157 lines
3.9 KiB
ArmAsm
157 lines
3.9 KiB
ArmAsm
/* $FreeBSD$ */
|
|
|
|
#include "linux32_assym.h" /* system definitions */
|
|
#include <machine/asmacros.h> /* miscellaneous asm macros */
|
|
|
|
#include <amd64/linux32/linux32_syscall.h> /* system call numbers */
|
|
|
|
.data
|
|
|
|
.globl linux_platform
|
|
linux_platform:
|
|
.asciz "i686"
|
|
|
|
.text
|
|
.code32
|
|
|
|
/*
|
|
* To avoid excess stack frame the signal trampoline code emulates
|
|
* the 'call' instruction.
|
|
*/
|
|
NON_GPROF_ENTRY(linux32_sigcode)
|
|
movl %esp, %ebx /* preserve sigframe */
|
|
call .getip0
|
|
.getip0:
|
|
popl %eax
|
|
add $.startsigcode-.getip0, %eax /* ret address */
|
|
push %eax
|
|
jmp *LINUX_SIGF_HANDLER(%ebx)
|
|
.startsigcode:
|
|
popl %eax
|
|
movl $LINUX32_SYS_linux_sigreturn,%eax /* linux_sigreturn() */
|
|
int $0x80 /* enter kernel with args */
|
|
.endsigcode:
|
|
0: jmp 0b
|
|
|
|
NON_GPROF_ENTRY(linux32_rt_sigcode)
|
|
leal LINUX_RT_SIGF_UC(%esp),%ebx /* linux ucp */
|
|
leal LINUX_RT_SIGF_SC(%ebx),%ecx /* linux sigcontext */
|
|
movl %esp, %edi
|
|
call .getip1
|
|
.getip1:
|
|
popl %eax
|
|
add $.startrtsigcode-.getip1, %eax /* ret address */
|
|
push %eax
|
|
jmp *LINUX_RT_SIGF_HANDLER(%edi)
|
|
.startrtsigcode:
|
|
movl $LINUX32_SYS_linux_rt_sigreturn,%eax /* linux_rt_sigreturn() */
|
|
int $0x80 /* enter kernel with args */
|
|
.endrtsigcode:
|
|
0: jmp 0b
|
|
|
|
NON_GPROF_ENTRY(linux32_vsyscall)
|
|
.startvsyscall:
|
|
int $0x80
|
|
ret
|
|
.endvsyscall:
|
|
|
|
#if 0
|
|
.section .note.Linux, "a",@note
|
|
.long 2f - 1f /* namesz */
|
|
.balign 4
|
|
.long 4f - 3f /* descsz */
|
|
.long 0
|
|
1:
|
|
.asciz "Linux"
|
|
2:
|
|
.balign 4
|
|
3:
|
|
.long LINUX_VERSION_CODE
|
|
4:
|
|
.balign 4
|
|
.previous
|
|
#endif
|
|
|
|
#define do_cfa_expr(offset) \
|
|
.byte 0x0f; /* DW_CFA_def_cfa_expression */ \
|
|
.uleb128 11f-10f; /* length */ \
|
|
10: .byte 0x74; /* DW_OP_breg4 */ \
|
|
.sleb128 offset; /* offset */ \
|
|
.byte 0x06; /* DW_OP_deref */ \
|
|
11:
|
|
|
|
|
|
/* CIE */
|
|
.section .eh_frame,"a",@progbits
|
|
.LSTARTFRAMEDLSI1:
|
|
.long .LENDCIEDLSI1-.LSTARTCIEDLSI1
|
|
.LSTARTCIEDLSI1:
|
|
.long 0 /* CIE ID */
|
|
.byte 1 /* Version number */
|
|
.string "zRS" /* NULL-terminated
|
|
* augmentation string
|
|
*/
|
|
.uleb128 1 /* Code alignment factor */
|
|
.sleb128 -4 /* Data alignment factor */
|
|
.byte 8 /* Return address
|
|
* register column
|
|
*/
|
|
.uleb128 1 /* Augmentation value length */
|
|
.byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
|
|
.byte 0 /* DW_CFA_nop */
|
|
.align 4
|
|
.LENDCIEDLSI1:
|
|
|
|
/* FDE */
|
|
.long .LENDFDEDLSI1-.LSTARTFDEDLSI1 /* Length FDE */
|
|
.LSTARTFDEDLSI1:
|
|
.long .LSTARTFDEDLSI1-.LSTARTFRAMEDLSI1 /* CIE pointer */
|
|
.long .startsigcode-. /* PC-relative start address */
|
|
.long .endsigcode-.startsigcode
|
|
.uleb128 0 /* Augmentation */
|
|
do_cfa_expr(LINUX_SIGF_SC-8)
|
|
.align 4
|
|
.LENDFDEDLSI1:
|
|
|
|
.long .LENDFDEDLSI2-.LSTARTFDEDLSI2 /* Length FDE */
|
|
.LSTARTFDEDLSI2:
|
|
.long .LSTARTFDEDLSI2-.LSTARTFRAMEDLSI1 /* CIE pointer */
|
|
.long .startrtsigcode-. /* PC-relative start address */
|
|
.long .endrtsigcode-.startrtsigcode
|
|
.uleb128 0 /* Augmentation */
|
|
do_cfa_expr(LINUX_RT_SIGF_SC-4+LINUX_SC_ESP)
|
|
.align 4
|
|
.LENDFDEDLSI2:
|
|
.previous
|
|
|
|
.section .eh_frame,"a",@progbits
|
|
.LSTARTFRAMEDLSI2:
|
|
.long .LENDCIEDLSI2-.LSTARTCIEDLSI2
|
|
.LSTARTCIEDLSI2:
|
|
.long 0 /* CIE ID */
|
|
.byte 1 /* Version number */
|
|
.string "zR" /* NULL-terminated
|
|
* augmentation string
|
|
*/
|
|
.uleb128 1 /* Code alignment factor */
|
|
.sleb128 -4 /* Data alignment factor */
|
|
.byte 8 /* Return address register column */
|
|
.uleb128 1 /* Augmentation value length */
|
|
.byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
|
|
.byte 0x0c /* DW_CFA_def_cfa */
|
|
.uleb128 4
|
|
.uleb128 4
|
|
.byte 0x88 /* DW_CFA_offset, column 0x8 */
|
|
.uleb128 1
|
|
.align 4
|
|
.LENDCIEDLSI2:
|
|
.long .LENDFDEDLSI3-.LSTARTFDEDLSI3 /* Length FDE */
|
|
.LSTARTFDEDLSI3:
|
|
.long .LSTARTFDEDLSI3-.LSTARTFRAMEDLSI2 /* CIE pointer */
|
|
.long .startvsyscall-. /* PC-relative start address */
|
|
.long .endvsyscall-.startvsyscall
|
|
.uleb128 0
|
|
.align 4
|
|
.LENDFDEDLSI3:
|
|
.previous
|