kernel/vdso/sigtramp32.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * Signal trampolines for 32 bits processes in a ppc64 kernel for
16 /* The nop here is a hack.  The dwarf2 unwind routines subtract 1 from
18    call instruction.  Since we don't have a call here, we artificially
19    extend the range covered by the unwind info by adding a nop before
23 .Lsig_start = . - 4
37 	.section .eh_frame,"a",@progbits
39 /* Register r1 can be found at offset 4 of a pt_regs structure.
40    A pointer to the pt_regs is stored in memory at the old sp plus PTREGS.  */
43   .uleb128 9f - 1f;		/*   length */				\
44 1:									\
49 9:
51 /* Register REGNO can be found at offset OFS of a pt_regs structure.
52    A pointer to the pt_regs is stored in memory at the old sp plus PTREGS.  */
56   .uleb128 9f - 1f;		/*   length */				\
57 1:									\
63 9:
65 /* If msr bit 1<<25 is set, then VMX register REGNO is at offset REGNO*16
72   .uleb128 9f - 1f;		/*   length */				\
73 1:									\
85   .byte 0x0c; .long 1 << 25;	/*     DW_OP_const4u */			\
95 9:
97 /* If msr bit 1<<25 is set, then VMX register REGNO is at offset REGNO*16
98    of the VMX reg struct.  REGNO is 1 thru 31.  */
102   .uleb128 9f - 1f;		/*   length */				\
103 1:									\
105   .byte 0x2f; .short 2b - 9f;	/*     DW_OP_skip */			\
106 9:
108 /* If msr bit 1<<25 is set, then VMX register REGNO is at offset OFS of
113   .uleb128 9f - 1f;		/*   length */				\
114 1:									\
116   .byte 0x2f; .short 3b - 9f;	/*     DW_OP_skip */			\
117 9:
123   .uleb128 9f - 1f;		/*   length */				\
124 1:									\
129 9:
151   rsave ( 9,  9*RSIZE);							\
181   rsave (33, 48*RSIZE +  1*8);						\
189   rsave (41, 48*RSIZE +  9*8);						\
217   vsave_msr1 ( 1);							\
225   vsave_msr1 ( 9);							\
255 	.long .Lcie_end - .Lcie_start
258 	.byte 1			/* Version number */
259 	.string "zRS"		/* NUL-terminated augmentation string */
261 	.sleb128 -4		/* Data alignment factor */
263 	.uleb128 1		/* Augmentation value length */
265 	.byte 0x0c,1,0		/* DW_CFA_def_cfa: r1 ofs 0 */
269 	.long .Lfde0_end - .Lfde0_start
271 	.long .Lfde0_start - .Lcie	/* CIE pointer. */
272 	.long .Lsig_start - .		/* PC start, length */
273 	.long .Lsig_end - .Lsig_start
281 /* We have a different stack layout for rt_sigreturn.  */
285 	.long .Lfde1_end - .Lfde1_start
287 	.long .Lfde1_start - .Lcie	/* CIE pointer. */
288 	.long .Lsigrt_start - .		/* PC start, length */
289 	.long .Lsigrt_end - .Lsigrt_start