diff options
Diffstat (limited to 'arch/x86/ia32/ia32entry.S')
-rw-r--r-- | arch/x86/ia32/ia32entry.S | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S index ffc1bb4fed7..256b00b6189 100644 --- a/arch/x86/ia32/ia32entry.S +++ b/arch/x86/ia32/ia32entry.S | |||
@@ -39,11 +39,11 @@ | |||
39 | .endm | 39 | .endm |
40 | 40 | ||
41 | /* clobbers %eax */ | 41 | /* clobbers %eax */ |
42 | .macro CLEAR_RREGS | 42 | .macro CLEAR_RREGS _r9=rax |
43 | xorl %eax,%eax | 43 | xorl %eax,%eax |
44 | movq %rax,R11(%rsp) | 44 | movq %rax,R11(%rsp) |
45 | movq %rax,R10(%rsp) | 45 | movq %rax,R10(%rsp) |
46 | movq %rax,R9(%rsp) | 46 | movq %\_r9,R9(%rsp) |
47 | movq %rax,R8(%rsp) | 47 | movq %rax,R8(%rsp) |
48 | .endm | 48 | .endm |
49 | 49 | ||
@@ -52,11 +52,10 @@ | |||
52 | * We don't reload %eax because syscall_trace_enter() returned | 52 | * We don't reload %eax because syscall_trace_enter() returned |
53 | * the value it wants us to use in the table lookup. | 53 | * the value it wants us to use in the table lookup. |
54 | */ | 54 | */ |
55 | .macro LOAD_ARGS32 offset | 55 | .macro LOAD_ARGS32 offset, _r9=0 |
56 | movl \offset(%rsp),%r11d | 56 | .if \_r9 |
57 | movl \offset+8(%rsp),%r10d | ||
58 | movl \offset+16(%rsp),%r9d | 57 | movl \offset+16(%rsp),%r9d |
59 | movl \offset+24(%rsp),%r8d | 58 | .endif |
60 | movl \offset+40(%rsp),%ecx | 59 | movl \offset+40(%rsp),%ecx |
61 | movl \offset+48(%rsp),%edx | 60 | movl \offset+48(%rsp),%edx |
62 | movl \offset+56(%rsp),%esi | 61 | movl \offset+56(%rsp),%esi |
@@ -145,7 +144,7 @@ ENTRY(ia32_sysenter_target) | |||
145 | SAVE_ARGS 0,0,1 | 144 | SAVE_ARGS 0,0,1 |
146 | /* no need to do an access_ok check here because rbp has been | 145 | /* no need to do an access_ok check here because rbp has been |
147 | 32bit zero extended */ | 146 | 32bit zero extended */ |
148 | 1: movl (%rbp),%r9d | 147 | 1: movl (%rbp),%ebp |
149 | .section __ex_table,"a" | 148 | .section __ex_table,"a" |
150 | .quad 1b,ia32_badarg | 149 | .quad 1b,ia32_badarg |
151 | .previous | 150 | .previous |
@@ -157,7 +156,7 @@ ENTRY(ia32_sysenter_target) | |||
157 | cmpl $(IA32_NR_syscalls-1),%eax | 156 | cmpl $(IA32_NR_syscalls-1),%eax |
158 | ja ia32_badsys | 157 | ja ia32_badsys |
159 | sysenter_do_call: | 158 | sysenter_do_call: |
160 | IA32_ARG_FIXUP 1 | 159 | IA32_ARG_FIXUP |
161 | sysenter_dispatch: | 160 | sysenter_dispatch: |
162 | call *ia32_sys_call_table(,%rax,8) | 161 | call *ia32_sys_call_table(,%rax,8) |
163 | movq %rax,RAX-ARGOFFSET(%rsp) | 162 | movq %rax,RAX-ARGOFFSET(%rsp) |
@@ -234,20 +233,17 @@ sysexit_audit: | |||
234 | #endif | 233 | #endif |
235 | 234 | ||
236 | sysenter_tracesys: | 235 | sysenter_tracesys: |
237 | xchgl %r9d,%ebp | ||
238 | #ifdef CONFIG_AUDITSYSCALL | 236 | #ifdef CONFIG_AUDITSYSCALL |
239 | testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10) | 237 | testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10) |
240 | jz sysenter_auditsys | 238 | jz sysenter_auditsys |
241 | #endif | 239 | #endif |
242 | SAVE_REST | 240 | SAVE_REST |
243 | CLEAR_RREGS | 241 | CLEAR_RREGS |
244 | movq %r9,R9(%rsp) | ||
245 | movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */ | 242 | movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */ |
246 | movq %rsp,%rdi /* &pt_regs -> arg1 */ | 243 | movq %rsp,%rdi /* &pt_regs -> arg1 */ |
247 | call syscall_trace_enter | 244 | call syscall_trace_enter |
248 | LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ | 245 | LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ |
249 | RESTORE_REST | 246 | RESTORE_REST |
250 | xchgl %ebp,%r9d | ||
251 | cmpl $(IA32_NR_syscalls-1),%eax | 247 | cmpl $(IA32_NR_syscalls-1),%eax |
252 | ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */ | 248 | ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */ |
253 | jmp sysenter_do_call | 249 | jmp sysenter_do_call |
@@ -314,9 +310,9 @@ ENTRY(ia32_cstar_target) | |||
314 | testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) | 310 | testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) |
315 | CFI_REMEMBER_STATE | 311 | CFI_REMEMBER_STATE |
316 | jnz cstar_tracesys | 312 | jnz cstar_tracesys |
317 | cstar_do_call: | ||
318 | cmpl $IA32_NR_syscalls-1,%eax | 313 | cmpl $IA32_NR_syscalls-1,%eax |
319 | ja ia32_badsys | 314 | ja ia32_badsys |
315 | cstar_do_call: | ||
320 | IA32_ARG_FIXUP 1 | 316 | IA32_ARG_FIXUP 1 |
321 | cstar_dispatch: | 317 | cstar_dispatch: |
322 | call *ia32_sys_call_table(,%rax,8) | 318 | call *ia32_sys_call_table(,%rax,8) |
@@ -357,15 +353,13 @@ cstar_tracesys: | |||
357 | #endif | 353 | #endif |
358 | xchgl %r9d,%ebp | 354 | xchgl %r9d,%ebp |
359 | SAVE_REST | 355 | SAVE_REST |
360 | CLEAR_RREGS | 356 | CLEAR_RREGS r9 |
361 | movq %r9,R9(%rsp) | ||
362 | movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */ | 357 | movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */ |
363 | movq %rsp,%rdi /* &pt_regs -> arg1 */ | 358 | movq %rsp,%rdi /* &pt_regs -> arg1 */ |
364 | call syscall_trace_enter | 359 | call syscall_trace_enter |
365 | LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ | 360 | LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */ |
366 | RESTORE_REST | 361 | RESTORE_REST |
367 | xchgl %ebp,%r9d | 362 | xchgl %ebp,%r9d |
368 | movl RSP-ARGOFFSET(%rsp), %r8d | ||
369 | cmpl $(IA32_NR_syscalls-1),%eax | 363 | cmpl $(IA32_NR_syscalls-1),%eax |
370 | ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */ | 364 | ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */ |
371 | jmp cstar_do_call | 365 | jmp cstar_do_call |
@@ -577,8 +571,8 @@ ia32_sys_call_table: | |||
577 | .quad compat_sys_setrlimit /* 75 */ | 571 | .quad compat_sys_setrlimit /* 75 */ |
578 | .quad compat_sys_old_getrlimit /* old_getrlimit */ | 572 | .quad compat_sys_old_getrlimit /* old_getrlimit */ |
579 | .quad compat_sys_getrusage | 573 | .quad compat_sys_getrusage |
580 | .quad sys32_gettimeofday | 574 | .quad compat_sys_gettimeofday |
581 | .quad sys32_settimeofday | 575 | .quad compat_sys_settimeofday |
582 | .quad sys_getgroups16 /* 80 */ | 576 | .quad sys_getgroups16 /* 80 */ |
583 | .quad sys_setgroups16 | 577 | .quad sys_setgroups16 |
584 | .quad sys32_old_select | 578 | .quad sys32_old_select |