTPROC32 simple |
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Lines 165-171
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| 165 |
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) |
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testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) |
| 166 |
CFI_REMEMBER_STATE |
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CFI_REMEMBER_STATE |
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jnz sysenter_tracesys |
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jnz sysenter_tracesys |
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cmpl $(IA32_NR_syscalls-1),%eax |
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cmpq $(IA32_NR_syscalls-1),%rax |
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ja ia32_badsys |
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ja ia32_badsys |
| 170 |
sysenter_do_call: |
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sysenter_do_call: |
| 171 |
IA32_ARG_FIXUP |
177 |
IA32_ARG_FIXUP |
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Lines 212-218
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| 212 |
movl $AUDIT_ARCH_I386,%edi /* 1st arg: audit arch */ |
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movl $AUDIT_ARCH_I386,%edi /* 1st arg: audit arch */ |
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call audit_syscall_entry |
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call audit_syscall_entry |
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movl RAX-ARGOFFSET(%rsp),%eax /* reload syscall number */ |
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movl RAX-ARGOFFSET(%rsp),%eax /* reload syscall number */ |
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cmpl $(IA32_NR_syscalls-1),%eax |
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cmpq $(IA32_NR_syscalls-1),%rax |
| 216 |
ja ia32_badsys |
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ja ia32_badsys |
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movl %ebx,%edi /* reload 1st syscall arg */ |
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movl %ebx,%edi /* reload 1st syscall arg */ |
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movl RCX-ARGOFFSET(%rsp),%esi /* reload 2nd syscall arg */ |
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movl RCX-ARGOFFSET(%rsp),%esi /* reload 2nd syscall arg */ |
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Lines 265-271
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| 265 |
call syscall_trace_enter |
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call syscall_trace_enter |
| 266 |
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ |
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LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ |
| 267 |
RESTORE_REST |
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RESTORE_REST |
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cmpl $(IA32_NR_syscalls-1),%eax |
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cmpq $(IA32_NR_syscalls-1),%rax |
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ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */ |
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ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */ |
| 270 |
jmp sysenter_do_call |
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jmp sysenter_do_call |
| 271 |
CFI_ENDPROC |
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CFI_ENDPROC |
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Lines 342-348
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| 342 |
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) |
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testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) |
| 343 |
CFI_REMEMBER_STATE |
349 |
CFI_REMEMBER_STATE |
| 344 |
jnz cstar_tracesys |
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jnz cstar_tracesys |
| 345 |
cmpl $IA32_NR_syscalls-1,%eax |
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cmpq $IA32_NR_syscalls-1,%rax |
| 346 |
ja ia32_badsys |
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ja ia32_badsys |
| 347 |
cstar_do_call: |
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cstar_do_call: |
| 348 |
IA32_ARG_FIXUP 1 |
354 |
IA32_ARG_FIXUP 1 |
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Lines 400-406
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| 400 |
LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */ |
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LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */ |
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RESTORE_REST |
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RESTORE_REST |
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xchgl %ebp,%r9d |
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xchgl %ebp,%r9d |
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cmpl $(IA32_NR_syscalls-1),%eax |
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cmpq $(IA32_NR_syscalls-1),%rax |
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ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */ |
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ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */ |
| 405 |
jmp cstar_do_call |
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jmp cstar_do_call |
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END(ia32_cstar_target) |
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END(ia32_cstar_target) |
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Lines 463-469
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| 463 |
orl $TS_COMPAT,TI_status(%r10) |
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orl $TS_COMPAT,TI_status(%r10) |
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testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) |
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testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) |
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jnz ia32_tracesys |
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jnz ia32_tracesys |
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cmpl $(IA32_NR_syscalls-1),%eax |
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cmpq $(IA32_NR_syscalls-1),%rax |
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ja ia32_badsys |
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ja ia32_badsys |
| 468 |
ia32_do_call: |
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ia32_do_call: |
| 469 |
IA32_ARG_FIXUP |
475 |
IA32_ARG_FIXUP |
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Lines 482-488
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| 482 |
call syscall_trace_enter |
488 |
call syscall_trace_enter |
| 483 |
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ |
489 |
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ |
| 484 |
RESTORE_REST |
490 |
RESTORE_REST |
| 485 |
cmpl $(IA32_NR_syscalls-1),%eax |
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cmpq $(IA32_NR_syscalls-1),%rax |
| 486 |
ja int_ret_from_sys_call /* ia32_tracesys has set RAX(%rsp) */ |
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ja int_ret_from_sys_call /* ia32_tracesys has set RAX(%rsp) */ |
| 487 |
jmp ia32_do_call |
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jmp ia32_do_call |
| 488 |
END(ia32_syscall) |
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END(ia32_syscall) |
