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Separate mmap area from program loading (relocation) area

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We need to separate the two because the heap of a PIE is created in
the area to which it is mapped.

Related commits:

b1309a5d: PIE is mapped at map_end instead of at
          user_start
c4219655: Interpreter is mapped to map_start to make a
          system call that dereferences a NULL pointer fail

[dominique.martinet@cea.fr: Also add ULONG_MAX and friend macroes,
 used for data_min]
[ken.sato.ty@hitachi-solutions.com: fix execve]
Change-Id: I8ecaf22b7965090ab67bebece57c68283ba23664
This commit is contained in:
Masamichi Takagi
2019-01-15 09:48:28 +00:00
committed by Dominique Martinet
parent 97e0219f50
commit 4d215de641
5 changed files with 31 additions and 19 deletions
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4
arch/arm64/kernel/include/arch-memory.h
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@ -57,6 +57,7 @@ extern char _end[];
#if (VA_BITS == 39 && GRANULE_SIZE == _SZ4KB)
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000000400000000)
# define TASK_UNMAPPED_BASE UL(0x0000000800000000)
# define USER_END UL(0x0000002000000000)
# define MAP_VMAP_START UL(0xffffffbdc0000000)
@ -67,6 +68,7 @@ extern char _end[];
#
#elif (VA_BITS == 42 && GRANULE_SIZE == _SZ64KB)
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000002000000000)
# define TASK_UNMAPPED_BASE UL(0x0000004000000000)
# define USER_END UL(0x0000010000000000)
# define MAP_VMAP_START UL(0xfffffdfee0000000)
@ -77,6 +79,7 @@ extern char _end[];
#
#elif (VA_BITS == 48 && GRANULE_SIZE == _SZ4KB)
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000080000000000)
# define TASK_UNMAPPED_BASE UL(0x0000100000000000)
# define USER_END UL(0x0000400000000000)
# define MAP_VMAP_START UL(0xffff7bffc0000000)
@ -87,6 +90,7 @@ extern char _end[];
#
#elif (VA_BITS == 48 && GRANULE_SIZE == _SZ64KB)
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000080000000000)
# define TASK_UNMAPPED_BASE UL(0x0000100000000000)
# define USER_END UL(0x0000400000000000)
# define MAP_VMAP_START UL(0xffff780000000000)