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Merge tag 'objtool-core-2021-02-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull objtool updates from Thomas Gleixner:

 - Make objtool work for big-endian cross compiles

 - Make stack tracking via stack pointer memory operations match
   push/pop semantics to prepare for architectures w/o PUSH/POP
   instructions.

 - Add support for analyzing alternatives

 - Improve retpoline detection and handling

 - Improve assembly code coverage on x86

 - Provide support for inlined stack switching

* tag 'objtool-core-2021-02-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
  objtool: Support stack-swizzle
  objtool,x86: Additionally decode: mov %rsp, (%reg)
  x86/unwind/orc: Change REG_SP_INDIRECT
  x86/power: Support objtool validation in hibernate_asm_64.S
  x86/power: Move restore_registers() to top of the file
  x86/power: Annotate indirect branches as safe
  x86/acpi: Support objtool validation in wakeup_64.S
  x86/acpi: Annotate indirect branch as safe
  x86/ftrace: Support objtool vmlinux.o validation in ftrace_64.S
  x86/xen/pvh: Annotate indirect branch as safe
  x86/xen: Support objtool vmlinux.o validation in xen-head.S
  x86/xen: Support objtool validation in xen-asm.S
  objtool: Add xen_start_kernel() to noreturn list
  objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC
  objtool: Add asm version of STACK_FRAME_NON_STANDARD
  objtool: Assume only ELF functions do sibling calls
  x86/ftrace: Add UNWIND_HINT_FUNC annotation for ftrace_stub
  objtool: Support retpoline jump detection for vmlinux.o
  objtool: Fix ".cold" section suffix check for newer versions of GCC
  objtool: Fix retpoline detection in asm code
  ...
This commit is contained in:
Linus Torvalds
2021-02-23 09:56:13 -08:00
parent 79db4d2293 aafeb14e9d
commit a56ff24efb
49 changed files with 997 additions and 632 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
tools/arch/x86/include/asm/insn.h
View File

@@ -7,9 +7,12 @@
* Copyright (C) IBM Corporation, 2009
*/
#include <asm/byteorder.h>
/* insn_attr_t is defined in inat.h */
#include "inat.h"
#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
struct insn_field {
union {
insn_value_t value;
@@ -20,6 +23,48 @@ struct insn_field {
unsigned char nbytes;
};
static inline void insn_field_set(struct insn_field *p, insn_value_t v,
unsigned char n)
{
p->value = v;
p->nbytes = n;
}
static inline void insn_set_byte(struct insn_field *p, unsigned char n,
insn_byte_t v)
{
p->bytes[n] = v;
}
#else
struct insn_field {
insn_value_t value;
union {
insn_value_t little;
insn_byte_t bytes[4];
};
/* !0 if we've run insn_get_xxx() for this field */
unsigned char got;
unsigned char nbytes;
};
static inline void insn_field_set(struct insn_field *p, insn_value_t v,
unsigned char n)
{
p->value = v;
p->little = __cpu_to_le32(v);
p->nbytes = n;
}
static inline void insn_set_byte(struct insn_field *p, unsigned char n,
insn_byte_t v)
{
p->bytes[n] = v;
p->value = __le32_to_cpu(p->little);
}
#endif
struct insn {
struct insn_field prefixes; /*
* Prefixes

10
tools/arch/x86/include/asm/orc_types.h
View File

@@ -40,6 +40,8 @@
#define ORC_REG_MAX 15
#ifndef __ASSEMBLY__
#include <asm/byteorder.h>
/*
* This struct is more or less a vastly simplified version of the DWARF Call
* Frame Information standard. It contains only the necessary parts of DWARF
@@ -51,10 +53,18 @@
struct orc_entry {
s16 sp_offset;
s16 bp_offset;
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned sp_reg:4;
unsigned bp_reg:4;
unsigned type:2;
unsigned end:1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bp_reg:4;
unsigned sp_reg:4;
unsigned unused:5;
unsigned end:1;
unsigned type:2;
#endif
} __packed;
#endif /* __ASSEMBLY__ */