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186e3d943a
linux/arch/sh/kernel/vsyscall/vsyscall-trapa.S

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sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 09:33:49 +00:00
.text
.globl __kernel_vsyscall
.type __kernel_vsyscall,@function
__kernel_vsyscall:
.LSTART_vsyscall:
sh: vsyscall: Fix up .eh_frame generation. Some improper formatting caused the .eh_frame generation to fail, resulting in gcc/g++ testsuite failures with regards to unwinding through the vDSO. Now that someone is actually working on this on the gcc side it's time to fix up the kernel side, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-30 10:42:26 +00:00
trapa #0x10
nop
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 09:33:49 +00:00
.LEND_vsyscall:
.size __kernel_vsyscall,.-.LSTART_vsyscall
sh: vsyscall: Fix up .eh_frame generation. Some improper formatting caused the .eh_frame generation to fail, resulting in gcc/g++ testsuite failures with regards to unwinding through the vDSO. Now that someone is actually working on this on the gcc side it's time to fix up the kernel side, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-30 10:42:26 +00:00
.previous
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 09:33:49 +00:00
.section .eh_frame,"a",@progbits
.LCIE:
.ualong .LCIE_end - .LCIE_start
.LCIE_start:
.ualong 0 /* CIE ID */
.byte 0x1 /* Version number */
sh: vsyscall: Fix up .eh_frame generation. Some improper formatting caused the .eh_frame generation to fail, resulting in gcc/g++ testsuite failures with regards to unwinding through the vDSO. Now that someone is actually working on this on the gcc side it's time to fix up the kernel side, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-30 10:42:26 +00:00
.string "zR" /* NUL-terminated augmentation string */
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 09:33:49 +00:00
.uleb128 0x1 /* Code alignment factor */
.sleb128 -4 /* Data alignment factor */
.byte 0x11 /* Return address register column */
sh: vsyscall: Fix up .eh_frame generation. Some improper formatting caused the .eh_frame generation to fail, resulting in gcc/g++ testsuite failures with regards to unwinding through the vDSO. Now that someone is actually working on this on the gcc side it's time to fix up the kernel side, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-30 10:42:26 +00:00
.uleb128 0x1 /* Augmentation length and data */
.byte 0x1b /* DW_EH_PE_pcrel | DW_EH_PE_sdata4. */
.byte 0xc,0xf,0x0 /* DW_CFA_def_cfa: r15 ofs 0 */
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 09:33:49 +00:00
.align 2
.LCIE_end:
.ualong .LFDE_end-.LFDE_start /* Length FDE */
.LFDE_start:
sh: vsyscall: Fix up .eh_frame generation. Some improper formatting caused the .eh_frame generation to fail, resulting in gcc/g++ testsuite failures with regards to unwinding through the vDSO. Now that someone is actually working on this on the gcc side it's time to fix up the kernel side, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-30 10:42:26 +00:00
.ualong .LFDE_start-.LCIE /* CIE pointer */
.ualong .LSTART_vsyscall-. /* PC-relative start address */
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 09:33:49 +00:00
.ualong .LEND_vsyscall-.LSTART_vsyscall
sh: vsyscall: Fix up .eh_frame generation. Some improper formatting caused the .eh_frame generation to fail, resulting in gcc/g++ testsuite failures with regards to unwinding through the vDSO. Now that someone is actually working on this on the gcc side it's time to fix up the kernel side, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-30 10:42:26 +00:00
.uleb128 0 /* Augmentation */
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 09:33:49 +00:00
.align 2
.LFDE_end:
.previous
/* Get the common code for the sigreturn entry points */
#include "vsyscall-sigreturn.S"
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