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| author | dchagin <dchagin@FreeBSD.org> | 2016-05-09 07:38:47 +0000 |
|---|---|---|
| committer | dchagin <dchagin@FreeBSD.org> | 2016-05-09 07:38:47 +0000 |
| commit | c62a8ee2d0de9c8b81ce15aca10928ad9780c175 (patch) | |
| tree | 43e0ac5ce4b5ffd1a9576204a9691a4b816a4eaa /sys/amd64 | |
| parent | b816032a05e1faaf4762b2b69357c3ab822794b8 (diff) | |
| download | FreeBSD-src-c62a8ee2d0de9c8b81ce15aca10928ad9780c175.zip FreeBSD-src-c62a8ee2d0de9c8b81ce15aca10928ad9780c175.tar.gz | |
Add a forgotten in r283424 .eh_frame section with CFI & FDE records to allow
stack unwinding through signal handler.
Reported by: Dmitry Sivachenko
MFC after: 2 weeks
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/linux/linux_locore.s | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sys/amd64/linux/linux_locore.s b/sys/amd64/linux/linux_locore.s index 5dcc09a..1bcf05b 100644 --- a/sys/amd64/linux/linux_locore.s +++ b/sys/amd64/linux/linux_locore.s @@ -29,6 +29,7 @@ NON_GPROF_ENTRY(linux_rt_sigcode) movq $LINUX_SYS_linux_rt_sigreturn,%rax /* linux_rt_sigreturn() */ syscall /* enter kernel with args */ hlt +.endrtsigcode: 0: jmp 0b NON_GPROF_ENTRY(__vdso_clock_gettime) @@ -74,3 +75,34 @@ NON_GPROF_ENTRY(__vdso_getcpu) .balign 4 .previous #endif + + .section .eh_frame,"a",@progbits +.LSTARTFRAMEDLSI0: + .long .LENDCIEDLSI0-.LSTARTCIEDLSI0 +.LSTARTCIEDLSI0: + .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 +.LENDCIEDLSI0: + .long .LENDFDEDLSI0-.LSTARTFDEDLSI0 /* Length FDE */ +.LSTARTFDEDLSI0: + .long .LSTARTFDEDLSI0-.LSTARTFRAMEDLSI0 /* CIE pointer */ + .long .startrtsigcode-. /* PC-relative start address */ + .long .endrtsigcode-.startrtsigcode + .uleb128 0 + .align 4 +.LENDFDEDLSI0: + .previous |
