vasilito
dc68054305
- Restore 29 recipe symlinks (libdrm, qtbase, dbus, sddm, pipewire, etc.) - Restore 33 patches (KDE, libdrm, mesa, pipewire, sddm, wireplumber) - Restore 20+ local/scripts (audit, lint, test, build helpers) - Restore src/cook/scheduler.rs, status.rs, gnu-config/ - Restore scripts/patch-inclusion-gate.sh, run_mini1.sh, validate-collision-log.sh - Recover TLC source from HEAD (was overwritten by 0.2.3 checkout) - Recover 11 local/docs plans from HEAD (were overwritten) - Recover qt6-wayland-smoke symlink from HEAD - Fix MOTD: remove garbled ASCII art, use clean text - Update version: 0.2.0 -> 0.2.4 in os-release, motd, config - Reduce filesystem_size: 1536 -> 512 MiB - Add ABSOLUTE RULE to AGENTS.md: never delete/ignore packages - Reduce pcid scheme log verbosity: info -> debug
114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_FRAME_H
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#define _ASM_X86_FRAME_H
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#include <asm/asm.h>
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/*
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* These are stack frame creation macros. They should be used by every
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* callable non-leaf asm function to make kernel stack traces more reliable.
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*/
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#ifdef CONFIG_FRAME_POINTER
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#ifdef __ASSEMBLER__
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.macro FRAME_BEGIN
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push %_ASM_BP
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_ASM_MOV %_ASM_SP, %_ASM_BP
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.endm
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.macro FRAME_END
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pop %_ASM_BP
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.endm
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#ifdef CONFIG_X86_64
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/*
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* This is a sneaky trick to help the unwinder find pt_regs on the stack. The
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* frame pointer is replaced with an encoded pointer to pt_regs. The encoding
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* is just setting the LSB, which makes it an invalid stack address and is also
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* a signal to the unwinder that it's a pt_regs pointer in disguise.
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*
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* NOTE: This macro must be used *after* PUSH_AND_CLEAR_REGS because it corrupts
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* the original rbp.
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*/
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.macro ENCODE_FRAME_POINTER ptregs_offset=0
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leaq 1+\ptregs_offset(%rsp), %rbp
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.endm
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#else /* !CONFIG_X86_64 */
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/*
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* This is a sneaky trick to help the unwinder find pt_regs on the stack. The
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* frame pointer is replaced with an encoded pointer to pt_regs. The encoding
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* is just clearing the MSB, which makes it an invalid stack address and is also
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* a signal to the unwinder that it's a pt_regs pointer in disguise.
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*
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* NOTE: This macro must be used *after* SAVE_ALL because it corrupts the
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* original ebp.
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*/
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.macro ENCODE_FRAME_POINTER
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mov %esp, %ebp
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andl $0x7fffffff, %ebp
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.endm
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#endif /* CONFIG_X86_64 */
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#else /* !__ASSEMBLER__ */
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#define FRAME_BEGIN \
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"push %" _ASM_BP "\n" \
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_ASM_MOV "%" _ASM_SP ", %" _ASM_BP "\n"
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#define FRAME_END "pop %" _ASM_BP "\n"
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#ifdef CONFIG_X86_64
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#define ENCODE_FRAME_POINTER \
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"lea 1(%rsp), %rbp\n\t"
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static inline unsigned long encode_frame_pointer(struct pt_regs *regs)
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{
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return (unsigned long)regs + 1;
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}
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#else /* !CONFIG_X86_64 */
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#define ENCODE_FRAME_POINTER \
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"movl %esp, %ebp\n\t" \
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"andl $0x7fffffff, %ebp\n\t"
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static inline unsigned long encode_frame_pointer(struct pt_regs *regs)
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{
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return (unsigned long)regs & 0x7fffffff;
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}
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#endif /* CONFIG_X86_64 */
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#endif /* __ASSEMBLER__ */
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#define FRAME_OFFSET __ASM_SEL(4, 8)
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#else /* !CONFIG_FRAME_POINTER */
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#ifdef __ASSEMBLER__
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.macro ENCODE_FRAME_POINTER ptregs_offset=0
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.endm
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#else /* !__ASSEMBLER__ */
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#define ENCODE_FRAME_POINTER
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static inline unsigned long encode_frame_pointer(struct pt_regs *regs)
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{
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return 0;
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}
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#endif
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#define FRAME_BEGIN
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#define FRAME_END
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#define FRAME_OFFSET 0
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#endif /* CONFIG_FRAME_POINTER */
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#endif /* _ASM_X86_FRAME_H */
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