diff options
| author | Jiaxun Yang <jiaxun.yang@flygoat.com> | 2022-08-03 11:30:08 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2022-09-27 13:19:05 +0200 |
| commit | fcdc0ab4b4d09bac65c192726af1c1bcb28de8e4 (patch) | |
| tree | 4da861c894add053f19a4d1fd41a9d8a99313576 | |
| parent | 2941e0fa050314cd200f24e3b99da61440b106ab (diff) | |
linux-user: Introduce stubs for ELF AT_BASE_PLATFORM
AT_BASE_PLATFORM is a elf auxiliary vector pointing to a string
to pass some architecture information.
See getauxval(3) man-page.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220803103009.95972-2-jiaxun.yang@flygoat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
| -rw-r--r-- | linux-user/elfload.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index c7e3f1d47c..581fbc858b 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1776,6 +1776,10 @@ static inline void init_thread(struct target_pt_regs *regs, #endif /* TARGET_HEXAGON */ +#ifndef ELF_BASE_PLATFORM +#define ELF_BASE_PLATFORM (NULL) +#endif + #ifndef ELF_PLATFORM #define ELF_PLATFORM (NULL) #endif @@ -2220,8 +2224,8 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, int i; abi_ulong u_rand_bytes; uint8_t k_rand_bytes[16]; - abi_ulong u_platform; - const char *k_platform; + abi_ulong u_platform, u_base_platform; + const char *k_platform, *k_base_platform; const int n = sizeof(elf_addr_t); sp = p; @@ -2243,6 +2247,22 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, } } + u_base_platform = 0; + k_base_platform = ELF_BASE_PLATFORM; + if (k_base_platform) { + size_t len = strlen(k_base_platform) + 1; + if (STACK_GROWS_DOWN) { + sp -= (len + n - 1) & ~(n - 1); + u_base_platform = sp; + /* FIXME - check return value of memcpy_to_target() for failure */ + memcpy_to_target(sp, k_base_platform, len); + } else { + memcpy_to_target(sp, k_base_platform, len); + u_base_platform = sp; + sp += len + 1; + } + } + u_platform = 0; k_platform = ELF_PLATFORM; if (k_platform) { @@ -2284,6 +2304,8 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, } size = (DLINFO_ITEMS + 1) * 2; + if (k_base_platform) + size += 2; if (k_platform) size += 2; #ifdef DLINFO_ARCH_ITEMS @@ -2361,6 +2383,9 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2); #endif + if (u_base_platform) { + NEW_AUX_ENT(AT_BASE_PLATFORM, u_base_platform); + } if (u_platform) { NEW_AUX_ENT(AT_PLATFORM, u_platform); } |